completly redesinged in/ex ports are also in mind, when revving over 8krpm.
I was thinking, maybe we can go the same route as the hayabusa turbo guys, a dragteam from over here have welded up the complete intake port and "stolen" a cosworth port profile which the cnc'd in the head with an enourmous gain in power.
that would be sort of a cheapish way to get a profile that's proven and well engineered, and when you're at it coppy the cam profiles aswell,
GM did that in the past with stolen desings of ,GM bought, porsche 911's aswell and apparently with good results.
welding up shouldn't be that hard, only time consuming. and can even be done using some sorts of epoxy resin though I doubt that that would live long.
5axis cnc milling isn't as expensive as it used to be anymore by far, so this might prove a nice way to try some stuff, last time I checked my head shop charged more than the local hightec machine center cost so....
I think/hope maybe Erol RMS can shed some light on this.
grtz Thomas