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 & easy.

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Tony Bromley's 400 to 460 stroke Pontiac Dyno Pull | QMP Racing
Numbers: 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 Check out our website: www.qmpracing.com Like us: facebook.com/qmpracing Tags: qmp racing quarter mile race car engine motor custom high performance chatsworth California hp horse power torque trq Dyno rpm turbo drag Exhaust run Boost psi dragster raceway nitro Nitrous super Supercharger muscle burnout idle motorsports Mustang cam Ford hydraulic Street pontiac Cars Supra "Drag Racing" Pontiac Shelby Dodge Twin Stock Mazda Ls1 Motorcycle Bike





Pontiac running 2009 big cam idle
1964 Pontiac Tempest, 2dr Post, 455 .040 over, 4X heads, Comp XE274 cam,Performer RPM manifold w/ Edelbrock Performer 800cfm, Full Pypes X Exhaust with RacePro mufflers. Engine has Holley 3130/750 now and different timing set up. Made huge difference. I could never get the Edelbrock carb to work right. And yes the Mr Gasket header gasket on the driver side was leaking just 40 minutes after break in.





Horsepower TV - Pontiac 455 ( 474 ) - 612 Pump Gas HP - Dyno Pull
Thanks to the guys on HP TV !!!!! - 12/30/2000 - Factory Distributor - Here you go Pontiac People redid this for your viewing pleasure !!!! .





1969 pontiac lemans 455
Here's a video of my 69 lemans with rebuilt 455 bored .040 over (464), speed pro pistons, edelbrock rpm camshaft, 6x-8 heads ported, comp cams rollertip rockers, edelbrock valve springs, procomp intake, 750cfm edelbrock carb, and flowtech headders. This combo makes great power and I love the torque this monster makes. Next upgrade will be edelbrock aluminum heads to really wake this beast up! Please comment on engine combo, body, and suggestions. Thanx




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