My father taught me this. Bottom the screws...gently...then turn them out 1 1/2 turns. That gives you a great starting point. And SAIT taught patience. Turn them little by little evenly. Each time you turn them in or out even 1/4 turn, rev the engine up a bit and wait for it to settle. Patience is the key as always John. Of course it IS better if you have a four gas analyzer, but the ear gets them pretty darn close! LOL
2010 2SS/RS - 6M Silver Ice Metallic
ARH LT Headers with MBRP 3" catback exhaust, Cold Air Inductions CAI, ZL1 inspired splitter, ZL1 Grille, Rear Fascia blackout, Gill decals, Aftermarket Hurst Short Throw shifter, Tune by Jannetty Racing.