COMP Cams - 32-600-8
Camshaft - Thumpr - Hydraulic Roller - Lift 0.557 / 0.539 in - Duration 283 / 303 - 107 LSA - 1900 / 5600 RPM - Ford Cleveland / Modified - Each
COMP Cams Thumpr 283THR7 Retro-Fit Hydraulic Roller Camshaft for Ford 351 Cleveland, 351-400 Modified
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: Thumpr
Usage: Street/Performance
Cam Type: Hydraulic Roller
Grind Number: 283THR7
Basic Operating RPM Range: 1,900-5,600
Intake Duration at .050 Inch Lift: 227
Exhaust Duration at .050 inch Lift: 241
Advertised Intake Duration: 283
Advertised Exhaust Duration: 303
Lobe Separation: 107
Intake Valve Lift: 0.557
Exhaust Valve Lift: 0.539
Lifters Included: No
Valve Springs Required: Yes
Assembly Lubricant Included: No
Camshaft Gear Attachment: 1-Bolt
Camshaft Material: Austempered Ductile Iron
Engine Family: Ford 351C, 351M-400M 8 Cylinder (1970-1983)
Cam and Lifter Kit Upgrade: CL32-600-8
K-Kit Upgrade: K32-600-8
Lifter Type: Hydraulic Roller
Amazon ASIN: B0046ZHM2O
C.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?: No
C.A.R.B. Exemption Reason: N/A
C.A.R.B. E.O. Number: N/A
