Thread: head upgrade disappointment

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aluminum head vs iron head can come in to play for heat and the cr as you can run a point more with aluminum heads. the point i was making is you can buy a good name brand head with good flow number and can have better port velocity then a china aluminum head . head that volume is 210 that tells nothing other then the cc of port volume to fill it not low lift numbers or velocity at low lift. or how the wet flow of the head is . you can not just assume thing like head CC are what are posted from maker or flow numbers. as some valve s are dish some are not. this plays in to the over all cc of the head chamber . with engine s with to big of head s . you can do two things if you keep the heads move up the power band and buy parts for it to make power . or try to build more low end by using more cr can help to a point a cam shorter duration re work port runners is alot of work . dual plane intake and a EX with a cross pipe like a X pipe. buying just a 170 to 180 runner head will help if there good heads stock gm heads or the pbm thunder heads are a good way to go .360 cid engine the big head can work. your weigth is low but thats if heads are good. but your game plan needs a new attack angle