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Part Number: 109651 Grind Number: HR-302-2S-10.04 IG
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1987 Up CHEVROLET 8 ROUGH IDLE, PERFORMANCE USAGE, GOOD UPPER RPM TORQUE AND HP, BRACKET RACING, AUTO TRANS W/3500+ CONVERTER, 4200-5000 CRUISE RPM, 10.5 TO 12.0 COMPRESSION RATIO ADVISED, 370+ CU. IN., SUPERCHARGED AND/OR NITROUS, 1.040" BASE CIRCLE FOR LONG STROKE CLEARANCE. BASIC RPM 3500-7000
Engine Size Configuration
305-350 C.I. V
Valve Setting: Intake .000 Exhaust .000 HOT
Lift: Intake @Cam 372 @Valve 558 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 372 @Valve 558
Rocker Arm Ratio 1.50
Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 42.0 BTDC 80.0 ABDC 302 °
Exhaust 84.0 BBDC 42.0 ATDC 306 °
Spring Requirements: Triple Dual Outer Inner
Part Number 99846
Loads Closed 125 LBS @ 1.800 or 1 13/16
Open 321 LBS @ 1.350
Recommended RPM range with matching components
Minimum RPM 3200
Maximum RPM 7200
Valve Float 7200
Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 15.0 BTDC 45.0 ABDC 105 240 °
Exhaust 57.0 BBDC 7.0 ATDC 115 244 °
Remarks:
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1993 z28 Camaro
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