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Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Small Block 262-400
Big Mutha' Thumpr™ 243/257 Hydraulic Flat Cam for Chevrolet Small Block 262-400. Street/strip, needs 9.5:1 compression, 2800+ stall, intake gears and headers, very rough idle.
In stock
SKU
12-602-4
$245.66
$272.95
Engine Family: Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
RPM Operating Range: 2,500-6,400
Grind Number: 295TH7
Cam Type: Hydraulic Flat Tappet
Lifter Style: Hydraulic Flat Tappet
Camshaft Series: Thumpr
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: 0.5
Exhaust Valve Lift: 0.486
Lobe Separation: 107
Exhaust Close ATDC: 49
Intake Open BTDC: 44
Exhaust Open BBDC: 84
Intake Close ABDC: 71
Camshaft Gear Attachment: 3-Bolt
Component
Part Number
Break-In Lube: 159
Cam and Lifter and Gear Drive Upgrade: GK12-602-4
CL-Kit Upgrade: CL12-602-4
K-Kit Upgrade: K12-602-4
Rocker Arms: 1412-16
Valve Locks: 611-16
Valve Seals: 503-16
