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 … 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 …
Sorting through Pontiac’s Ram Air engine production
WebJul 19, 2024 · Yes, highway rpm increased as well, but I rationalized it by deciding that 3.23 gears provided a good balance of performance and economy. Currently, my 1967 Buick … WebNov 13, 2024 · The Edelbrock cylinder heads have Ram Air exhaust IV ports—so you should use this set of Hedman headers. Keep your compression ratio at about 9.5:1. According to Edelbrock, this combo will … circuit breakers at home depot
Question about cleaning throttle body and now high revs? Pontiac …
Web650+ HP Pontiac 400/487 cu.in. 10 photos FAST XFI Sportsman System, FAST 4150 Black Anodized Throttle Body, Pontiac Edelbrock Victor 1050 Intake, Edelbrock Aluminum Heads, Comp Custom Cam, Johnson lifters, GZ Evac Pump System, Custom Butler Valve Covers, and much more ... Butler Performance custom builds Pontiac engines to your … WebSep 11, 2003 · After tearing down a 400 I used to run is when I found the stretched rod bolts and then after some research found that this is a common problem for Pontiac engines, … 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 … circuit breakers apple tv