compression ratio with n20

I know that if your going to build a blower motor, comp. ratio plays a big part. Is this true with a nitrous motor? I'm looking at building a 383 and spraying a 150-200 shot, what ratio should I safely run on pump gas?

some guys have run upwards of 12.5:1 compression on pump gas,but the tuning has to be perfect.

11:1 or 11.5 is good number to shoot for.

also remember to use good fuel when on the bottle with more cubes and compression.

That's the info I was looking for, thanks.