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Crane Mechanical Roller Camshafts 138771

Crane Cams 138771 - Crane Mechanical Roller Camshafts

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Camshaft, Mechanical Roller Tappet, Advertised Duration 326/352, Lift .833/.810, Chevy, Big Block, Each

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Estimated Ship Date: 10/20/2014 (if ordered today) Would you rather pick it up? Select Location

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Brand: Crane Cams
Manufacturer's Part Number: 138771
Part Type: Camshafts
Summit Racing Part Number: CRN-138771

UPC: 021174127201
Cam Style: Mechanical roller tappet
Basic Operating RPM Range: 5,000-8,400
Intake Duration at 050 inch Lift: 286
Exhaust Duration at 050 inch Lift: 306
Duration at 050 inch Lift: 286 int./306 exh.
Advertised Intake Duration: 326
Advertised Exhaust Duration: 352
Advertised Duration: 326 int./352 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.833 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.810 in.
Valve Lift with Factory Rocker Arm Ratio: 0.833 int./0.810 exh.
Lobe Separation (degrees): 114
Camshaft Gear Attachment: 3-bolt
Intake Valve Lash: 0.026 in.
Exhaust Valve Lash: 0.030 in.
Computer-Controlled Compatible: No
Grind Number: R-286/490-2S1-14 SFO
Valve Springs Required: Yes
Quantity: Sold individually.
Notes: Cam has 4/7 swap firing order.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

Crane's mechanical roller camshafts are not for the weak of heart. These camshafts are engineered for operation at ranges that can exceed 10,000 rpm and are the perfect blend of performance and efficiency. While a large number of mechanical roller cams are used in purely competition applications, Crane also manufactures less severe roller grinds that are designed for high performance street engines that have higher compression or power-adders. (For best results, the valve lash must be checked and set periodically.) Crane Cams has the industry's largest database of camshaft profiles. This enables Crane to provide you with camshafts that are ideally suited for your application. If you have a power-eating mean machine, Crane has the perfect camshaft for you!


Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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