Randi came to us with a 400 Pontiac project for his 1968 Firebird. He didn't want to go crazy on the build but he wanted something that would give him performance that is better than original.
With that goal in mind Scott did some custom porting on his heads, upgraded his valve train and went with a Custom COMP cam and lifters and aluminum roller rockers. We maintained his complete original rotating assembly but had to re-balance his crankshaft, it had been poorly balanced sometime in the past and was out by 127 grams on one end and 181 grams on the other. A single plane intake with a 780 Quick Fuel carb got it breathing and the fire is lit with a Flamethrower ignition package. Custom cut and fitted 8mm plug wires are standard equipment here at Sehr. Headman custom coated headers will be added at installation time.
The results were a satisfying 543.5 Hp @ 5500rpm and torque reading of 519.8 @ 5400rpm. Corrected to sea level the numbers are 577 Hp and 551 Tq with nearly 400 lb of torque at 3500rpm.
The Pontiac Super Duty 455 Story
The Pontiac Super Duty 455 was unique in several ways. This video will give
a bit of insight into what makes it special. The background music is
Funkytown by Lipps Inc. The Engine Block & Component Photos Are The
Property Of Jim Dietzler/HPP.
Pontiac 455 First Dyno Pull Hot Rod Tempest Lunati Voodoo Cam
My Pontiac 455 fresh build. Pro Gram Billet 4 bolt mains, Eagle H Beam
Rods, 6095 Lunati Voodoo Cam Valve Lift .527 INT 548 EXH; Duration 284 INT
292 EXH., Pro Form 950 CFM Carb, 1971 Super Duty Round Port HO "197"
castings #481768; Fully Ported; 2.11/1.77 valves; Milled .055; 103 cc's;
Lazer Valve Springs H-O Racing Enterprises) 1.770-1.785 installed height;
7/16 screw in studs; 11/32 pushrods; Pushrod Guide plate holes elongated
for clearance; 1.65 Harlan Sharp Roller Rockers; ARP head Stud Kit., Doug
Nash Warrior Intake port matched, JE forged pistons, 10.3:1 compression.
500HP 500 Ft pounds of torque. Built by Blackshear Racing, Brookfield, Oh.
Dynoed at Tubs,
Part1 1959 Pontiac 389 resurrection for "The Find" 1956 GMC 250 Dually
I HATE PRE-ROLL ADS! YouTube can't seem to get the code right. I've reset
the defaults to NO PRE-ROLL ADS 3 times now. Sorry for the pre-rolls. I'm
still working on it. Snagged a 1959 Pontiac 389 from an hour or so away.
Pig in a poke, really, but they don't get any easier to find as time goes
on. The 56 needs a heart transplant, and 389 cubes is the biggest direct
bolt-in you can get your hands on! I don't know how many parts there will
be. Just trying to get it edited and uploaded!
Cubes... Gotta have cubes...
Sehr Performance Machine / Ryan's 350 Pontiac
Ryan dropped off his 350 Pontiac long block along with a set of 400 Pontiac
Ram Air cylinder heads, an Edelbrock intake and his Holley carb. He wanted
us to put it together for his '69 Firebird. His engine came to us with
blow-by issues from a broken piston. First off the cylinders had to be
relieved to clear the valves on the Ram Air heads. The heads were milled
to reduce chamber size and valve to block clearance was checked one more
time. All of his parts were inspected and magnafluxed to be sure we were
starting off with serviceable parts and the clearances were brought back to
low side of factory tolerances, a new custom COMP cam and a distributor
curve kit were added along with some other touches, the engine was painted
Pontiac Blue and bolted to our Dyno. Ryan is very happy with
the end results and is looking forward to getting it back in his car and
having some fun with it.
Pontiac Performance Tips from Butler Performance V8TV
http://www.v8tvshow.com - 314-783-8325 - Certain engine builders specialize
in specific brands, and for Pontiac power, Butler Performance is in the
forefront. We visited Butler to get the lowdown on the latest in hi-po
parts for Pontiac V8s and to spec out a motor for project "Splitter."
Here, David Butler takes us through the shop and brings us up to speed on
the latest in Pontiac performance.
Sehr Performance Machine / 229 cid V6 for Costa's Repair Lihue, HI
Our customer called all over to find a shop that would do a Chevy 229 V6
for his 1980 Malibu. He had to go 3800 miles to find a shop that was
We have really enjoyed the relationship that has developed during the
coarse of this build. It's fun to work with someone who gets excited about
what their doing.
With a lot of custom head work, a custom COMP roller camshaft, and some
other trick parts and machine work we were able to develop 474 lbs of
torque and 503 horsepower.
Pontiac 400 break in
Number matching engine. Pontiac 400 cid. Break in of camshaft.
Formula 1973 with non stock color ( it supposed to be Burma Brown)
Tony Bromley's 400 to 460 stroke Pontiac Dyno Pull | QMP Racing
550 torque @ 5800rpm
535hp @ 4000rpm
For those of you paying attention and noticed the numbers aren't the same
on the screenshot, its because we made another few runs, but didn't tape
them. We'll upload a pic soon.
QMP Racing is located in Chatsworth, CA
Check out our website: www.qmpracing.com
Like us: facebook.com/qmpracing
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chatsworth California hp horse power torque trq Dyno rpm turbo drag Exhaust run Boost psi dragster raceway nitro Nitrous super Supercharger muscle burnout idle motorsports Mustang cam Ford hydraulic
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Mazda Ls1 Motorcycle Bike
Proformance Unlimited's Pontiac 400...Live engine run
Pontiac 400 built by Proformance Unlimited Live Run
You can view this engine package at the following link:
Pontiac 400 with 450 HP engine package with Edelbrock aluminum heads can be
custom designed to your specific needs. All engines can be custom painted
to match your vehicle at your request. We can outfit your engine with the
exclusive March Performance serpentine belt system. We can also assist you
in choosing the proper transmission and stall speed converter combination
for your vehicle and have it shipped directly to you as your performance
crate engine is being built.
'68 Pontiac Firebird ...Pontiac 400...Built by Proformance Unlimited
http://www.customcrateengines.com/ Live run of a Pontiac 400 engine built
by Proformance Unlimited...engine will be run in a '68 Pontiac Firebird
You can view this engine package along with available upgrades at the
Our staff is available Monday-Friday 8am-5pm to answer any of your engine