Smart Home Essentials: Elevating Comfort and Cleanliness with High-Tech Household Gadgets
Smart Home Essentials: Elevating Comfort and Cleanliness with High-Tech Household Gadgets Smart Home Essentials: Elevating Comfort and Cleanliness with High-Tech Household Gadgets
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COMP Cams 08-601-8 Mutha' Thumpr 235/249 Hydraulic Roller Cam for OE Roller SBC

COMP Cams 08-601-8 Mutha' Thumpr 235/249 Hydraulic Roller Cam for OE Roller SBC

$ 58.80

$ 76.44

Unavailable
COMP Cams 08-601-8 Mutha' Thumpr 235/249 Hydraulic Roller Cam for OE Roller SBC

COMP Cams 08-601-8 Mutha' Thumpr 235/249 Hydraulic Roller Cam for OE Roller SBC

$ 58.80

$ 76.44

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Product Details

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.
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Specifications:

Advertised Exhaust Duration 311
Advertised Intake Duration 291
Amazon ASIN B002EDZVUU
Assembly Lubricant Included No
Basic Operating RPM Range 1,900-5,600
C.A.R.B. E.O. Number N/A
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 Federally Certified Vehicles Manufactured Before 1967? 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. Exempt for Racing and Off-Road Only Vehicles? Yes, but must be a race/competition only vehicle.
C.A.R.B. Exemption Reason N/A
California Proposition 65 WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Cam and Lifter Kit Upgrade CL08-601-8
Cam Type Hydraulic Roller
Camshaft Gear Attachment 3-Bolt
Camshaft Material Austempered Ductile Iron
Camshaft Series Thumpr
Description_ASM Fits '87 GEN 1 Chevrolet 305-350 Small Blocks w/ Factory Roller Camshafts (Not LT-1/LS1 etc)
Description_DEF Engine Camshaft
Description_DES Mutha' Thumpr 235/249 Hydraulic Roller Cam for OE Roller SBC
Description_EXT High performance street/strip, needs 9:1 compression, 2500 stall, intake, gears and headers, rough idle.
Description_INV M-Thmpr 235/249 H-Rolr Cam OE Roller SBC
Description_KEY 265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10
Description_MKT 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.
Description_SHO MT 235/249 HRlrSBC
Description_SHP None
Engine Family Chevrolet 305-350 c.i. 8 Cylinder O.E. Roller (1987-1998)
Exhaust Duration at .050 inch Lift 249
Exhaust Valve Lift 0.509
Grind Number 291THR7
height 2.59
Intake Duration at .050 Inch Lift 235
Intake Valve Lift 0.522
K-Kit Upgrade K08-601-8
length 23.22
Lifter Type Hydraulic Roller
Lifters Included No
Lobe Separation 107
LTL N
Title Mutha' Thumpr 235/249 Hydraulic Roller Cam for OE Roller SBC
Usage Street/Strip
Valve Springs Required Yes
weight 8.65
width 2.83

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