Just been thinking about something Tom said to me the other day about one guy fitting a mk4 head gasket to a VR. He said that it increased compression ratio by 0.5, and that led to an improvement in torque. I been thinking about why that was, and determined that all it does is improve thermal efficiency, and thus make more from the existing fuel air mixture. I did wonder what would happen if you were to increase the compression ratio a further 0.5. Do you think that would improve things still, or do you think that would just result in some blow by on the top ring due to the increased pressure? Perhaps different rings to provide a higher sealing pressure would help? Or would you end up increasing the friction losses, and thus result in lower power?

[/rambling]