COMP Cams 24-602-5 Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chrysler 426 HEMI
by COMP Cams
SKU ds_BDQQ_24-602-5
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Original price
$526.45
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Original price
$526.45
Original price
$526.45
$526.45
$526.45
-
$526.45
Current price
$526.45
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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.
Resources
Installation InstructionsResources
Installation InstructionsSpecifications
| Advertised Exhaust Duration | 296 |
| Advertised Intake Duration | 279 |
| Amazon ASIN | B005H89UVA |
| Assembly Lubricant Included | Yes |
| Basic Operating RPM Range | 2,000-5,800 |
| 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 Type | Hydraulic Flat Tappet |
| Camshaft Gear Attachment | 3-Bolt |
| Camshaft Material | Cast Iron |
| Camshaft Series | Thumpr |
| Description_ASM | Fits Chrysler 426 HEMI |
| Description_DEF | Engine Camshaft |
| Description_DES | Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chrysler 426 HEMI |
| Description_EXT | Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. |
| Description_INV | Thumpr 243/257 Hyd Flat Cam 426 HEMI |
| Description_KEY | 383 |
| Description_KEY | 392 |
| Description_KEY | 426 |
| Description_KEY | 426 HEMI |
| Description_KEY | 440 |
| Description_KEY | B |
| Description_KEY | Barracuda |
| Description_KEY | Challenger |
| Description_KEY | Charger |
| Description_KEY | Coronet |
| Description_KEY | Cuda |
| Description_KEY | HEMI |
| Description_KEY | Plymouth |
| Description_KEY | RB |
| Description_KEY | Six Pack |
| Description_KEY | Wedge |
| 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 | BMT 243/257 HFT426 |
| Description_SHP | None |
| Engine Family | Chrysler 426 HEMI 8 Cylinder (1966-1971) |
| Exhaust Duration at .050 inch Lift | 241 |
| Exhaust Valve Lift | 0.478 |
| Grind Number | 295TH7 |
| height | 2.6 |
| Intake Duration at .050 Inch Lift | 227 |
| Intake Valve Lift | 0.508 |
| length | 24.0 |
| Lifter Type | Hydraulic Flat Tappet |
| Lifters Included | No |
| Lobe Separation | 107 |
| LTL | N |
| Title | Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chrysler 426 HEMI |
| Usage | Street/Strip |
| Valve Springs Required | Yes |
| weight | 9.789 |
| width | 3.1 |
