COMP Cams #SK12-601-4 Mutha Thumpr
SMALL BLOCK CHEVY HYDRAULIC FLAT TAPPET CAM, LIFTER, AND TIMING CHAIN KIT
FOR SMALL BLOCK CHEVY 262-400, '55-'98 FACTORY NON-ROLLER BLOCK
INCLUDES
COMP Cams 12-601-4 MUTHA THUMPR CAMSHAFT
COMP Cams 812-16 HIGH ENERGY HYDRAULIC LIFTERS
AND COMP Cams #2100 MAGNUM TIMING CHAIN
MUTHA THUMPR™ – High performance street/strip
needs 9:1 Compression
2500+ Stall
Intake, gears and headers
Rough idle
Now available for hydraulic flat tappet applications, COMP Cams® new Thumpr Camshafts are the hottest cam series to hit the streets in more than a decade. Street rodders and muscle car enthusiasts just can’t get enough of the incredible exhaust sound and equally impressive performance delivered by these innovative camshafts. Applying a new camshaft design concept originally created for sports car endurance racing, the COMP Cams® engineering team incorporated early exhaust valve opening, long exhaust duration and a generous amount of intake and exhaust overlap to maximize your engine’s nasty-idling characteristics without negatively impacting power output or streetability.
Available for carbureted Small & Big Block Chevy, Ford 351 Windsor and Chrysler Small Block engines
Long exhaust duration & other design characteristics produce a “serious power” sound
Excellent hp gains & broad torque curve deliver real seat of the pants performance
THUMPR SBC CAMSHAFTS
HATED BY NEIGHBORS, ENVIED BY FRIENDS...
Musclecar Sound is back and nastier than ever; Thumpr Cams deliver incredible exhaust lope and impressive performance for your Small Block Chevy
|
PART
NUMBER
|
Valve Setting |
RPM
Range |
Cam Grind
Number |
Duration |
Valve Lift @ 1.5:1 |
Lobe Sep.
Angle |
|
Int. |
Ext. |
Adv. |
@.050" |
In. |
Ex. |
|
In. |
Ex. |
In. |
Ex. |
|
12-601-4 |
Hyd. |
Hyd. |
2200-6100 |
287THR7 |
287 |
305 |
235 |
249 |
.489 |
.476 |
107° |
COMP CAMS 812-16 HIGH ENERGY HYDRAULIC LIFTERS
Not all hydraulic lifters are created equal! The use of High Energy Hydraulic lifters gives you advantages not found in other brands of lifters
COMP Cams High Energy Hydraulic Lifters have a patented constant orifice metering valve that precisely meters oil to the rocker arms. Continuous contact between the metering valve and the precisely coined bottom surface of the pushrod seat is maintained throughout the engines rpm range, eliminating excessive oiling at high speeds. The pushrod seat is made of a special powdered metal iron alloy and heat treated for strength and wear resistance. COMP Cams High Energy Hydraulic Lifters are produced with a longer piston than conventional hydraulic lifters. The extra length is made possible from a counter-bored pushrod seat position. The longer piston is produced with through - hardened steel that provides more bearing surface, and increased lifter longevity
High Energy Lifters have a light weight CHECK valve disc that allows for quicker response. This results in increases in engine speed before valve float. This CHECK valve also maintains added control at all engine speeds and loads. Increases in engine speed can be attributed to this quicker response CHECK valve. Don’t take the chance of voiding cam warranties and losing power by using other brands of lifters!
