Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Port CFM vs. Valve Size vs. Port Velocity...Data WANTED!
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Old 04-11-2006, 07:19 PM
airraptor airraptor is offline
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i have seen many 383 running the e-tec 170 head with air gaps making 470hp and 490 torque.

if higher rpm then look at the e-tec 200's

high cfm and high air speeds is what you want.

on my drag quad i have stock sized valves and ultra high velocity porting and its the best head that i have had done. so i am a firm believer in the high speed and cfm stuff
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