I think I understand this better now. When you increase your compression in a conventional way, you decrease the volume at TDC, which will give you more torque, but does not do anything to actually increase the mass of air in the chamber. Forced induction would be more like increasing your total compression ratio by increasing the volume at BDC, which would get you more air into the chamber.

So why is it that NA engines will have detonation issues with higher compression ratios (say 15:1), but my Impreza can boost 15 psi (2:1) and then compress that fluid an additional 8:1? That’s a total compression ratio of 16:1 as far as the fluid is concerned. Is this because in the case of a turbo motor you have the ability to cool the air in between compression stages, but on a high compression ratio NA motor, you cannot cool the charge in the middle of the compression stroke (except maybe by using a phase transformation of water or methanol or gasoline).

Why even bother with gasolene!

Water is where its at Y0!

All life begins from water!
The water god been lurking around in here so be carefull of what you say. He might strike you down! :lol:

I hear Colonic Irrigation is big in the us of A! :lol: :lol: :lol:

Maybe in San Francisco...:lol: :lol: :lol:

The Euro's are the one's that instead of TP, shoot water on their bungholes to clean of the dingleberries.:lol: :lol:

haha my name's Luke, check my youtube videos just search "RXHEAVEN" if you don't believe me. Or look on FDowners.com and I am top poster there.

I am good friends with Pete though, maybe his humour and language is rubbing off on me :)