Originally Posted by Chip

I dont believe there is a right or wrong answer, it all depends on the rest of the spec.

As rod mentions, he is getting massively more power than that on what most people would consider a fairly small head, but then he has a MASSIVE turbo.

Trying to get 600bhp out of a 600bhp turbo will probably require bigger ports than trying to get 838bhp out of a 900bhp turbo etc.

I agree with Rod that its easy to get carried away though, especially when selling things to people as people want to "see" the difference when they buy a head.