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Chevy SB Thumpr™ Retro-Fit Hydraulic Roller Camshaft Very Rough Idle
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Chevy SB Thumpr™ Retro-Fit Hydraulic Roller Camshaft Very Rough Idle



Part #: 12-602-8
List Price: $587.98
Our Price: $293.99
You Save: $293.99

Availability: In Stock



Chevy SB .531 lift, Thumpr™ III, Retro-Fit Hydraulic Roller Camshaft high performance street/Strip, needs 9.5:1 CR and 2800+ stall with lower gears and headers, extremely choppy idle.

RPM

Duration

Valve Lift

Lobe

Operating

Advertised

@ .050

@ 1.5:1

Sep.

Range

IN.

EX.

IN.

EX.

IN.

EX.

Angle

2500-6200

299

319

243

257

.531

.517

107°

;

Advertised Duration 299 int./319 exh.
Advertised Exhaust Duration 319
Advertised Intake Duration 299
Basic Operating RPM Range 2,500-6,200
Brand COMP Cams
Cam Style Hydraulic roller tappet
Computer-Controlled Compatible No
Duration at 050 inch Lift 243 int./257 exh.
Exhaust Duration at 050 inch Lift 257
Exhaust Valve Lash 0.000 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.517 in.
Grind Number 299THR7
Intake Duration at 050 inch Lift 243
Intake Valve Lash 0.000 in.
Intake Valve Lift with Factory Rocker Arm Ratio 0.531 in.
Lobe Separation (degrees) 107
Notes Designed for engines originally equipped with flat tappet camshaft.
Part Type Camshafts
Product Line COMP Cams Thumpr Retro-Fit Hydraulic Roller Camshafts
Quantity Sold individually.
Valve Lift with Factory Rocker Arm Ratio 0.531 int./0.517 exh. lift