WebPontiac Cast Iron Cylinder Head After years of extensive R&D both on the flow bench and on our track, we have developed some of the best performing round port and D-port cast iron … WebJan 9, 2024 · GM. In 1969, Pontiac introduced two updated versions of the Ram Air engines. The first was the Ram Air III, which was a 400 cid V-8 with big-valve D-port heads, cast iron intake, and high-flow exhaust manifolds. The Ram Air IV was a 400 cid V-8 that featured the round port heads with redesigned intake ports.

Porting Pontiac Heads - Pit Stop - Hot Rod Magazine

WebMay 28, 2013 · 874. The 6x-8 heads are low compression heads, they will work good on a 400 engine if prepped properly, larger exhaust valves, port work, etc. 500 hp is a pretty stout 400 cid pontiac motor. I would play to the pontiac engines strength, which is torque. 500 lb ft of torque is doable. 500 hp will be a challenge for a street engine. WebAfter our Performance Prep Modification your heads will be superior “mechanical condition” to run 7,000 rpm for a few thousand laps. Note: 7,000 rpm for a few thousand laps will not happen with off-the-shelf warehouse heads without this type of work. Performance Prep is done to all our heads prior the more extensive modifications like SST ... cara pakai ellips hair vitamin

Victor Pro Port Cylinder Heads - Butler Performance

WebApr 21, 2024 · aluminum head options for 461 stroker to get to 650hp Pontiac 400 block So my short block is almost finished with a fully forged 461 stroker from butler in a 4 bolt main block. I'm shooting for 650hp and I'm trying decide which top end to go with to get there. The suggested to me by butler were....... Edlebrock bare castings Round Port WebSep 24, 2024 · The Pontiac Performer D-Port head is made from A356 aluminum alloy, and will fit all 1962-'79 Pontiac V-8 blocks with a 4.06-inch or larger bore diameter. It is available with three different size combustion chambers--65cc, 72cc or 87cc--and is cast with thicker port walls than stock Pontiac heads and molded with smaller port sizes. ... WebAug 9, 2016 · Step 1: Remove the cylinder head. This process will vary from engine to engine, so you should consult your manual for all the details. Generally, you’ll need to remove any parts from the head obstructing removal and you will need to remove the nuts and bolts securing the head. cara nonton youtube tanpa kuota axis