Part Number/Work Order Number 60919
Engine Application PONTIAC V8
Grind Number 304H
ADVERTISED CAMSHAFT SPECIFICATIONS:
INTAKE:
Duration: 304º
Lift: .469
Clearance Hot: .000
EXHAUST:
Duration: 316º
Lift: .469
Clearance Hot: .000
The specifications listed above are based on a rocker arm ratio of
1.50 IN
1.50 EX
RECOMMENDED VALVE SPRING INFORMATION:
Part #
Single
Dual
Triple
Approximate spring pressure:
valve closed: 150# LBS.
valve open: 350# LBS.
7.5 BTDC
4.0 ATDC
43.5 ABDC
56.0 BBDC
Timing Events
The information below is for degreeing cam only. Correct only at .050" tappet lift.
INTAKE
Opens: 7.5 BTDC
Closes: 43.5 ABDC
EXHAUST
Opens: 56.0 BBDC
Closes: 4.0 ATDC
LOBE SEPARATION 112º
Duration at .050"
Intake: 231º
Exhaust: 240º
LOBE LIFT
Intake: .313
Exhaust: .313
4 degrees of advance have been ground into this Camshaft.
If using "Lobe Center" method of degreeing, cam should be installed on an intake centerline of: 108º
NOTES:
Cams damaged by excessive spring pressure, over shimming, valve train bind or retainers contacting the
guides are void from warranty. Refer to the "Important Camshaft and Lift Information" booklet included
with each new Crower camshaft to avoid any break-in problems.
