Here's what our customers
have to say about us......
I'll be selecting a few of the
hundreds of Thank You messages we receive.
We've been so busy
I haven't had time to update this page lately,
so here's a few recent updates...for 2013-14
Ignition Kit and FBO Custom Curved Distributor
Hey Don, All I can say about the stuff you sent
me is, Wow. That truck must have been running on
6 cylinders because now that thing is banging on
all 8 for sure now. She runs through first
pretty fast and second is leaving a shingle in
the road and third she just don't know when to
stop haha. I really appreciate the technical
help and the products I received. The
installation went flawless and she runs better
I remember you requested I send pictures of my
new engine after I installed the new distributor
and Q850 carburetor.
The engine is a 427 small block stroker.
The engine runs like a real beast. The spark
plugs all look great.
Your loyal customer,
I will hook it up to
the constant vacuum port on the intake manifold
where the booster is connected!
If you didn't gave me
advise on this matter I could have ruined the
motor...............so I have to thank you for
this you are a lifesaver!!
In Holland the USA cars are
serviced by people who don't care about the
little details if it runs ok it's fine but in
the long run the over advancing of the wrong
vacuum port could destroy the engine....I did
visit a local USA garage and tuned it but after
that session the motor did run like crap so I
ended up with FBO and now the problems are
Thank you many
times!!!!!!!!! You have learned me a lot about
the basics of timing, for a lot of people this
is hocus pocus!
Thanks again for all your help. I was so
frustrated with the way my 1967 440 hp ran ever
since I put it to together with an electronic
conversion about 6 years ago, It didn't seem to
have the performance it should have had.
Rebuilding & re-jetting the carb just made
things worse. After talking with you, Having
you guys set up my distributor properly, And
replacing the original points style voltage
regulator with your VR-1 regulator, It`s like a
whole new car! It idles now, and WOW it really
moves..... And uses less gas. A real plus at
PREMIUM prices. I actually love driving it
again. I will be recommending this distributor
service to all our customers at
Restoration Technician at
Check out Graveyard Carz on Velocity TV
6.3.13 Unleashing the Potential
So here's how it went yesterday, we installed
the distributor and timed it at home per your
instructions. Ran way better no more eye burning
tailpipes all around it felt better at cruise
and playing a little on the freeway.
We made one pass still with orange box and it
ran 12.17 at 94 MPH previous best was 12.19 at
92 MPH. Then we installed the HRR box, it
ran 11.94 with no other changes. It pulled hard
all the way down track i could feel the
improvement in the seat of my pants. Yee Haw!
after 5 years we got into the 11's! We
base lined the Q750 at home as per your book, we
then bolted on the carb just as delivered no
internal changes other than the Air bleeds you
sent, we followed your guide and adjusted the
idle speed and 1/4 turn on the AF mix screws and
it smoothed right out.
Last test run for the day it ran 11.78 at 101
we were all doing the happy dance, best money
i've ever spent on this car
First round i screwed up with a red light but it
ran 11.80 at 101 again doesn't matter I can't
tell you how pleased I am!
Driving home from the track fuel mileage check
it picked up 4 miles per gallon from 9 to 13
after all changes, 115 miles each way 230 miles
I'll say we'll now save 9 gallons of premium at
$5 per gallon $45.00 IN ONE ROUND TRIP!
just going to the race track the rest of the
year we will save over 1/2 of what we spent and
with all the other driving we do with it my
return on investment will come by seasons end,
it like getting 50-75 HP for free! and yes my
wife WILL now ride in the car with me LOL
This is a 440 in a Dart, .... Jay it was
always there we just needed to unleash the
potential power. We really appreciate you
taking the time and effort to go through this on
track test with us. Sorry about the wife
Hey Don, this is Bud You have been helping me
with my Dads Hemi 426. I just wanted to send you
an email and pictures. I love the new ignition
box and coil. I will be ordering one also for my
Made In China Orange Box Vs.
Made In USA Orange Vice... Vice 1 -
Orange Box 0
A big thumbs up
for the HRR688 Ignition Box
Front Drag Shocks
They did the
trick. I went to Yakima with a couple of heavy
hitters from Woodburn and went out in the 4th
round on Saturday. The good news is that my 60
ft. varied only .009 from high to low. 1.650 to
1.659 out of 10 launches
Just a note to say thank
you for your guidance and advice over the last
few years. I tune my car always referring to
your guide and have purchased from you quality
components that have again been a major
contributor to winning performances. Over the
last two drag racing seasons I have purchased
from FBO, CalTracs Suspension, FBO Fuel system,
FBO distributor, and Slayer carb components. In
2012 I won the NZDRA Super Street National
Championship and National Meeting. This season
(2013) we moved up to Super Sedan and won NZDRA
National title with our super consistent car!
Thanks again for all of your advice and tuning
Taupo, New Zealand
I got everything
buttoned back up in the charger. WHOA! What a
difference switching to the vacuum advance! NO
hesitation....smooth power across the board once
I got the timing right. Honestly it's never run
this well. I'm thrilled to get rid of that dumb
ballast resistor as well! Thanks for taking
care of everything for me, and for throwing that
tuning guide in. I had one from you years ago
and it was a little beat up from being around
the garage. Very much looking forward to getting
this carb set up right, which it never has been!
I'm sure I'll be in
I've recently ordered and received 2 or your
gotten tech info. by phone. I just wanted to
let you know that your service and support are
FIRST RATE! The 2 products ordered were
received the next day. I'm telling all my
racing buddies about your company.
From our instant Chat 6.23.10
12:57:17 PM [Don]
1:00:44 PM [Bill] Thanks Don. Awhile back
I sent you my distributor for a re-curve. It was
for my 66 Chrysler 300 if you might recall? I
just wanted to say that what you did for me is
absolutely awesome. The re-curve and the
associated parts I purchased from you have given
new life to my ride. No more rich smell and
bogging at initial acceleration. I am still
using the Edelbrock 750 at present but as soon
as the funds loosen up I will get that speed
demon 650 you suggested in its place. Again
1:02:06 PM [Don]
are most welcome!!!
1:02:26 PM [Don]
We appreciate you taking the time to call us and hopefully you'll
tell your friends
1:04:12 PM [Bill] I just cannot believe
how nice the car runs. It's as if it is brand
new. And all that I needed to do was get the
re-curve, your ECU, Ballast, and Coil, hook
everything back up, adjust a little timing and
mixture, and voila...runs great. Now if we could
just get these storms down here in Northwest
Florida to stop, I would drive it more...
1:04:29 PM [Bill] We will do more
business real soon...Bill
Don & Staff
Just wanted to say thanks
for all your help with my carb and timing
problems Chevy V-8 327-750 Holly DP mech..
Even though I purchased
only a couple of small items from you never once
did you turn me away with all the numerous calls
You and your staff were
always on the money with getting my problems
resolved. There are not too many people like
yourself left that will take their time and
offer help to us car enthusiasts unless we are
spending a lot of money, my hats off to you sir.
Furthermore if at the time
you could not speak to me you would return my
call…WOW! At first I thought I’ll never get a
call back but low and behold you did call back.
In closing if you or your
staff ever get down to Atlantic City, NJ please
feel free to call on me as you will always have
a friend here.
Kevin R Mc
Thanks Kevin, you never
know you may have a visitor some day-Don
It's Chuck here in Illinois with that 65
Cuda, and the 273 with the Isky cam - we've been
discussing the vac pot, a possible ReCurve,
If there is a testimonial page, this is a
story that belongs there...
I bought the A688 kit 3 years ago, rebuilt
the stock 273 a year ago, and have not had the
valve covers off since I warmed up the motor for
the first time, and set the valve lash on the
new mechanical cam. After a year of fighting
poor performance, unaware of my error, I called
you and talked about the low vacuum, and that I
checked everywhere, and can't find a leak. You
refused to take my money, to get a ReCurve on
the distributor, and a new vac pot to activate
at lower vacuum. You said you would not take my
money, because you knew there was some other
issue, and there is no reason why my little 273,
even with a .425 lift, 260 dur. cam would not
pull at least 16" vacuum.... You were right
!!! I pulled the valve covers and found
bonehead screw up. When I put the heads back
together, and set the valve lash, I had set them
to .013 ALL VALVES, intake AND exhaust. When I
warmed up the motor for the first time, I
checked and they were all still at .013, so I
left it... I WAS HOLDING OPEN THE EXHAUST
VALVES SLIGHTLY the whole time since a year ago,
which is why I could not build vacuum, which is
why my advance pot would not work, which is why
my mileage and performance stunk, etc, etc,
etc... Proper setting is .013" for INTAKE and
.021" hot lash for EXHAUST...
I was getting 12.5" vac and running
extremely rich, and as soon as I reset the hot
lash, and put it all back together, the first
turn of the key I had 16" of vac, and had to
turn everything DOWN... I went to a steady idle
of 900 rpm, disconnected the pot, set initial
advance at 17-18 degrees, leaned the idle screws
down to 1.5 turns open (they had been open all
the way), and then reconnected the vac pot, and
13 degrees came right in... After adjusting
timing and idle screws, I now have a crisp idle
at 950 rpm, with 16.5 - 17 vacuum...
THANK YOU for taking the time, despite not
having a sale in 2 1/2 years, thank you for
sticking to your guns that there was a different
problem and I had to find that first, and thank
you for your HONESTY, and not just booking a
sale, when you could have... It's like my motor
woke up from a bad hibernation, and now it pulls
like crazy, and is a ton quicker, especially in
the mid range... I finally feel like it is
running at it's potential, and that's a great
Reply: It's just the way we
I thought I knew
what I was doing with regards to tuning and
setting the timing. I bought your book and
after reading it, It was eye opening
experience on tuning this carburetor and
setting the timing and it also gave me tips
on racing and the tricks people would do that
I did not even realize. so since I got the
book the car is running consistent and I have
won some rounds not a whole event but I am
sure it will happen.
Thanks and I do
recommend the book.
Some great news for you, this year was a
tremendous year for me and my 1967 Dodge Coronet
with a stroked 431, as I became the Sportsman
track champion at Western Colorado Dragway. I
have purchased from you the FBO Ignition kit,
the FBO Ported mechanical fuel pump, a Mighty
Demon 750 ETS and a complete Cal-Trac
system, including mono-springs, front and rear
shocks. Of course I was given your
Tuning to Win
book. This was my third season and after two
years of hard work and your help everything came
together. I started off the season winning the
first three events in the sportsman class,
followed by winning the Mopar only class special
and taking a second in the fourth race. From
there I had another win, two more seconds and a
couple of semi-finals. With your help and the
FBO products that I have purchased from you over
the years has propelled me to where I am today.
The last change that was made to the car was the
Cal-Tracs system. What a difference that has
made in consistent launches, you can even see
the tires wrinkling upon initial hit. In fact
during a test and tune session I took my
father-in-law down the track with me. What made
that so special is that when I hit the throttle
he almost fell over the bench seat in the car.
You should have seen the smile on his face after
the run, he is a die hard Mopar man and is the
one responsible for getting me hooked on Mopars
and drag racing in general. So I can not tell
you enough how much I have appreciated your
hours of time, comments, coaching and
suggestions over these past couple of years. In
fact I even have a fellow Mopar guy working with
you now too.
Thanks for Everything.
9-27-2008 from a hand written letter verbatim:
Don & Staff
to say thanks for all your help with my carb &
timing problems. Chevy V-8 327 750 Holley DP
I purchased a couple of small items from you,
never once did turn me away with all the
numerous calls I made.
You and your
staff were always on the money with getting my
problems resolved. There are not to many people
like yourself left that will take their time and
offer help to us car enthusiasts unless we are
spending a lot of money, my hats off to you
if at the time you could not speak to me you
would return my call…WOW!
At first I
thought I’ll never get a call back but low &
behold you did call back.
if you or your staff ever get down to Atlantic
City, NJ please feel free to call on me as you
will always have a friend here.
I hate you
and I love you, everything you told me was right
on, I screwed up and it's hard to admit
sometimes that I'm not as smart as I think I am.
I bought your 850 ETS carb and you were right I
went .2 faster. Then you curved my
distributor and I went another .1 quicker. Your
spacer plate and careful plug reading and it
went 9.98. So here's the hate part, now I
have to spend $3k to make it and me legal for
NHRA.Thanks, I'm really having a blast and you
were right I do have a 9second Mustang.
This may in
fact be your first testimonial from someone who
has not purchased a single item from you (yet).
I just wanted to take the time to say thank you
and put my 2 cents in to anyone thinking about
doing business with FBO. Yesterday I emailed you
my spec sheet along with a relatively long
winded paragraph venting about how the 340 in my
Dart was performing below it's potential at
1:44pm EST. Now I was thinking to myself. "I'll
email this sheet, someone may or may not check
that email today and may or may not call me back
but it's worth a shot..." I honestly didn't
believe it when at 3:29pm EST (just 1hr 45min
later) I received an email back stating you
thought you knew what my problem was and you
were going to call me! Sure enough at 3:31pm EST
I received a call on my way home from work and
you spent about 45min on the phone with me (in
the middle of your busy day) troubleshooting my
issue and by the time we were done I had a clear
path before me on how to proceed to correct my
340's lackluster performance and an offer
(actually more of a request!) from you to call
you back as soon as I had made a few changes so
we could proceed to get my car on the right
track. All this without a single dime changing
hands whatsoever. I was sold after reading the
plethora of tech info you've posted on the
website and filling out my sheet hoping, sending
it and hoping for the best. Now after
experiencing the level of customer service you
extended to me before I was even technically a
customer, I'm sold for good. Thank you again,
now I have to get out to the garage and get to
work. My order for the correct coil and ballast
resistor are coming...
Hi, I got a copy of your book on demon carbs it
is by far the best book on carbs that I have
Thanks Jon Wilson
I recently purchased your book Tuning to Win and
have done a lot of reading on your website. The
information is truly amazing and I have learned
a ton. Thank you for providing so much help to
us Mopar guys.
HEI distributor works beautifully. I'm at 16*
initial with no more
throttle ping, it'll idle respectably, and has
response right out of the box!
think I could use a little more stall in the
converter but it's very
now. Good work.
for a very positive outcome after a long
struggle. I'll call you
when I've stashed enough lunch money to upgrade
to your Demon carb
and really get it going.
the guide a few minutes after I spoke to you.
I've only read the
half. But, I can already tell I'm in for a real
comes to carb tuning, I'm a complete novice.
However, you've made it
forward enough that even I can understand it.
I appreciate your explanation of the physics
behind all of the
components. It helps explain the reason behind
for all the time you put into this. You've
definitely won me
as a customer
4years now I've been picking your brain and every
single time you hit the nail right on the head,
you've taken my piece of crap car to level of
perfection to rival an Indy car. everything is
as perfect as you promised. i made a copy of
your book for a friend so I just Paypaled you
to NY and the beers are on me.
a quick note, got your ignition installed w/ a
new set of plugs and have driven it quite a
bit the last couple weeks and just wanted to
say my car runs a 100% better!!! It
starts quicker, idles much better and is a ton
more responsive. Now I need to save my
pennies and nickels for that new Demon!
currently have installed your Stage 2 ignition
kit in my 340 Mopar.
kit solved a 2-year old idle problem for me and
I could not be
You made me a believer!!!
Now I would also like your tuning book.
for yet again great service! I have dealt with a
lot of vendors
car hobby and I will have to say, you are the
best.... Very, very
and very punctual... This is not very common in
that I thank you!!!!
going to fill out a data sheet for a Demon Carb
and send to you for
recommendations..... So look for it in a day or
do I send the money?
mechanic charged me $370.00 and couldn't make my
car run worth a d*m, told me my motor was no
good. I bought your book for $10.00, had
you curve my distributor for $69.00 and it runs
like a Swiss watch! I took the car back to
his boss and we went for a ride, he read your
chapter on ignition tuning and refunded me all
the labor back $300.00!!! So I figure I
owe you at least 1/2, he wanted a copy of the
book, I gave him your email address....charge
him $100.00 he deserves it.
I assume you have received my $10 payment? I
have the blue covered "Demon tuning
guide" book and I have to say I consider
that to be almost worthless compared to the
information in your guide.
I went through your tuning guide and adjusted
the carb based on your info.
The car idles great and I hit the gas and its
a crisp response.
Again, the guide is awesome. Every demon
owner should have it!
You should be proud of your reputation and satisfied customers. Must be doing
something right......Hope you have a good holiday, and thanks for your honesty.
I just wanted to say thanks for getting me the head gaskets I needed in a
hurry they got here Thursday a day early, your customer service is GREAT.
I'm the one who needed the 4.125x.040 SB head gaskets
Thanks again Larry G.
Installed the stage II distributor this morning in my 340 Challenger. And all I can
say is WOW !!!!!
Talk about a huge difference.
408 SB Stroker Cobra- Portland Oregon
Remove a 850 and install a 650 Mighty Demon, re-curve distributor,
problem solved, clean idle, instant throttle response. All issues gone!
"I had no idea this car had that much power lurking under the hood, I was
disappointed in the engine I chose until you fixed it!....I'm now a very
happy Cobra owner."
427 Cobra-Russ from Hillsboro Oregon
650 Mighty Demon Installation and distributor re-curve
You couldn't have chiseled the grin off this guy's face with a Jack
Hammer, he finally got to drive his car without fighting it down every
inch of the road.
I received the 650 Speed Demon and the recurved distributor. It took
me a while to get the grin off my face from the much improved throttle response…no
hesitation…it pulls strong in every gear ( I didn't get into 5th, yet)…it
shuts off without dieseling…and it can even spin the tires now without much
difficulty. It's like a completely different vehicle.
Havn't touched a setting on the carburetor at all. It idled great right
out of the box. There may be some fine tuning to do, yet, but I'd like
a little more time and new spark plugs to make sure before inquiring too
Also, the distributor recurving is great. I didn't realize that the
couple of degree bouncing behavior that it used to do was not normal.
It is now rock solid and stops dead at 15deg advance from initial.
The housing ear is limiting me to 19deg initial when it hits the temp sensor
in the manifold, so I will be doing some modifications to allow me to get
to 20deg initial.
Hello Big daddy
Why didn't the Holley and Barry Grant tech people tell me this stuff I've
struggled for 2 years trying to make this car run right, tried 3 different
carbs and 2 so called performance distributors ($2100.00 total spent). I
read the book, made the adjustments and it's perfect!!!!!!!!!!!!! all issues
are solved for with a $10 Book, $20 Bushing kit, 2 hours of reading
and 20 minutes under the hood.
I'm not a mechanic by any means but after reading this book I feel like I'm a professional tuner...just awesome!
Thank Al Gore for the Internet *Laugh* I love my car again
Don, this tuning guide is amazing! best 10 bucks i've ever spent on my car.
Thanks very much for all your help and extremely reasonable prices.
I added a little to offset the Paypal fees. Can't wait to get the engine
dolly, and look forward to dealing with you again.
PS: the tuning guide is fascinating and will be of great help!
From the Club Cobra Forum:
had the pleasure to do business with Don Gould who is the proprietor of FBO
systems. FBO specializes in Barry Grant's Demon Carburetors among many other
Don was very helpful by working with me on a suitable configuration
and replacement for my 13 year old Holley 850 double pumper on my 428 FE.
Don took all of my engines specs (Cam, heads, intake, feet above sea
level, etc) and suggested the "correct" Mighty Demon for my application.
Being fully versed in Cobra replicas, he was aware of my turkey pan cold
air box arrangement, and provided the correct gaskets and AN fuel line couplings
(I provided him a digital picture of my current plumbing to assist).
Once I ordered the Mighty Demon, Don performed his magic by inspecting
the carb via a tear down and testing it and adjusting the carb to
my engine's specs.
Within one week the Demon arrived. Installation was fairly straight
forward with only one glitch. A minor 1/32" adjustment to the turkey pan
needed to be made to allow linkage clearance.
The AN fittings supplied were a perfect fit.
The Mighty Demon 750 has three minor differences from the Holley. First
is that the center post is 5/16" which is a bit larger than the Holley 1/4" center
post. The center post holds the air cleaner on.
Second difference is that the Demon takes different fuel line fittings than the Holley... Don provided these.
The third difference is that the Mighty Demon has TWO idle speed adjustment
screws, one on each side of the carb whereas the Holley had just one.
To sum up, the carb is beautiful and frankly makes my engine feel totally
different and much more responsive. I am still fine tuning the idle speed.
I highly recommend FBO and Don Gould and the Mighty Demon double pumper.
Well the Chevy keeps on getting better with the fine tuning help from
you! I took the car to Bremerton Raceway this past weekend I did the test
and tune Saturday and raced Sunday. I went four rounds before I FELL a SLEEP
on the light….. The Street Car Ran A 11.79 @ 114 and my 60’ was 1.62 not
bad for a 4000 pound PIG. Some even said the Drivers front had Day light
under it. (It felt like it did but I want to see a picture first) Any way
just wanted to update you on the Car…. The Demon and your four hole spacer
are working very good for me! Thanks for all your Help!!!! Mike
You convinced me to go with the 650 Demon in place of my 750 Holley on the Roush 427 in a Superformance Cobra, thanks.
Have put 1500 miles on it and it performs as you said it would. Have
turned a few screws but back to nearly the original settings, good job.
Just got back from the Texas Cobra Spring Fling at Round Rock Texas, about
85 cars there.
The other Superformance guys were impressed with the overall performance
with your carb, what little I lost on the big end (if any) I more than gained
back in driveability and bottom end performance. Two of the other Superformance
cars had the same Roush 427 with the 750 Holley's, I gave them your website,
I'm sure they will be calling.
One problem. I have messed with the timing at idle. Like you
said it likes 22 deg. Roush wants me to stay 35 deg (or below) total.
I need a bushing that will give me 12 deg. in the distributor. (I will stay
with a 34 deg. total) MSD says they can't help me, they don't make
that bushing. You know of anyone I can order from??
Thanks again, the carb has done all you said it would - - - happy customer.
Bushing kits are available from none Other Than ....FBO Systems $19.95 set of 3, 16-14-12 total advance.
Well I took the old Chevelle to Seattle this past weekend and I finally got my 11 second time slip!
It ran an 11.986 and an 11.99.
Any way I thought you might like to hear I lost to a MOPAR that was
dialed a 11.08 and ran a 11.09 It was a real good race though I ran right
on my dial (11.99) My car also 60ft’ed 1.68 which is the quickest ever
for the 3900 lbs. pig. All in all not bad for driving the car 5 hours, racing
it and driving it home!!!!
I used your Tuning guide to make the jet changes and it was right on!
I can't believe the difference between the old Holley and this Demon, awesome, thanks
The car is incredible, no bogs or surges, instant throttle
response, the Demon carb and your Ignition really woke this motor up, timing
is set at 18 initial, starts right up and idles, even when its warm, it
starts right back up, but I do have one new problem, TRACTION, but we will work
on that another time. I am very impressed with the 575 Demon, stomp it to
the floor and hold on, can't wait to take it to the track, what would I have
to do to become a dealer for you!
I took your advice contrary to what my engine builder said and bolted on
my friend Frank's 750 Mighty Demon , which is a carb that you sold him and
set up. He's about 2-3 weeks away from needing it so I thought I'd
give it a try. I wanted to see for myself who knows tuning and who's just
full of BS.
We took off the custom tuned and modified 850 Holley with a 2" open spacer
and bolted the 750 Mighty Demon down with your 1/2" 4 hole spacer kit (NICE
Gaskets!) and installed the FBO Coil and ECU kit. It fired right off and
idled at 1050, exactly where you set it for Frank's motor, how do you do
that? Set what? We didn't even touch the idle screws it ran and idled like
it came out of a super tuners shop.
Old best time 12.39, first pass was a 12.02, we adjusted the launch RPM and
tire pressure and it went 11.97, scared me when it launched. We moved the
timing to 22* at idle and installed the 12* MSD bushing you made for me,
it idled even better! If that's possible, the throttle response on this 440
is unbelievable, I did have to bring the idle down from 1275 after the timing
change....check this out..It Ran11.92!
That's a 1/2 second faster than it has ever run!
We made 3 rounds 11.94, another 11.92 and 11.932 (broke out on a 11.94 dial)
I know, if I had of read the tuning guide you sent Frank more closely I would
have dialed a 11.91. I have never had that many runs so consistent.,
The plugs look perfect (pic attached) and it ran cooler than normal, started so quick you couldn't hear the starter even engage.
Yesterday I called the engine builder and gave him the results of the smaller
and WAY CHEAPER carb with your CORRECT timing numbers in the motor....his
comment "He must be modifying those carbs, I've never seen any Demon
work properly and where did he get those stupid timing numbers from? You
need at least 36* in that motor"
It was all I could do to refrain from calling him and idiot and hanging up
on him. I asked him if he would like to buy his perfect 850 Holley
($659.00 plus $350.00 for his modifications) and the orange box that he sold
me ($79.00), he didn't find that funny at all and again claimed
that you must have done some secret hocus pocus modifying of the carb and
if he had the opportunity to tune it he could make the Holley outperform
the Demon in 2 passes, I reminded him that he had been to the track with
me on 3 occasions over 2 years and charged me nearly $400 in parts and labor
to "Tune it"...he made a very derogatory remark directed at me and you something
to do with intelligence and sex and hung up?...Guess I need to find a new
engine builder, I don't think I'll have to look far, I have your number on
got me to the 11's when no body else could over 2 years and probably $2000
of dyno tuning and carb modifications, everyone told me I needed more motor,
more cam, more carburetor, more this, more that, more, more and you did it
Frank needs a new 750 Mighty Demon, no way is he getting that one off my
engine, you have my CC info on file please ship direct to Frank.
He wants it set up exactly the same way, do you take trade in's? I have a
ugly old 850 Holley I'd like to get out of my sight. If I can
sell it I'll be ordering those Racer Brown rocker arms...you are the Guru!
Well I will admit I do some very tricky Hocus Pocus Voodoo stuff to those
Mighty Demons, I take them out of the box, baseline adjust and check them
to be sure everything is correct. Then I wave a burlap bag of Hair
of Goat, frogs toenails and chicken lips over the top of the air horn, mumble
some words I learned from a good looking Cajun Girl late one night at the
Rampart Hotel in New Orleans, finish off by letting Duke the Big Red Shop Dog give it a big slurp on the secondary float bowl and it's ready to go.
Tell Frank his carbs on the way.....I'll have Duke give it a double slurp, he has no shortage of tongue
Just wanted to write and say thanks, in regards to the electronic voltage
regulator. My Mom ended up ordering one for me. Anyways we got
the part a couple of days ago, put it in and it works perfectly. It's definately
nice to be able to use the Barracuda again after a month of dealing with
I'll definately recommend you guys to my friends if they have similar problems .
Once again, just wanted to take some time to say thanks for offering such
an awesome part, especially after dealing with 3 mechanical regulators popping
I now agree with you on that choke
thing, your distributor and carb set up was flawless!
We had a few brisk mornings with temps in the mid 30s and below freezing
over night. At 6am, I head off to work and
every morning this thing fires quick and runs beautifully. I've never had
that before, even with the DFI I tried.
1970 Ford Torino-Vancouver Washington
to the track yesterday - had a good day including winning a
couple of rounds - good air!
After your last work on my car, 60 foot best is1.991 with an average 2.030,
1/8 best is 8.884 with an average of 8.948, 1/4 best is now 13.927 with
an avg of 14.038, and top speed has been 97.11 with an avg of 96.29. Improvements
are .339 quicker in 60 feet, 1.047 quicker in the 1/8, and 1.371 in the
1/4. Old top speed was about 93.2.
A little math to compliment your efforts!!
Weighed my car - car and driver 3830.
This is a stock short block with cast pistons....351W, we ported the
DOOZ heads, Racer Brown Hydraulic Cam, Dynamic Convertor.
Turn around time, parts and installation 6 days.....another
happy customer :-))
Hey Don...We Won :-))
Your 360 beat up on my Buddy's 451, no problem.
We made 3 passes and even though I was desperate for traction it hooked up
in time to smoke that 451 stroker..Happy dance!
Next year we'll work on the traction problems but I just can't see this Dart
being able wear a big enough tire to hold the tork of that motor
Hello, my name is Ol' Rock. I'm a 1972 K5 Blazer
from Aggieland, USA
and this is my story...
I found a new home 8 years ago with a 17yr old high school kid from Mansfield,
Texas. I was a little scared, but then realized this kid
acknowledged my joints were old and I didn't have the spring in my step
to keep up with all the youngsters around me. I received a few
bandaids, but these were only temporary fixes until real surgery could be
afforded. In 2001 I received a transplant...a new GM crate engine -
a 330HP 350. This was great! I was running better than I had in years and
we were both so happy. I would still cough and spit up a little in
my mouth early in the morning. A bit of uncontrollable backfiring wasn't
uncommon...it was so embarrassing! My owner tried throwing more
heat at me through a MSD 6A ignition box and a Mallory unilite. That helped
a little. I was drinking too much and just never could get
enough air to get going like I really should. Next we tried new mouths...
we went from a Holley 2B Digital injection system to a Carter
AFB. Finally, we went to a specialist to find out why I never could run
as fast as I should and why I was coughing up through my Carter and why no
amount of tuning would smooth out my stride.
Dr. Don Gould of FBO Systems had a few suggestions. As it turns out, I was
spinning to tall of gears to get going off the line, and my little
crate motor couldn't get pumping in the power band before getting bogged.
First step...install a Dynamic Converter with a 2800 stall
speed. This would allow my little bowtie heart to beat a little faster for
a better start. Stupendous! A little physical exertion test
revealed the crate motor wasn't tuned for best performance from GM. Instead,
a little marketing was used to sell a old technology, muscle car era camshaft
in this power plant.
Racer Brown supplied a new camshaft specifically ground for these 330HP
heart with Vortec heads. Now, we needed to work on my nerve firing, breathing
and drinking problem. A new MSD HEI was recurved and phased for accurate
timing and energy
delivery regardless of whether I was standing still or all out sprinting.
A BG Speed Demon was custom jetted and handled my lungs and
gave me accurate doses of go juice right when I needed it. To make sure
my thirst was quenched while going full banshee, a BG pump with braided lines
was installed next. After hours of assembly, a little bleeding and a lot of
praying, I was ready for my first steps!
WOW! Response is absolutely incredible. I can jump off the line and spin
my 33" BFGs if I'm not carefull (3:08 gears, TH350 trans) and I
can run with the best of 'em now. The makeover is truly amazing. I'm a little
on the heavy side (4 wheel drive with NP205 and steel skin
inside and out), but I'm easily outrunning the youngsters around me.
Scalded dogs can't keep up with me! What's really great, is that I can sit
idle without shaking, and start all out screaming with immediate
response. I'm calling June 1, 2004 my Re-Birthday. It's amazing what someone
who knows what they're doing can do to help you. Follow ups
were great, and phone counseling was always welcomed. I'll be calling to
say thanks as soon as I can stop smiling and move my mouth again.
'Ol Rock - 1972 Chevy K5 Blazer
Disclaimer: Don Gould is not really a doctor, although his ability to cure
my ills without seeing me is remarkable.
No animals were harmed during product testing.
GM350 330HP crate motor
Mallory Unilite Distributor
MSD 6A Ignition
Hooker Competition Headers
GM TH350 Transmission (stock gears)
GM 12-bolt rearend with 3:08 gears
BFG 33" All Terrain tires
Racer Brown custom camshaft for 330HP GM crate motor (lifters included)
MSD Pro Billet HEI - recurved and phase aligned for precision
Dynamic Conveter - 2800rpm stall
BG Speed Demon 650 CFM carb with Mech Secondaries
BG High Flow Mechanical Fuel Pump
SS Braided Fuel line from pump to carb with dual feed.
Great Story Clint, Give Ol' Rock a Kick on the Loud Peddle for me!
Last night at the track i pulled a new best ET and MPH.
last year my cuda went 11.87 115mph and last night i went 11.67 116.21
mph!!!! Had a new best 60ft time also at 1.65.
I guess he likes his new FBO Ignition kit :-))
" I must admit that I became frustrated with this, and in desperation,
replaced the Holley with a BG Speed Demon. What an improvement! The engine
even sounded better. And my eyes weren't burning anymore. I'll never put
another Holley on a Hi Po engine again."
...another Happy Demon Carb Owner!
the car runs great. I know there is more tuning to do, but at least it is
has a very cool idle. The timing was checked again and it is at exactly
36 degrees total. I just wanted to
say thanks for all the help and great parts. I will be calling you in
the future and sending my friends in
your direction. (See this Cobra in the Customer ride section)
"Take off that Eddy 750 and put a real carb on it then
get that distributor curved......."
...................2 weeks later....... :-))
Drove my Car to work Yesterday and had three friends in it and It spun
the tires until 3rd gear, Usually just got a good second gear chirp.....
going to the track on Saturday
Email Discussion with customer............
may need a 4.5 P/V but I'm still not sure if you don't have other issues,
the RPM drop is way high, my car drops from 1500 to 1200.
Have you checked for a vacuum leak?
You are very good!!!!!! I was messing with the car last night after
work and low and be hold My power break booster line that is plumbed right
to the manifold was off completely!!!!!! I will double check every
thing with the vacuum line all hooked up and just start over with the adjustments.
Thanks for keeping in touch I am glad I bought from you I think Summit
would have just sent me a sticker and took my money!
Thank You for your support, we work hard to "EARN" our Customers loyalty.
It pays to support your Independent Performance Shop....you may need
them one day....
From a message board:
another forum (MoparChat) the DUI system got slammed. Very unreliable
apparently. Another company, FBO systems, was named as one that has a
similar offering but is much better. Many, many folks were glowing with
praise about FBO. Almost seemed unanimous in their praise. Works for me!
1969 RoadRunner 440 6Pak
purchased a King Demon RS from you last fall (got it after meeting up
with you at Indy Show in January at Smokey Bones!). '63 Polara tube
car had run a best of 9.72/134. Bolted on the new King Demon, ran
9.44/137. 1.60' went from 1.38 to 1.29
I finally got the chance to get my car on the
road. It is an awesome pulling machine. It has power all the way from
idle to above 5500 RPM
where I shifted it. My wife was in the car and when I just
shifted into 3rd she told me to slow down. I didn't... I told here I
still had a gear to go!!!!! :) I got called a name that I don't know if
I can e-mail to you. :) She didn't like the continual hard pulling of the
car. She drives a new Beetle so I guess we'll give her some slack. LOL
That is of course except I now may have to go and see my doctor
and have my nose removed from the inside of the back of my head. LOL
Ya da man Don!!!!!!!!
(This is one of our 400HP 360 Crate engines, Hydraulic Cam, Pump
Gas, Smogger heads)
Don, I just wanted to let you know I got to try the coil this past weekend,
did some t&t with it, and my other
one, and I will have to say I was kinda surprised, your coil was
.03 quicker than my other one, guess which one will stay
on the car.
I BOLTED IT ON, HOOKED EVERYTHING UP, AND YESTERDAY ACTUALLY
GOT A REALLY GOOD OPPORTUNITY TO TEST IT OUT (HAD SOME MINOR FUEL LEAKS
TO WRING OUT FIRST). ANYWAY...IT'S AWESOME!! NO STUMBLE,
ALL POWER THROUGHOUT PEDAL RANGE. IT EVEN SCARED ME A COUPLE TIMES!!
;) BIG TORQUE INCREASE OVER THE EDELBROCK. I HAVE
BEEN FIGHTING CARBURETOR PROBLEMS AND DISAPPOINTMENTS FOR AT LEAST TWO
YEARS. THIS IS THE FIRST TIME I CAN SAY THAT I FINALLY HAVE A
SUPERB CARB AND IT DIDN'T BREAK THE BANK GETTING IT. NOTHING BUT
GREAT THINGS TO SAY ABOUT YOU AND YOUR TEAM DON. MY DECISION TO GO
WITH FBO AND DEMON WAS ONE OF THE BEST I'VE MADE. IF YOU HAVE ANY
FBO SYSTEM DECALS CAN YOU SEND ME A COUPLE AND I'LL DO A LITTLE ADVERTISING
THANKS AGAIN DON...SCOTT (HOUSTON)
I changed the power valve like you suggested (it seemed to
accelerate a little smoother, feels like its almost like it
when it was EFI). Then I added the 4* initial timing,
then I did one more
full throttle run, and the plugs are light tan, no popping at
all, and it seems to have all its power back like it
Thanks for all your help!!!
Don, I'll work on that total timing, it will probably
be a couple more weeks before I can take her around the block, but it
sure feels good to have the idle problem behind me! I can't thank you
enough, but I can assure you that in the future, when I'm in the need for
performance parts, the phone to your order desk will be ringing!
I'll make sure that my Cobra
friends have your number when they are ready to shop.Yes, I can surely
now see the difference between talking to the guy behind the counter
at the local parts shop, and talking to the guy who really know his
Thanks a million!!!
Hey there..I'm hoping you can help..even though I'm a Chevy guy..I need a new Demon carb,and want to get
the right one.
Thanks for all your help, you have a permanent place in my
address book..It's hard to find people who have a genuine interest
in helping others,especially when this is not just a hobby..it's a
I would like to take a moment of your time today to
thank you very much for your help and assistance in helping me get
my truck running like it should.
As I'm sure you may will recall I purchased a new
crate motor, 330hp/350cid deluxe engine
which came with a 600 Holley.After I gave in to the fact that I couldn't
get it running anywhere near it's ability I went on-line to find help.
After finding your web site and reading about Demon
carbs and reading your statement about your help in resolving problems
and tuning help I must admit I really didn't believe it.
How wrong I was!
I did purchase a carb "625 " and had my distributor
phased and curved, once I received the products and installed them
I thought I had a different truck but most of all I was truly surprised
and amazed at the amount of time you spent with me on the phone helping
me resolve my problems. I work in the manufacturing sector "injection
molding" as a maintenance manager which requires me to do business with
many vendors and I must say they could all learn from you as to what the
word service really means.
Most of all I love my truck now and it runs like it
should thanks to you.
Burlington N. Carolina
you so much for all your help in getting this Demon tuned
properly. You spent quite an amount of time with me trying
it over the phone. We made a Road Demon perform like a
race carb. I know
this is a difficult task since the ear is a very good judge
issues were covered and addressed and repaired. I'm one
happy camper. Yes I
did have an obvious problem that I did not find until later
in the tuning
process, but all is well and my TRUCK? is running well.
81 short and wide with a new 355
sbc. It's been 30+ years since I've done
this type of toy and Don refreshed my memory on quite a
Thanks again for all your help. I didn't buy the carb
from Don nor even
thought of using it on this machine, but Don helped me
to get it right.
Got the Cuda
I was able to get a high rise throttle bracket
from XXXXXX so I was able to keep the 1 inch spacer
WOW what a difference.
I haven't even really gotten on the car yet
but 3 things stand out.
1-Ice cold it starts right up.
2-After setting only the idle speed it has
15 inches of vacuum almost steady.
The best I could do before was about 12 -
14 very wavy.
3- I only took it around the block because
of rain but NO OFF THE IDLE STUMBLE!!.
I could never get rid of that and I usually
had to ride the clutch a bit.
At idle I have 20 degrees and I have
34 degrees total.
Also on both front and rear sight glasses
the level is almost exactly in the middle.
I'll keep ya posted
Just had to pass along a note of "THANKS"
for your help. Wayne and I got our carbs in and tuned yesterday
and they run great! What a difference! For the tuning portion,
we both ended up with 5/8 of a turn out on the mixture screws to
achieve max vacuum at a constant RPM.
Got the Challenger running last weekend and it runs
awesome! That Demon is a breeze to tune compared to the Holley
or the Edelbrock. I do need a bigger fuel pump but that
will be a week or so 'till I can get to that and I won't be driving
the car too much for now anyway.
I used your knowledge on the carbs and plug
reading to whip up some black magic on my two barrel 318 wow what
a difference!! I just figured the tranny couldn’t handle all those
horses at once ha ha. I'm going to check it out in a few minutes
I hope your right.
Thanks for the help.
I called him on a Sunday
and we ended up speaking 3 times that day. The bottom line
is that before my first call, I could not get around the block
without two footing it to keep it running. After my last call that
day, she was purring like a kitten. I am sending my distributor to
him for recurving and testing and I am sure it will run even better
when I get it back. He did not just tell me "do this" or "do that,"
he took the time to explain why. Not only did he help me to get it
running great, but I also have a better idea how the carb works.
I will be going out of my way to make future
purchases from FBO systems. Their prices are very competitive,
and you cannot beat the customer service. All of us know that
there is no such thing as a "bolt on" and it pays to buy from people
who know what they are doing and are willing to get you through it.
And, Don is a Mopar guy- enough said!!
Don Gould is one of the
most intelligent, friendly, knowledgeable people that I have ever had the
pleasure of working with. Don had answers to every question I asked, and
even more importantly, all of the questions I didn’t ask! Don is fair, good
with customers, and very, very good at what he does.
Don worked on my 1965 Barracuda 340 for
a few weeks despite headliner stuffing falling on him, broken
seats, electrical problems (which he fixed), and an overabundance
of advance. The car I received back from him is one of the
most finely tuned instruments I’ve ever driven. It starts right
up, it barks when I rev it, and man, does it sound nice. If you’re
thinking about sending your car or parts to someone, don’t hesitate—run
to this man. He’ll treat you right and you won’t regret it.
Thank you Don.
All is well, Corvette
is purring like a kitten -or should I say TIGER!
That last $150.00 I spent was the icing
on the $15,000.00
4 shops, 2
machinists and 300 opinions (all Wrong!) and you solved it
in a "Heartbeat ",
too bad your stuck on those Mopars we could use you
over here in Chevy Heaven.
for all your help.
Thanks a bunch for your time, the Mighty Demon
works great! I didn't even have to do much tuning, just lowered
the float levels slighly and adjusted the mixture. I've never
had a carb swap go that smoothly! The motor is idling in gear
at 800 rpms with 12-13" of vacuum. No flat spots, no backfires or
hesitations, it just works beutifully. I'm suprised at how much low-end
this motor has, too. The 3.55's don't seem to be a problem for it.
Just wanted to let you know you have another happy customer!!
Just wanted to let you
know the re-curved dist is in and had some time to play with
the car. Better idle, better throttle response, better sound.
Very nice. One negative: It has an even greater
traction problem now. In a positive light though, I can
now rationalize some Goodyear Blue Streak road race tires or some
Hoosiers to my wife. Safety issue now, right? Ha ha.
guesswork, you get it back and it is right. The only negative
from this is I now have an even worse traction problem.
Don, you the man. My cousin down in
Calgary was playing around for about a month with his 360 and I must
have spent 4 hours on the phone giving him some pointers to get it into
the ballpark. He constatly was complaining about no power and I suggested
he send it to you for rebuild. It came back and he phoned me up and could
hardly contain himself he was so happy. Just dropped by his place today
on the way home from my sisters and he did an improptu smoke show in his
back alley that he couldn't even get a bark out of before the rebuild.
Just wanted to drop you a line and say,
that everything you told me to do worked out great. All I did
was lean the idle circuit to where you told me to. I also bumped
up the idle a bit with the idle screw. Were still a little on the
heavy side, but the car became Deadly consistant, and when the D.A.
dropped, the car picked up.( Was using a freinds weather gauge).
you very much for taking the time, on the phone, to help me out.
Needless to say, I dont think I'll be needing those green sleeves.
I will however be contacting you when I'm done this season to send
you this carb so you can go through it.
Just wanted to let you know, I went with your
recomendations on the jetting. And, all I can say is, your
the man! Car was dead on all day, plugs have a tan flesh
color all the way down to where the porcilan meets the metal.
Thanks a bunch,
I screwed up.......
Oh Oh what happened?
I forgot to turn on the cooling fans on Sunday in the
first round, it ran 9.32 at 138 MPH and we won but the temp got to
Yikes!.....and what happened?
Nothing, the Cometic Gaskets held perfect, no problems
at all the car ran normal all day, faster and quicker. The
extra compression we got with the .027 gasket seems to have cut about
.02 off the time slip. That's 16 passes
now on the Cometics no problems, the most we got out of a set Felpro's
was about 10 passes.
That's great John, are you a believer now?
You bet I am, I called the engine builder and at first
he didn't believe me, he's sold, and he'll be in touch with you
If those hadn't of been Cometics it probably would
have filled with water and grenaded the motor , best money I ever
Thanks John I appreciate the call and the good news.
Hello, this is ______ from ______Machine Shop, I need
to order some Cometic head gaskets are you the right Guy to talk
LOL...yes I am.......
I ran across your tech article on tuning air bleeds
on the 750 demon.
I have had my demon carb for two years and for two years
it has been
running rich, sooting up the plugs, belching black smoke.
So yesterday I opened the air bleeds to .070 diameter
as instructed in
your tech article and that made all the difference.
That carburetor is as good as gold now.
Thanks for sharing your information.
Last night I adjusted
the 4 corner idle and now it idles real smooth. I also gained another
1" vacuum at the same idle rpm. That is now a total of 2 1/2" vacuum
at the same idle rpm as both of my eddies and the original AVS carb.
These numbers are in neutral and I will be plumbing a vacuum line
into the car to see what the in gear and cruising vacuum numbers are.
The throttle response is even better than before, just like you said
it would be
Awesome carb! Thanks
Need some help or advice, I'm here
Hours are 7am -4pm Monday-Thursday, Friday we
close at 2pm.