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Technical Articles for Part Number CCA-12-970-9
Camshaft, Mechanical Roller Tappet, Advertised Duration 312/325, Lift .679/.645, Chevy, Small Block, Each
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Estimated Ship Date from Georgia: Today Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
12-970-9
Part Type:
Product Line:
Summit Racing Part Number:
CCA-12-970-9
UPC:
036584065975
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Drag race
Basic Operating RPM Range:
5,000-7,500
Intake Duration at 050 inch Lift:
279
Exhaust Duration at 050 inch Lift:
286
Duration at 050 inch Lift:
279 int./286 exh.
Advertised Intake Duration:
312
Advertised Exhaust Duration:
325
Advertised Duration:
312 int./325 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.679 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.645 in.
Valve Lift with Factory Rocker Arm Ratio:
0.679 int./0.645 exh.
Lobe Separation (degrees):
108
Intake Valve Lash:
0.024 in.
Exhaust Valve Lash:
0.026 in.
Remanufactured:
No
Computer-Controlled Compatible:
No
Grind Number:
CS 312R-8 .900 BASE CIRCLE
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
This cam has a .900 in. base circle. Requires upgraded gear, thrust button, and wear plate. Designed for 400 c.i.d. and larger engines.
COMP Cams Drag Race Camshafts
COMP Cams drag race camshafts are offered in four styles: hydraulic flat tappet, hydraulic roller tappet, mechanical roller tappet, and mechanical flat tappet. These cams are ideal for the performance demands of the dragstrip, as well as street, strip, Circle Track, and other applications. Over a hundred models are available; choose the camshaft designed for your vehicle and engine family.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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