Just wondering how far you can port the 270 18rg head.
I have one to do and i don't want to cut up the spare head to find out.I want to go as far as i need to get the maximun flow possible but without going into any water jackets.
Will only be used for racing so high revs application as won't be going under 4000 on the track.
If any of you 18rg experts could help that would be great.
Thanks.
EDIT
Surely someone here would know how far you can go.