75 Hp to 100 HP jets, need tune?

Ajt · 03-25-2012, 05:57 PM

I have a 2005 GTO with cold air kit, exhaust, Diablo tune and added a Zex Nitrous system. I have been running 75 HP jets but want to try 100 HP. Directions say I need to retard timing 2 degrees. Wondering if I can get away without doing that. Anyone have any advice or experience.

PurpleGoat88 · 07-10-2012, 04:47 PM

First of all diablo says not to run their tune with nitrous. And I can't believe your engine hasn't blown up yet. The tuner ADVANCES timing to make more power! To run any sort of nitrous you should put a stock tune back on and then modify the stock tune to pull 2* of timing in the rpm ranges you'll be spraying. I haven't tried this yet but I've been told numerous times that anything but n/a should be professionally dyno tuned.