Description_ASM |
Fits Chrysler 273, 318, 340 and 360 LA |
Description_DEF |
Engine Camshaft |
Description_DES |
Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chrysler 273-360 |
Description_INV |
BM-Thmpr 243/257 H-Flt Cam Chrys 273-360 |
Description_EXT |
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. |
Description_KEY |
273, 360, 318, AMC, Dodge, Mopar, Plymouth, Dart, Road Runner, Charger, Challenger, 383, 400, 440, 426, HEMI, 426 Wedge, 426 HEMI, RB, B, HEMI, 392, Chrysler, LA |
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 HFTChrLA |
Description_SHP |
None |
Advertised Intake Duration |
295 |
Amazon ASIN |
B002EE0FK0 |
Engine Family |
Chrysler 273-360 c.i. 8 Cylinder (1964-2002) |
Cam and Lifter Kit Upgrade |
CL20-602-4 |
Camshaft Material |
Cast Iron |
Advertised Exhaust Duration |
313 |
Assembly Lubricant Included |
Yes |
Valve Springs Required |
Yes |
Title |
Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chrysler 273-360 |
Intake Valve Lift |
0.507 |
Basic Operating RPM Range |
2,500-6,400 |
Grind Number |
295TH7 |
Exhaust Duration at .050 inch Lift |
257 |
Cam Type |
Hydraulic Flat Tappet |
Exhaust Valve Lift |
0.494 |
K-Kit Upgrade |
K20-602-4 |
Intake Duration at .050 Inch Lift |
243 |
C.A.R.B. Exempt for On-Road Vehicles? |
No |
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. Exemption Reason |
N/A |
Camshaft Series |
Thumpr |
Usage |
Street/Strip |
California Proposition 65 |
WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
Lifters Included |
No |
Camshaft Gear Attachment |
1-Bolt |
C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
Lifter Type |
Hydraulic Flat Tappet |
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. |
Lobe Separation |
107 |
C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? |
Yes, but must be a race/competition only vehicle. |
Length |
3.0000 |
Width |
3.0000 |
Height |
25.0000 |
Weight |
10.0000 |