Originally Posted by
TriPinTaZ
Yes, the VCP spark only adds based on multiplier tables and when the cam moves. If the cam isn't moving then it's not adding from the VCP spark table. But that also means you don't need that much spark advance back. Remember, the cam movement value is retard degrees, so the more retard you have the more timing you can run to keep the combustion in the correct area or time of event. The VCP table isn't an absolute adder, its a value that is applied to a multiplier and that sum is to account for the cam retard to keep combustion in the correct area. The base table has pretty high base timing in the cruise area on Corvette's and Camaro's(40-50 degrees). You won't need to add anything to the base table by disabling VCP and Cam movement at part throttle on those cars. But you can if you need to a mid load areas if you find drive-ability needs it. I usually adjust the area of moderate throttle right before you enter PE mode as the CAM will start to move from 0 degrees of commanded retard as you go WOT.