Stu
Intrested in Ratios, i have always been one for standard ratios, i must admit i did struggle to run my old sierra twinky at 1 Bar boost with 10.5:1 compression, but now im YB with standard compression, intrested to read on whats a viable BHP output on standard compression ratio, and what compression ratios suit what horsepower, i know there are many factors that surround this, but a ball park would be good, as we seem to get people on here running 6.9:1 ratio for say 500bhp, and 7.2:1 for 450bhp, when you speak to M Shead and others he is quite happy with standard comp into early to mid 400bhp, for 430bhp he was happy with standard comp, so reasons why people go for 7.2:1

Thanks, for the Info

Also intrested in gas flowed heads and thoughts on what level of porting is required