Nitrous System and Hypertech

[etz28]

Hello Guys:
During this weekend I will be installing a Nitrous Works System (also Hotchkis rear suspension) on my 97 Z28 and I will like to know if the Hypertech Program can be left on the car computer or I need to remove it before using the nitrous system. Some folks told me that the programmer can hurt the engine (forward the timing). Thanks...

[Injuneer]

The HPP "power programming" adds little (if anything), so I wouldn't risk leaving it in there with anything over a 100-shot. You can keep the reduced fan on/off temps, but ditch the "power program". They probably didn't add too much timing, because the stock programming is already fairly aggressive, but why take a chance with anything over a 100-shot.

The alternative would be to simply add a timing retard box, so that if you feel you are getting any value out of the HPP power progamming running N/A, you could keep it, with the retard applied when you spray.

I notice you also have the Granatelli MAF. That is basically a stock MAF sensor with the electronics altered to make the sensor under-report the air flow, in an attempt to lean out the WOT A/F ratio, to compensate for the excessively rich PE target A/F ratio in the stock program. I think their electronic "alteration" is so crude that it only works in about 1/2 the cases, but in any event, if that is leaning out your A/F ratio at WOT, you need to watch your fuel jet selection very carefully when you set up your nitrous. Personally, I would not use the HPP power programming or the MAF on a relatively stock setup.