Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
- PowerMax Hydraulic Flat Tappet Cam Only
- Lift: .456"/.484"
- Duration: 260°/272°
- RPM Range: 1200-4800
*Note: If your hydraulic lifter preload is excessive, this can be easily remedied by using Crane's rocker arm bridge shim kit 270-99179-1.**Note: 1985-90 307ci engines are 39° bank angle and are equipped with hydraulic roller camshafts and lifters. Lifter diameter is .921". Conventional hydraulic, mechanical, or roller camshafts and lifters can be installed in these engines if a thrust spacer is fabricated and the appropriate kit components are used.
***Note: Since 1975 General Motors divisions have exchanged engines throughout different models (ex. 350ci Chevy engines in Oldsmobile cars). Be certain of exactly which engine you have before ordering.
SMOOTH IDLE, DAILY USAGE, OFF ROAD, TOWING, ECONOMY, ALSO MILD TURBOCHARGED, 2200-2600 CRUISE RPM, 8.0 TO 9.5 COMPRESSION RATIO ADVISED.
Grind Number: H-260-2 (Replaces HMV-260-2) Operating Range: 1500-4500 RPM Duration Advertised: 260° Intake / 272° Exhaust Duration @ .050' Lift: 204° Intake / 216° Exhaust Valve Lift w/1.6 Rockers: .456' Intake / .484' Exhaust Lobe Separation Angle: 112° Max Lift Angle: 107° ATDC Intake / 117° BTDC Exhaust Open/Close @.050' Cam Lift: Intake - (5°) ATDC (opens) / 29° ABDC (closes)
Exhaust - 45° BBDC (opens) / (9°) BTDC (closes)
