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Part number: 12-970-9
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Product Details
Comp Cams 12-970-9 Drag Race .900 in. Base Circle
Products specifications
Advertised Duration 312 int./325 exh.
Advertised Exhaust Duration 325
Advertised Intake Duration 312
Basic Operating RPM Range 5,000-7,500
Cam Style Mechanical roller tappet
Computer-Controlled Compatible No
Duration at 050 inch Lift 279 int./286 exh.
Exhaust Duration at 050 inch Lift 286
Exhaust Valve Lash 0.026 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.645 in.
Grind Number CS 312R-8 .900 BASE CIRCLE
Intake Duration at 050 inch Lift 279
Intake Valve Lash 0.024 in.
Intake Valve Lift with Factory Rocker Arm Ratio 0.679 in.
Lobe Separation (degrees) 108
Notes This cam has a .900 in. base circle. Requires upgraded gear, thrust button, and wear plate.
Quantity Sold individually.
Valve Lift with Factory Rocker Arm Ratio 0.679 int./0.645 exh. lift
Valve Springs Required Yes
Title 12-970-9 CamShaft, CS 312R-8 .900 Base Circle
Engine Make/Size Chevy Small Block (262-400)
RPM Range 5000-13000
Usage Strip
Exh. Duration @ .050 in. (Deg) 286
Exh. Duration Advertised (Deg) 325
Exhaust Valve Lift (in.) 0.645
Int. Duration @ .050 in. (Deg) 279
Int. Duration Advertised (Deg) 312
Intake Valve Lift (in.) 0.679
Lifter Type Mechanical Roller
  • Drag Race Xtreme RX Camshaft
  • 1 Year Limited Warranty
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