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Thumpr Hydraulic Flat Tappet Camshaft <br> 66-91 American Motors 290-401
Description:
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.
Features:
Camshaft Series: Thumpr
Lobe Separation: 107 DD
Intake Valve Lift: 0.491 IN
Exhaust Valve Lift: 0.476 IN
Lifters Included: No
Valve Springs Required: Yes
Assembly Lubricant Included: Yes
Camshaft Gear Attachment: 1-Bolt
Camshaft Material: Cast Iron
Engine Family: American Motors 290-401 c.i. 8 Cylinder (1966-1991)
Cam and Lifter Kit Upgrade: CL10-600-5
Usage: Street/Strip
K-Kit Upgrade: K10-600-5
Lifter Type: Hydraulic Flat Tappet
Cam Type: Hydraulic Flat Tappet
Grind Number: 279TH7
Grind Number: 279TH7
Basic Operating RPM Range: 2,000-5,800
Intake Duration at .050 Inch Lift: 227 DD
Exhaust Duration at .050 inch Lift: 241 DD
Advertised Intake Duration: 279 DD
Advertised Exhaust Duration: 296 DD
Package Includes:
Engine Camshaft
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.
Features:
Package Includes:
$119.68
Original: $341.95
-65%Thumpr Hydraulic Flat Tappet Camshaft <br> 66-91 American Motors 290-401—
$341.95
$119.68
Description
Description:
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.
Features:
Camshaft Series: Thumpr
Lobe Separation: 107 DD
Intake Valve Lift: 0.491 IN
Exhaust Valve Lift: 0.476 IN
Lifters Included: No
Valve Springs Required: Yes
Assembly Lubricant Included: Yes
Camshaft Gear Attachment: 1-Bolt
Camshaft Material: Cast Iron
Engine Family: American Motors 290-401 c.i. 8 Cylinder (1966-1991)
Cam and Lifter Kit Upgrade: CL10-600-5
Usage: Street/Strip
K-Kit Upgrade: K10-600-5
Lifter Type: Hydraulic Flat Tappet
Cam Type: Hydraulic Flat Tappet
Grind Number: 279TH7
Grind Number: 279TH7
Basic Operating RPM Range: 2,000-5,800
Intake Duration at .050 Inch Lift: 227 DD
Exhaust Duration at .050 inch Lift: 241 DD
Advertised Intake Duration: 279 DD
Advertised Exhaust Duration: 296 DD
Package Includes:
Engine Camshaft
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.
Features:
Package Includes:
