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Technical Articles for Part Number CCA-K12-600-4
COMP Cams Thumpr Hydraulic Flat Tappet Cam and Lifter Kits K12-600-4
Part Number: CCA-K12-600-4
COMP Cams Thumpr Hydraulic Flat Tappet Cam and Lifter Kits
Camshaft/Lifter Set, Hydraulic Flat Tappet, Advertised Duration 279/297, Lift 0.479 in./0.465 in., for Gears and TC Upgrade, Small Block, Chevy, Kit
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Overview
Brand:
Manufacturer's Part Number:
K12-600-4
Part Type:
Product Line:
Summit Racing Part Number:
CCA-K12-600-4
UPC:
036584182214
Cam Style:
Hydraulic flat tappet
Basic Operating RPM Range:
2,000-5,800
Camshaft Use:
Street/Strip
Intake Duration at 050 inch Lift:
227
Exhaust Duration at 050 inch Lift:
241
Duration at 050 inch Lift:
227 int./241 exh.
Advertised Intake Duration:
279
Advertised Exhaust Duration:
297
Advertised Duration:
279 int./297 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.479 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.465 in.
Valve Lift with Factory Rocker Arm Ratio:
0.479 int./0.465 exh.
Lobe Separation (degrees):
107
Camshaft Gear Attachment:
3-bolt
Grind Number:
279TH7
Computer-Controlled Compatible:
No
Lifters Included:
Yes
Lifter Style:
Hydraulic flat tappet
Valve Springs Included:
Yes
Valve Spring Style:
Standard
Outside Diameter of Outer Spring (in.):
1.254 in.
Retainers Included:
Yes
Locks Included:
Yes
Valve Stem Seals Included:
Yes
Timing Chain and Gears Included:
Yes
Timing Chain Style:
Double roller
Assembly Lubricant Included:
Yes
Pushrods Included:
No
Rocker Arms Included:
No
Gaskets Included:
No
Valve Springs Required:
No
Quantity:
Sold as a kit.
COMP Cams Thumpr Hydraulic Flat Tappet Cam and Lifter Kits
COMP Cams is bringing the muscle car sound back, and it's nastier than ever! Let's face it--few things serve to grab our attention at a car show or cruise night more than a car with a thumping, high performance idle. In an ongoing quest to provide you with the performance and sound you demand, COMP Cams engineering team proudly introduces the Thumpr Series cam and lifter kits. The lobe profile and grind characteristics of these Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the cams. This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in different grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. Thumpr Series cam and lifter kits deliver a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance.
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