Nitrous Oxide

Good afternoon I need some help with this

I plan to tune a K20-powered Honda Civic with a 75-hp shot from NOS.

The addition of the extra oxygen to the intake change represents a very real increase in load and volumetric efficiency I would have to treat this type of tuning as if it were a tuning like a turbo car and put a gas return system with a regulator and map sensor of more capacity to be able to compensate for that extra gasoline since I plan to use a dry system. I appreciate your help

Wet systems are so much easier, if you don't have the ability in the ECU to enable the NOS solenoid and add fuel at the same time. The wet systems do this for you automatically, so you just have to adjust the timing when the NOS is activated. What ECU are you using?

If you're running k pro or many standalones, you set it up to trigger a relay that powers a nitrous solenoid, and add fueling, pull timing, all at the same time.

On Kpro it's the Nitrous tab under Parameters, select nitrous control, pick an arming input, set up an available output, perhaps air conditioning clutch, and use that to power the nitrous solenoid. The conditions in the nitrous control setup can avoid spraying at too low an RPM, or too high (near/into rev limiter), stop spraying if the engine knocks, and has throttle and vehicle speed based gating as well.

One other thing to be mindful of is that very often system activation causes temporary spike in excessive oxygen content becase of difference in fuel and NOS pressure. Gas gets to combustion chamber a bit quicker than additional fuel so some small adjustment might be required for solenoids activation time compensations to solve lean AFR spike.