Description
COMP Cams 11-600-20 – Nitrided Camshaft CB 279T H7
Thumpr NIT 227/241 Hydraulic Flat Cam for Chevrolet Big Block 396-454
High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle. Nitrided.
Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series’ early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes.
Camshaft Series: ThumprUsage: Street/StripCam Type: Hydraulic Flat TappetGrind Number: 279TH7Basic Operating RPM Range: 1,800-5,600Intake Duration at .050 Inch Lift: 227Exhaust Duration at .050 inch Lift: 241Advertised Intake Duration: 279Advertised Exhaust Duration: 296Lobe Separation: 107Intake Valve Lift: 0.498Exhaust Valve Lift: 0.483Lifters Included: NoValve Springs Required: YesAssembly Lubricant Included: YesCamshaft Gear Attachment: 3-BoltCamshaft Material: Nitrided Cast IronEngine Family: Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)Lifter Type: Hydraulic Flat TappetAmazon ASIN: B002EE6DNSC.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: Yes, but must be a race/competition only vehicle.C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: Yes, but must meet tailpipe emission standards for year of vehicle.C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.C.A.R.B. Exempt for On-Road Vehicles?: NoC.A.R.B. Exemption Reason: N/AC.A.R.B. E.O. Number: N/AGrind Number: 279TH7
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