I have a CC503 rest of mods in my sig and it peaked on the dyno at 5900 rpm and dropped off like a **** after 5900 i have 987-16 springs so i know its not valve float what are other users of this cam spinning thier motors too??Im at 80% duty cycle @4500 rpm and max 103% rpm @ 5900 rpm
but my A/F ratio gets richer all the way too 12.2 is this injector lockup causing a rich mixture????

 

ZachZ28 has a 503 cam you may ask him.