to tell you the truth my jr. technician j99jm really seems to be confused in the fact that you clearly state chiping to a DOHC and a chiped program optimizes ( not make run too rich) the feul curve and air fuel ratio and most programs also rasie the rev limter to around 9000+/- which is ideal for a built motor with CAMS right justin!!!!!!! god i love my JR tech j/j