Sehr Performance Machine / Randi's 400 Pontiac
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.
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)
The First time my 400 Big Block got started.
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.
Pontiac 400 engine after rebuild
This is engine for my new 1977 Trans Am "Racer". Specs: '73 block with
stock type crank (.010), pistons (.030) and rods,'69 heads No. 46 with no
mods, stock '69 intake manifold, Summit headers, CompCam 268 HE complete
camshaft with stronger valve springs and 1.6 roller rockers.
389 Pontiac On Simtester
Watch John Edwards as he describes the Simtesting of a 389 Pontiac GTO
engine at Costa Mesa R&D Automotive Machine. (949) 631-6376 Be sure to
'Click' and SUBSCRIBE.
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...
Engine rebuild part 1
This series is available on DVD Here is the link
We are rebuilding a GM 350 5.7 engine. Now in this particular case we
are also going to upgrade the engine to a 383 6.0 This is called
building a "stroker" motor. In other words we are increasing the "stroke"
of the engine which increased the torq & horsepower.
If you are able & wanting to rebuild an engine, this video should give you
a good overview of what to do. If you are having someone else build an
engine for you, you will be able to see what's involved in the process
1967 Pontiac Firebird 20 Year Cold Start
We work on starting my new 67 Firebird after it has been sitting for 20
years untouched in Wasilla, Alaska. The tags expired in 1989. It has the
original Overhead Cam Inline Six Engine. Before starting it we put oil down
the cylinders, primed the oil system, changed the oil and replaced the Cap,
Rotor, Plugs, and Points. A Complete restoration is planned for the