400 Pontiac Dyno Run

My Pontiac 400 on the Dyno. Numbers ended up being 432HP and 488 ft-lbs of torque

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Pontiac Engine Dyno 482 cu in
786 HP @ 6900 RPM. Torque 675 ft pounds @ 5100 RPM.

Pontiac GTO 400 Engine 1967 Dyno Session Motor Test
Completely built stock type Pontiac engine by bakersfieldcrateengine.com This engine made over 400 HP and 500 TQ All stock parts except for the internals

Pontiac 400 HO engine Dyno Test
This was a Dyno Run on my Pontiac Firebird 400 HO engine build and tested by Terry Walter Precision Engines. Pontiac 400 block +.030 Pontiac #16 Heads 2.11/1.77 Forged Piston dished to bring CR down to 9.2 comp XE262H Cam Holley Carb Cast Iron Intake Pontiac Long Branch Headers

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).