| Description_ASM |
Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information. |
| Description_DEF |
Engine Camshaft |
| Description_DES |
Thumpr 227/241 Hydraulic Flat Cam for Chevrolet Small Block |
| 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_INV |
Thumpr 227/241 Hyd Flat Cam SBC |
| Description_EXT |
High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle. |
| Description_SHP |
None |
| Description_SHO |
279TH7 |
| Advertised Intake Duration |
279 |
| Lobe Separation |
107 |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| Assembly Lubricant Included |
Yes |
| 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 On-Road Vehicles? |
No |
| Usage |
Street/Performance |
| Title |
Thumpr 227/241 Hydraulic Flat Cam for Chevrolet Small Block |
| Camshaft Material |
Cast Iron |
| Cam, Lifter and Gear Drive Upgrade |
GK12-600-4 |
| Lifter Type |
Hydraulic Flat Tappet |
| Camshaft Series |
Thumpr |
| Grind Number |
279TH7 |
| Exhaust Valve Lift |
0.465 |
| K-Kit Upgrade |
K12-600-4 |
| Intake Valve Lift |
0.479 |
| Valve Springs Required |
Yes |
| Camshaft Gear Attachment |
3-Bolt |
| Intake Duration at .050 Inch Lift |
227 |
| Amazon ASIN |
B001O0C4DQ |
| Cam Type |
Hydraulic Flat Tappet |
| Exhaust Duration at .050 inch Lift |
241 |
| Cam and Lifter Kit Upgrade |
CL12-600-4 |
| C.A.R.B. E.O. Number |
N/A |
| Basic Operating RPM Range |
2,000-5,800 |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? |
Yes, but must be a race/competition only vehicle. |
| Engine Family |
Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) |
| 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 Federally Certified Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exemption Reason |
N/A |
| Advertised Exhaust Duration |
297 |
| Lifters Included |
No |
| Length |
3.0000 |
| Width |
3.0000 |
| Height |
24.0000 |
| Weight |
9.0000 |
