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Thumpr Hydraulic Roller 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: 0.552 IN
Exhaust Valve Lift: 0.537 IN
Lifters Included: No
Valve Springs Required: Yes
Assembly Lubricant Included: No
Camshaft Gear Attachment: 1-Bolt
Camshaft Material: Billet Steel
Engine Family: American Motors 290-401 c.i. 8 Cylinder (1966-1991)
Usage: Street/Performance
Lifter Type: Hydraulic Roller
Cam Type: Hydraulic Roller
Grind Number: 299THR7
Grind Number: 299THR7
Basic Operating RPM Range: 2,500-6,400
Intake Duration at .050 Inch Lift: 243 DD
Exhaust Duration at .050 inch Lift: 257 DD
Advertised Intake Duration: 299 DD
Advertised Exhaust Duration: 319 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:
$202.98
Original: $579.95
-65%Thumpr Hydraulic Roller Camshaft <br> 66-91 American Motors 290-401—
$579.95
$202.98
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: 0.552 IN
Exhaust Valve Lift: 0.537 IN
Lifters Included: No
Valve Springs Required: Yes
Assembly Lubricant Included: No
Camshaft Gear Attachment: 1-Bolt
Camshaft Material: Billet Steel
Engine Family: American Motors 290-401 c.i. 8 Cylinder (1966-1991)
Usage: Street/Performance
Lifter Type: Hydraulic Roller
Cam Type: Hydraulic Roller
Grind Number: 299THR7
Grind Number: 299THR7
Basic Operating RPM Range: 2,500-6,400
Intake Duration at .050 Inch Lift: 243 DD
Exhaust Duration at .050 inch Lift: 257 DD
Advertised Intake Duration: 299 DD
Advertised Exhaust Duration: 319 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:
