What do you think about this 318 guys.

Rat Bastid said
I don’t know how you do it but before I start picking parts I know how much HP I need to make and what RPM I need to do it.
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Would be the smartest way
Rat Bastid said
Then comes the heads, then I pick the compression ratio then cam timing.

If it’s pump gas I pick the compression ratio first then the heads and cam timing.
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Most seem to have some vague goals when building an engine, you seem to have a clear purpose.