WebJan 29, 2009 · Either is fine 400 or 455. 75 and later 455's are a little weaker but I know of one that is making 878 hp and is fine. 400's have a smaller main journal which is a good thing on Pontiacs and can be border to make 455 cubes easy. 455 Cranks can be made to turn down to fit a 400 block but if you have the 455 then just use it and keep rpms under … WebMay 8, 2014 · According to one head manufacturer, good airflow numbers measured at .200, .400 and .500 inches of valve lift are the most important for a street performance engine. ... On the other hand, if you’re building a high revving race engine, or a big displacement stroker (over 400 inches), you could probably go with larger runners for increased ...
Choose Pontiac 400 or 455? & Turbo Questions Hot Rod Forum
WebRevving Pontiac's tunnel-port Ram Air V. Lance Kramer’s Ram Air V engine was built using NOS components including the mechanical camshaft. It idles around 1,200 rpm and … WebOct 4, 2015 · The big Pontiac Ram Air 400 was also a victim of underrating, advertised at 366 HP at 5100 when in fact maximum power is 410hp @5600. Number Six: Buick GSX … edinburgh park barrier fob
Sorting through Pontiac’s Ram Air engine production
WebALL ALUMINUM Pontiac Road Race Engine from Butler Performance. 496 c.i. w/ 730 HP on PUMP GAS. Butler Performance 461-474 c.i. Crate Engine with Edel. Lowrise 2x4 intake and 2 Edel. carbs. Starts at 500 HP and 550 … WebApr 1, 2007 · Paul Spotts responds:The W72 option in '78-which carried over to the four-speed 400 T/As and Formulas in '79-actually had a completely different cylinder block than other Pontiac 400s of the... WebAug 25, 2010 · 69' Pontiac 400 Block 69' #46 Heads (72cc) with 2.11'' intake and 1.96'' exhaust valves milled in, ported wiseco pistons Crank and Rods Pontiac, balanced ... Having even 10:1 compression, 100 octane, and a high rev cam will definitely kick you into the back of your seat. I would recommend a cam with minimum .550 lift even more would be good … edinburgh park gravelly beach