Im in a slight debate with myself on throwing in a mild cam and having to replace the cam bearings.
I have a '90 20.5 Carrerra with a pretty much Stock Hardin Marine 454. I just put an Edelbrock RPM-Air Gap intake on it, and was thinking of adding the Edelbrock Performer RPM Cam Part # 7162 with an Edelbrock Spring Kit Part #5795 to go with the Holley 750 NON-DP. The engine has 390 hours on it. No issues with the motor, just want a little more out of the cam. Runs 4750rpm right now. Will I need to replace the cam bearings, or should I be ok just putting the new cam in?
Heres the Cam specs:
ENGINE: CHEVY 396-427-454 V8
RPM RANGE: 1500-6500
Duration at 0.006" Lift: Intake: 300° Exhaust: 306° Duration at 0.050" Lift: Intake: 240° Exhaust: 246° Lift at Cam: Intake: 0.330" Exhaust: 0.337" Lift at Valve: Intake: 0.560" Exhaust: 0.573" Timing at 0.050" lift: Open Close Intake: 10° BTDC 50° ABDC Exhaust: 59° BBDC 9° ATDC Centerlines: Lobe Separation - 112° Intake Centerline - 110°