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
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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.
GTO JUDGE RAM AIR 4 DYNO DAY
GLASGO 69 GTO RAM AIR 4 AND 70 JUDGE RAM AIR 4 Dyno DAY,THE 69 MADE 392 HP,AND
THE 70 MADE 384 HP.THIS WAS WITH NO TUNING.WE WILL BE BACK IN THE SPRING TO
SEE IF WE CAN GET EACH UP TO 400 HP AT THE WHEELS.
The First time my 400 Big Block got started.
Pontiac GTO Supercharged
The 1969 model did not have the vent windows, had a slight grille and
taillight revision, moved the ignition key from the dashboard to the
steering column (which locked the steering wheel when the key was removed,
a Federal requirement installed one year ahead of schedule), and the gauge
faces changed from steel blue to black. In addition, the rear quarter-panel
mounted side marker lamps changed from a red lens shaped like the Pontiac
"V" crest to one shaped like the broad GTO badge. Front outboard headrests
were made standard equipment on all GTOs built after January 1, 1969.
The previous economy engine and standard 350 hp 400 CID V8 remained, while
the 360 hp (270 kW) 400HO was upgraded to the Ram Air III, rated at 366 hp
(273 kW) at 5,100 rpm. The top option was the 370 hp (280 kW) Ram Air IV,
which featured special header-like high-flow Exhaust manifolds, high-flow cylinder heads, a
specific high-rise aluminum intake manifold, larger Rochester QuadraJet
four-barrel carburetor, high-lift/long-duration camshaft, plus various
internal components capable of withstanding higher engine speeds and power
output. Unlike the highest rpm big-block Chevy and Hemi motors, the Ram Air
IV utilized hydraulic lifters.
By this time, the gross power ratings of both Ram Air engines were highly
suspect, bearing less relationship to developed power and more to an
internal GM policy limiting all cars except the Corvette to no more than
one advertised horsepower per 10 lb (4.5
kg) of curb weight. The higher-revving Ram Air IV's advertised power peak
was actually listed at 5,000 rpm—100 rpm lower than the less-powerful Ram
Air III. The straight stock Ram Air IV's were easily pushing 500 hp (370
kW) with a few tweaks to the carburetor and timing, and utilizing a careful
mix of high octane airplane fuel in the tank.
The Ram Air V was introduced in 1969 to professional racing, not for sale
to the general public or in showrooms, and was sold and delivered in a
crate. It was a special 400 block with newly designed high compression
tunnel port heads and a special high rise intake manifold. A prototype GTO
so equipped could go 0-60 mph in 5.7 seconds, and the quarter-mile time was
13.89at101.76 mph seconds at 123 mph (198 km/h). Ram Air Vs were not
installed in GTOs at the factory; it was available only as an
"over-the-counter" product for professional racing, and therefore most went
to Pontiac racers of the time.
The most significant event of 1969 for the GTO was the launch of a new
model called 'The Judge'. The Judge name came from a comedy routine, "Here
Come de Judge", used repeatedly on the Rowan & Martin's Laugh-In TV show.
The Judge routine, made popular by legendary showman Sammy Davis, Jr. was
borrowed from the act of long-time Burlesque entertainer Dewey "Pigmeat"
Markham. Advertisements used slogans like "All rise for The Judge" and "The
Judge can be bought." As originally conceived, the Judge was to be a
low-cost GTO, stripped of some gimmicks to make it competitive with the
Plymouth Road Runner. During its development, however, it was decided to
make it the ultimate in street performance and image. The resulting package
ended up being US$332 more expensive than a standard GTO, and included
the Ram Air III engine, Rally II wheels without trim rings, Hurst shifter
(with a unique T-shaped handle), wider tires, various decals, and a rear
spoiler. Pontiac claimed that the spoiler had some functional effect at
higher speeds, producing a small but measurable down force, but it was of
little value at legal speeds except for style. The Judge was initially
offered only in "Carousel Red," but midway into the model year a variety of
other colors became available. Of these other colors, a "Ram Air IV Judge
Hardtop" painted in Crystal Turquoise with a black interior is the most
rare with only two known to exist, one in Chicago IL, and one in Lenexa KS.
The GTO was surpassed in sales both by the Chevrolet Chevelle SS396 and the
Plymouth Road Runner, but 72,287 were sold during the 1969 model year, with
6,833 of them being The Judge. The rarest 1969 GTO, omitting color options,
was the Ram Air IV Judge Convertible - only five were built (Year One
Engine--------------400 cu in (6.6 L) V8
455 cu in (7.5 L) V8
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 - 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).
1971 Pontiac GTO RAM AIR 455HO Action
This is a 1971 Pontiac GTO with factory optioned 455HO Ram Air, 4-Speed,
Air Conditioning, Power Steering, Power Disc Brakes, Air Conditioning, and
Tilt Steering Column