In Cam advance???

[Nunook]

I know Ive seen it before, but if I use an exhaust cam on the intake side how much do i Have to advance on the cam pulley inorder to get in the correct spot?

Also what do u think is the maximum i can advance it? I want to seperate the lobes alittle so i widen the power band. (atleast thats the thought) Ill check the results on my jobs dyno, but Intake valves touching piston = bad....

thanks guys,