455 Pontiac Crate Engine Built For Sports Car Revolution by Proformance Unlimited
http://www.proformanceunlimited.com and Sports Car Revolution team up to bring new life ultra rare 1971 STUTZ BLACKHAWK.
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Proformance Unlimited's 455 Pontiac Crate Engine
Pontiac 455 Crate Engine Built By http://www.proformanceunlimited.com/
You can view our Pontiac engine line at the following link:
Whether your vehicle is a GTO, Fire Bird, Trans Am, Lemans, or a timeless
classic, here at Pro-formance Unlimited we are here to help design and
build the engine combination that will match you with your vehicle. Please
browse our crate engines listed below or custom design one of your own.
From that special built stroker engine to that turn-key drop in ready crate
engine, call Doug or Steve we will be happy to answer any of your
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)
Chevy, Olds, Pontiac and Buick V8 engines are not the same!
Evidently a segment of the automotive enthusiast population does not
believe that the four main GM divisions had their own versions of a V8. In
addition there may be people who simply never knew that fact.
In this video I show photos of a 350 cid engine from Buick, Oldsmobile,
Pontiac and Chevrolet and highlight the differences in each. Buick and
Pontiac V8 engines went out of production in 1980, Oldsmobile's in 1990 and
of course the Chevy versions lasted a lot longer because they were cheaper
to produce and easier to smog/mpg certify.
I challenge anyone to video themselves removing a Chevy SBC head and then
installing it on a Pontiac, Olds or Buick engine.
PONTIAC - stock Pontiac Super Duty 421v8/405hp vs stock Chevy 409v8/409hp on DYNO
WATCH THE VID TO SEE HOW CLOSE THEY Dyno TO THEIR FACTORY
405hp/409hp ratings. Growing up.....Pontiac/Oldsmobile old timers/EXPERTS
who taught me most of what I know, often told me Chevy rated their horsepower in a more
optimistic way than say Oldsmobile or Pontiac. I've even heard Pontiac
rated/tested their engines in a 100 degree room, compared to Chevy in a 60
degree room. These Dyno results seem to reflect
that some of what I heard was true. Both of these engines are great, but
the results do seem to show that Pontiac was not rating their horsepower worrying if it
would cause "songs to be written" about their engines .... like the great
song "She's real fine my 409"--(Chevy).
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.
PONTIAC GTO Judge (1971 455cid, the differences basic supertuning can make)
Those who know me well, know that I always beat "SUPERTUNING"
"SUPERTUNING" "SUPERTUNING" into the ground. This video shows the
difference minor tuning can do (This is minor because a 1971 GTO's fuel/ign
calibrations are already geared for performance, so there's not as much
improvement you can make like you'd be able to on say - a late 70s
smogger). But on larger scales, HUGE differences can be made, as much
difference as adding performance parts alone. The more the car is severely
out of tune/adjust------which happens more with the more mods you make,
then the more you'll gain by supertuning it. There's another vid on YT
where an Olds 455 was built with performance parts to be totally streetable
but achieve 1hp per cubic inch. After they got the recipe of perfect parts
all together they were disappointed when she only Dynoed at 320hp. But luckily
they did not give up! After the proper ign-curve/timing & carb adjusts were
made, the engine jumped from 320 up to 455hp!! No doubt all the new
cam/intake/head mods put the old fuel/spark adjustments badly out of
calibration for the NEW BREATHING ABILITY. Also with things like dual quads
(especially to engines not originally equipped wit them), your adjustments
are most likely going to be way off and need calibration even more. There's
lots of dual quad cars out there not running well for this reason, however
the few that have been calibrated perfectly (EVERY adjustment set for the
best "stop watch" time, etc) truly do run like a bat out of hell!
Pontiac 455 duet
The LeMans (on the left) has a mild, non-rebuilt 455 with ported & polished
6X heads, c. 9:1 compression, Edelbrock Performer intake, Holley 800 Street
Avenger, Comp XE274 cam, making maybe 300-350 horsepower. The Grand Am
(right) has a .030 over 455 with Edelbrock heads (87 cc chambers), 10:1
compression, same Comp cam but with 1:65 roller rockers, slightly better Exhaust (H-pipe), Edelbrock Performer RPM
intake and Edelbrock 750 carb. About 500 horsepower at the flywheel.
The heads make all the difference. The Grand Am has the Flowmaster American
Thunder Exhaust system, which has the
50-series mufflers. LeMans has a Summit Exhaust system, which was cheap and went on nice