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 http://krepower.com/Pontiac%20Aluminum%20D-port%20Cylinder%20Heads.htm
Stock Pontiac Head Flow - Ron
WebMar 22, 2024 · Item description. 670 Cast Iron Heads that have been ported, I do not know who. Bought them second hand but had the cleaned and maged, checked good. Port work … WebPushrod tubes are designed to accommodate 1.65 rockers without grinding on the heads. Ports have a thick roof, wall, and gasket material areas for performance port work. Exhaust port is standard Pontiac D-port … iphone 30 pin to lightning cable
Inside the New Pontiac Head from Edelbrock - MotorTrend
http://ronspontiacpage.com/reference-pages/stockflowcharts.htm 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. WebMost if not all performance heads used screw-in studs. Today machinists can easily improve on any stock iron Pontiac head with the inclusion of hardened seats, screw-in studs, longer valves, taller installed height for after market springs working with high lift camshafts. Porting remains a viable means of improving flow for increased power. iphone 30 pin to lightning