I am going to be installing the hotcam kit and i was wondering what exactly has to be changed in the program,is it like rev limiter off,and fuel pres,air/fuel mix,What do these tuning guys like PCM forless change.Also i will be doing the heads aswell.

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94 Z28 M6 3.42'S,SLP CAI & TB AIR FOIL,SLP CLUTCH ASSY,MAC SHORTIES,BORLA C/B,HI FLOW CAT,160 STAT,TB BYPASS,SLP PULLEYS,EIBACH PRO KIT,LT4KM,HURST SHORT THROW,ALLUMINUM DRIVE SHAFT,17"ZR1 POLISHED WHEELS,F1 SPOILER,MORE TO COME...

 

Timing, and air fuel changes, and possibly raise the idle if you feel like it.

You should be able to find a free program on the net and use it as a baseline, then do WOT tuning on the dyno for AF.