We use cookies to provide you with the best possible user experience. By continuing to use our site, you agree to their use. To learn more, view our Cookie Policy.
Classic Big Mutha Thumpr 227/241 Hydraulic Flat Cam Buick 364, 401, 425 Nailhead
Classic Big Mutha Thumpr™ 227/241 Hydraulic Flat Cam Buick 364, 401, 425 Nailhead. Street/strip needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Available Soon
SKU
91-602-5
TEMPORARILY OUT OF STOCK, ORDER NOW!
$408.56
$453.95
Engine Family: Buick Nailhead 364, 401, 425 c.i. 8 Cylinder (1957-1966)
RPM Operating Range: 2,500-6,400
Grind Number: 295TH7
Cam Type: Hydraulic Flat Tappet
Lifter Style: Hydraulic Flat Tappet
Camshaft Series: Classic Thumpr
Usage: Street/Strip
California Proposition 65: WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Advertised Intake Duration: 287
Advertised Exhaust Duration: 305
Intake Duration at .050 Inch Lift: 235
Exhaust Duration at .050 Inch Lift: 249
Intake Valve Lift: 0.49
Exhaust Valve Lift: 0.475
Lobe Lift Intake: 0.334
Lobe Lift Exhaust: 0.324
Lobe Separation: 107
Intake Centerline: 102
Exhaust Close ATDC: 49
Intake Open BTDC: 44
Exhaust Open BBDC: 84
Intake Close ABDC: 71
Component
Part Number
Break-In Lube: 159
