Holy cow, that is some awesome info there, thanks for taking the time to write that out!

Why do you recommend a compression ratio of no less then 9:1 and 10:1 with iron and aluminum heads (respectively)?

One thing that is a little fuzzy... A higher compression engine requires a higher octane fuel? And with out that higher octance expect detonation?

And... With high performance engines, the higher compression ratios result in the fuel and air being compressed real tight, and when they combust throwing the piston back down the cylinder harder resulting in more pep?

Thanks
Nick