Originally Posted by Autech 
If you put some old spare valves into your head, you can work the chamber very carefully and de shroud it. You will probably take out 1-2 cc of volume across each chamber.
Also knock the edge off the quench pads that overlap the cylinder. Bevelling them on a 45 takes away hotspots which will bring up detonation under boost. Also makes it safer if you are going to race the engine, sustained load will eventually see this edge burr and pitt and leave small bits of aluminium to burr up and run through the chamber.
Hey Thanks for the Advice Autech......By the way do you have the cc ratings of the heads in question...GTiR, VE, VET
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