Originally Posted by GraemeR

Okay, So I have a spare set of stock Evo heads in the shed and figure that it might be a good idea to have them worked a little bit and then bolt them onto the turbo engine.

Now I know that all the work you do porting heads for a normally aspirated engine is designed to allow air/fuel to be drawn into the engine in high volume and speed. BUT what about turbo setups??? I mean; I have 5lbs of boost pushing the air/fuel mix into the engine, so does the same theory apply?

In my mind the design would have to be different; but then again my mind is a strange place at times.

Cheers