COMP Cams 12-601-4 Mutha Thumpr Cam, Small Block Chevy, 2200-6100 RPM
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Have you ever been to the races and heard how nasty the cams sound? COMP Cams has developed the Thumpr series of cams that give you every day drivability, but have that nasty race engine sound. Pick the cam that fits your application, add a set of Comp Cam hydraulic lifters and you will be the talk of the town.
High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.
Thumpr Application Chart (GIF)
282-126014 Specs (PDF)
- Stock springs cannot be used
- 50-State legal on ‘93 & earlier S.B. Chevrolet V8, 262-400 c.i.
- RPM range: 2200-6100
- Valve timing: .006
- Lobe-center angle: 107
- Intake centerline: 102
- Valve lash: intake/exhaust - hydraulic
- Duration: 287 intake, 305 exhaust
- Duration @ .050" life: 235 intake, 249 exhaust
- Valve lift: .489 intake, .476 exhaust
- Lobe lift: .327 intake, .317 exhaust
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Q & A
What happens when you advance or retard a camshaft? In this tech article, we explain the pros and cons of installing your cam straight up, advancing or retarding.
Learn the basics to engine performance like; how does a cam work? What is Valve lift, duration, lobe separation angle, and cam profiles? Afterwords selecting the right camshaft will be less of a guessing game!