Originally Posted by dvw
I agree that Ti is easier on the valve train. Consider the valve train being stable at the RPM of max power. I don't see any reason that it'll make power at a higher RPM. If the port/cam/intake combo is done at a given RPM, its done. Thoughts?
Doug


I agree with this. Possible the CSA is not large enough and the ports are going supersonic. Are the ports in the spacers angled correctly or straight through?