| Part Number: | 119841 | Grind Number: | HR-296-2S-12 IG |
| Engine Identification: | | | | Start Yr. | End Yr. | Make | Cyl | Description | | 1957 | 1987 | CHEVROLET | 8 | ROUGH IDLE, PERFORMANCE USAGE, GOOD MID-RANGE HP, MILD BRACKET RACING, AUTO TRANS W/3000+ CONVERTER, 3800-4600 CRUISE RPM, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6500 | | Engine Size | Configuration | | | 262-400 C.I. | V | |
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| Valve Setting: | Intake | .000 | Exhaust | .000 | HOT |
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| Lift: | Intake @Cam | 359 | @Valve | 539 | All Lifts are based
on zero lash and theoretical rocker arm ratios. | | Exhaust @ Cam | 372 | @Valve | 558 | | Rocker Arm Ratio | 1.50 | | |
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| CamTiming: | TAPPET | @.004 | | Lift: | | Opens | Closes | ADV Duration | | Intake | 37.0 BTDC | 79.0 ABDC | 296.0 | | Exhaust | 85.0 BBDC | 39.0 ATDC | 304.0 |
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| Spring Requirements: Triple Dual Outer Inner | | Part Number | 99838 | | Loads | Closed | 110 | LBS@ | 1.688 | or | 1 11/16 | | Open | 348 | LBS@ | 1.148 | | |
| | Recommended RPM range with matching components | | Minimum RPM | 2500 | | Maximum RPM | 6000 | | Valve Float | 6500 |
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| CamTiming: | TAPPET | @.050 | | Lift: | | Opens | Closes | Max Lift | Duration | | Intake | 10.0 BTDC | 44.0 ABDC | 107 | 234.0 | | Exhaust | 58.0 BBDC | 4.0 ATDC | 117 | 242.0 |
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Bell housings
Air & Fuel