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Big Mutha' Thumpr 242/257 Hydraulic Flat Cam K-Kit for Oldsmobile 260-455

Big Mutha' Thumpr 242/257 Hydraulic Flat Cam K-Kit for Oldsmobile 260-455

Drag Race 250/256 Solid Flat Cam for Oldsmobile 260-455

Drag Race 250/256 Solid Flat Cam for Oldsmobile 260-455

Big Mutha' Thumpr 242/257 Hydraulic Flat Cam for Oldsmobile 260-455

$324.95
Big Mutha' Thumpr™ 242/257 Hydraulic Flat Cam for Oldsmobile 260-455. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
TEMPORARILY OUT OF STOCK
SKU
42-602-5
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More Information
UPC 036584213208
Manufacturer COMP Cams®
Emissions Code
Engine Family Oldsmobile 260-455 c.i. 8 Cylinder (1967-1990)
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 294
Advertised Exhaust Duration 312
Intake Duration at .050 Inch Lift 242
Exhaust Duration at .050 Inch Lift 257
Intake Valve Lift 0.512
Exhaust Valve Lift 0.497
Lobe Lift Intake 0.32
Lobe Lift Exhaust 0.311
Lobe Separation 107
Intake Centerline 102
Valve Timing Lift 0.006
Exhaust Close ATDC 49
Intake Open BTDC 43
Exhaust Open BBDC 84
Intake Close ABDC 71
Lifter Style Hydraulic Flat Tappet
Recommended Components
Component Part Number
CL-Kit Upgrade CL42-602-5
K-Kit Upgrade k42-602-5
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