| Part Number: | 111501 | Grind Number: | F-268/3814-2S-6 |
| Engine Identification: | | | | Start Yr. | End Yr. | Make | Cyl | Description | | 1957 | 1987 | CHEVROLET | 8 | COMPETITION ONLY, GOOD UPPER RPM TORQUE AND HP, BRACKET RACING; PRO, SUPER PRO, HOT ROD, ETC., AUTO TRANS W/ RACE CONVERTER, 12.0 MINIMUM COMPRESSION RATIO ADVISED. BASIC RPM 4600-8000 | | Engine Size | Configuration | | | 262-400 C.I. | V | |
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| Valve Setting: | Intake | .026 | Exhaust | .026 | HOT |
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| Lift: | Intake @Cam | 3814 | @Valve | 572 | All Lifts are based
on zero lash and theoretical rocker arm ratios. | | Exhaust @ Cam | 3934 | @Valve | 590 | | Rocker Arm Ratio | 1.50 | | |
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| CamTiming: | TAPPET | @.020 | | Lift: | | Opens | Closes | ADV Duration | | Intake | 46.0 BTDC | 78.0 ABDC | 304 | | Exhaust | 82.0 BBDC | 50.0 ATDC | 312 |
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| Spring Requirements: Triple Dual Outer Inner | | Part Number | 99893 | | Loads | Closed | 120 | LBS@ | 1.875 | or | 1 7/8 | | Open | 328 | LBS@ | 1.335 | | |
| | Recommended RPM range with matching components | | Minimum RPM | 4600 | | Maximum RPM | 8000 | | Valve Float | 9000 |
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| CamTiming: | TAPPET | @.050 | | Lift: | | Opens | Closes | Max Lift | Duration | | Intake | 31.0 BTDC | 57.0 ABDC | 102 | 268 | | Exhaust | 67.0 BBDC | 29.0 ATDC | 110 | 276 |
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Bell housings
Air & Fuel