| Part Number: | 168731 | Grind Number: | HR-226/345-2S-12 IG |
| Engine Identification: | | | | Start Yr. | End Yr. | Make | Cyl | Description | | 1996 | Up | CHEVROLET | 8 | FAIR IDLE, MODERATE PERFORMANCE USAGE, GOOD MID-RANGE TORQUE AND HP, MILD BRACKET RACING, AUTO TRANS W/2500+ CONVERTER, MILD MARINE PERF., 3000-3400 CRUISE RPM, 9.5 TO 11.0 COMP. RATIO ADV. BASIC RPM 2500-6000 | | Engine Size | Configuration | | | 454-502 C.I. | V | |
|
| Valve Setting: | Intake | .000 | Exhaust | .000 | HOT |
|
| Lift: | Intake @Cam | 345 | @Valve | 587 | All Lifts are based
on zero lash and theoretical rocker arm ratios. | | Exhaust @ Cam | 359 | @Valve | 610 | | Rocker Arm Ratio | 1.70 | | |
|
| CamTiming: | TAPPET | @.004 | | Lift: | | Opens | Closes | ADV Duration | | Intake | 33.0 BTDC | 75.0 ABDC | 288 | | Exhaust | 82.0 BBDC | 36.0 ATDC | 298 |
|
| Spring Requirements: Triple Dual Outer Inner | | Part Number | 99896 | | Loads | Closed | 132 | LBS@ | 1.906 | or | 1 29/32 | | Open | 405 | LBS@ | 1.326 | | |
| | Recommended RPM range with matching components | | Minimum RPM | 2500 | | Maximum RPM | 6000 | | Valve Float | 6500 |
|
| CamTiming: | TAPPET | @.050 | | Lift: | | Opens | Closes | Max Lift | Duration | | Intake | 6.0 BTDC | 40.0 ABDC | 107 | 226 | | Exhaust | 55.0 BBDC | 1.0 ATDC | 117 | 236 |
|
| Remarks: | | CRANE 16535-16 LONG TRAVEL HYDRAULIC ROLLER- LIFTERS MUST BE USED WITH GREATER THAN .570 LIFT CAMSHAFTS TO PREVENT ALIGNMENT BAR DISENGAGEMENT. |
|
Bell housings
Air & Fuel