Cheers all, thanks for the warm welcome. I'm hoping eventually it'll be pretty quick, its currently just under 300bhp/tonne, I've just acquired a version 8 lump which once sorted will hopefully give it in excess of 500bhp per tonne. In real terms the new engine needs to produce 370bhp. I'm hoping to do this as a separate project one the car is on the road, so any technical advice will be gratefully received.