PONTIAC V8 CAMSHAFT HYD;
CRANE 283951 $114.95
Manufacturer
CRANE Part Number
283951
Description
<span class="ev_code_RED">Part Number: 283951 Grind Number: H-288-2 (REPLACES CCH-288-2)</span>
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1955 1981 PONTIAC 8 FAIR IDLE, MODERATE PERFORMANCE USAGE, GOOD MID-RANGE HP, MILD BRACKET RACING, AUTO TRANS W/2500+ CONVERTER, 3400-3800 CRUISE RPM, 9.5 TO 11.0 COMPRESSION RATIO ADVISED. BASIC RPM 2500-5500
Engine Size Configuration
265-455 C.I. V
Valve Setting: Intake .000 Exhaust .000 HOT
Lift: Intake @Cam 305 @Valve 458 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 315 @Valve 473
Rocker Arm Ratio 1.5
Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 29 BTDC 79 ABDC 288 °
Exhaust 81 BBDC 35 ATDC 296 °
Spring Requirements: Triple Dual Outer Inner
Part Number 99840
Loads Closed 90 LBS @ 1.578 or 1 37/64
Open 262 LBS @ 1.138
Recommended RPM range with matching components
Minimum RPM 2500
Maximum RPM 5500
Valve Float 6500
Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 4 BTDC 42 ABDC 109 226 °
Exhaust 56 BBDC (2) BTDC 119 234 °
Remarks:
THE MINIMUM CLEARANCE REQUIRED IS .040 BETWEEN THE RETAINER & ROCKER ARM WHEN VALVES ARE CLOSED.
283951
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"An over torqued bolt is already half broken"
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