Comp Cams 12-600-8
"Thumpr" Retro-fit hydraulic roller camshaft.
Fits 1955-1998, 265-400 cu.in. Chevrolet V8.
The newest line of camshafts from Comp Cams is the "Thumpr". This retro-fit hydraulic roller cam is designed for use in engines that originally used a flat tappet cam. It will give a significant increase in horsepower over an identical flat tappet grind. The "Thumpr" uses lobe profiles and grind characteristics that produce an early valve opening, long exhaust duration, and a generous overlap to give the engine a powerful and hard hitting exhaust note and a rough idle without sacrificing power output or streetability.
RPM range: 1,900 to 5,600 rpm
Duration at .050" lift: 227/241 (int/exh)
Valve lift with 1.5 rockers: .513"/.498" (int/exh)
Good for high performance streetuse , best with 2000+ stall converter, has choppy idle.
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