Considerations for a motor running N2O

Have you ever ridden in a car with a "big" turbo? My 20g shows positive manifold pressure at 2100rpms, I cant say when it shows full spool because I am still only at 18psi for the clutch break in but it is hitting that 18psi by 3500rpms EASY and it wants to keep pulling far beyond redline, something a smaller turbo such as a 16g wont be able to do since it runs out of air at higher rpms, especially with mods as simple as a set of cams or ported head.

If you are wanting to run 20-22psi on the 16g on pump gas you would be severly limited in the cr you could run. A turbo that is larger and more efficient at that boost/airflow level could make more power without the risk of detonation even with higher cr and pump gas. Also remember that if you are choosing to run a "big" shot of nitrous with a small turbo vs a big turbo (because you choose to race from 1500rpms and dont want to wait for the turbo to spool or downshift) then the turbo is going to become a restriction in your exhaust and intake path...

My $.02