Rebuilt 302 casting heads available through Rockauto

toolmanmike said

I just chatted with a friend that is a expert about turbos. He simply explained if you trying to keep it in the stock rpm range, don't port the heads, If you are going for maximum horsepower/rpm then they need to be ported.

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That seems strange..... you can blow up about any engine by upping the boost enough and never touch a port LOL. Since the turbo impeller is a huge exhaust restriction and has a specific map, then it would have to be a pretty extreme setup to think of porting for most car engines. I ran 1.75 HP per ci on my 2.6L Starion engine and that was with just 14-15 psi boost... serious, but no where near an extreme amount of boost. Never touched a port.

Does this friend deal with truck turbos? If so, that is not generically applicable advice. they seem to have some pretty restrictive parts to start with.