RPM, I have been running a 660+ hp 358ci, yates headed cup style motor. The 660hp was with a 750 holly flowing 750cfm on the dyno. I have a 1050 cfm throttle body on it with 48 pound injectors so it could be making more power allthough as you know, there is no way to tell unless we dyno the motor. As for handling setup, I am running no rear bar with fairly light rear springs and stiffer up front. It has a pretty big push but that helps get the power down. You can watch the video in the all race talk section Road America.I have preached on this forum that the best way to buy a motor is from a competent builder that will dyno and break in the motor. I have only adjusted valves, changed plugs and
oil in 3 years. I am wondering about the valve springs. Our sessions are for 20 minutes, so they don't get thrashed for 2 hours and the rpm is only 8000. Your comments? Scott