High compression is very ill-advised when using a super or turbo charger. You can use high compression with nitrous, because you have to severely retard ignition timing. This is partly because nitrous has the effect of drastically speeding up combustion. The pro-mod engines drop compression from 16:1 to 14.5:1 when going from N/A to spraying, but this is an extreme example. For any street application using nitrous you can run as much compression as N/A, but good fuel and retarded timing is a must. The retarded timing does help guard against detonation, but it is mostly necessary because of the rapid combustion process nitrous causes, and power loss is much less than with a N/A application. This is of course because of the extremely high cylinder pressures encountered in a nitrous engine.
Ok, I thought about it and typed an answer. I stand by what I originally stated, as the question was how does comp ratio correlate with nitrous, is it similar to turbo/super charged applications...not how does compression ratio correlate with forced induction. 2 entirely different things, nitrous and turbo/super charging.
