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 / 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 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.
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)
PONTIAC 1970 formula 400
1970 formula 400, complete engine rebuilding, YS block, #13 heads, forged
rods and pistons, RA3 cam (068), iron intake, home made 1968 Q-JET
converted to electric choke, RA4 headers, complete 2,5" Exhaust.
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.
Pontiac 350 - 350 Horsepower For Less Than $500.00
A short video describing the modifications done to the 65,000 original mile
Pontiac 350 engine in my 1975 Formula. Using heads, cam, pushrods, rocker
arms and an intake that I had laying around, this Pontiac 350 developed 353
horsepower and 385
lbs/ft of Torque, for less than $500.00 invested.
'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