Quote: The Lunati 303 is one of the larger of the Voodoo cams, which have quick ramps. That's why I say springs. The OP didn't build the heads himself so he doesn't know what they are.
Quick ramps require a stiff spring
Quote:
Quote: and hemi race springs what ever that means. they are single with dampners.
My buddy had those springs on his '68 Pure Stock Hemi, it fell on it's face at 5,300 RPM's, changed to a different spring, now it will go 6,000 no problem.
it would appear as though the springs may be the issue, some of the things I suggested earlier are fairly easy things to check and can definitely cause the problem described. if the two above quotes are factual then the springs are probably at fault.
