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Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Pontiac 265-455

$314.95
Big Mutha' Thumpr™ 243/257 Hydraulic Flat Cam for Pontiac 265-455. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
In stock
SKU
51-602-5
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More Information
UPC 036584213260
Manufacturer COMP Cams®
Emissions Code
Engine Family Pontiac 265-455 c.i. 8 Cyl. (1955-1981)
RPM Operating Range 2,500-6,400
Cam Type Hydraulic Flat Tappet
Camshaft Series Thumpr
Camshaft Gear Attachment 1-Bolt
Usage Street/Strip
California Proposition 65 WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Advertised Intake Duration 295
Advertised Exhaust Duration 313
Intake Duration at .050 Inch Lift 243
Exhaust Duration at .050 Inch Lift 257
Intake Valve Lift 0.501
Exhaust Valve Lift 0.486
Lobe Lift Intake 0.334
Lobe Lift Exhaust 0.324
Lobe Separation 107
Intake Centerline 102
Valve Timing Lift 0.006
Exhaust Close ATDC 49
Intake Open BTDC 44
Exhaust Open BBDC 84
Intake Close ABDC 71
Lifter Style Hydraulic Flat Tappet
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