Comparing N02 to PSI
 

how man psi from a turbo/supercharger would equal a 100 shot of N02?

...theres quite a few variables to consider here. Blowers, turbos, etc...dont produce the same horsepower increase on different engines. A 15 psi blower will roughly double the horsepower of the engine its on. If its on a 200 horse N/A 302, and tuned properly, you should make around 400 horses. A 15 psi blower on a naturally aspirated 90 horsepower chevy cavalier will make around 180 horsepower. In one case, the blower makes 200 horses, in the other, 90 horses, both with 15 psi. Are you starting to get the idea....

A little off the subject, but how about both power adders? the big dogs around here are running an s-trim, with a 50 shot n20, a saleen 347, that bent some valves before he got it tuned, but it was going 137-140mph traps, before it broke, street driven with a/c and powersteering, and a couple ls1's running low 10's around 135 mph, most automatics, and blowing out rearends....doht!

its a blast watching these guys go at it though:D

Mach 1 is right. At sea level, atmospheric pressure is 14.7:1 psi. For every pound of pressure (boost) you create above that, you increase the displacement of your engine. If your engine displaces 302 cubic inches at sea level (14.7:1 psi), then with 15 pounds of boost, which would double the atmospheric pressure, your engines displacement would also double, and become 604 cubic inches. The horsepower won't necessarily double, but the displacement does. Nitrous is just a way of adding extra oxygen in a controlled manner (the nitrogen controls the burn rate of the oxygen, so it doesn't just explode like pure oxygen would). Nitrous is more like having higher compression.

Take care,
-Chris