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Crane Mechanical Roller Camshafts 138391

Crane Cams 138391 - Crane Mechanical Roller Camshafts

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Camshaft, Mechanical Roller Tappet, Advertised Duration 324/336, Lift .775/.740, Chevy, Big Block, Each

Estimated Ship Date: 1/26/2015 (if ordered today)

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Brand: Crane Cams

Manufacturer's Part Number: 138391

Part Type: Camshafts

Product Line: Crane Mechanical Roller Camshafts

Summit Racing Part Number: CRN-138391

UPC: 021174044782

Cam Style: Mechanical roller tappet

Basic Operating RPM Range: 5,000-8,600

Intake Duration at 050 inch Lift: 284

Exhaust Duration at 050 inch Lift: 296

Duration at 050 inch Lift: 284 int./296 exh.

Advertised Intake Duration: 324

Advertised Exhaust Duration: 336

Advertised Duration: 324 int./336 exh.

Intake Valve Lift with Factory Rocker Arm Ratio: 0.775 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.740 in.

Valve Lift with Factory Rocker Arm Ratio: 0.775 int./0.740 exh.

Lobe Separation (degrees): 114

Intake Valve Lash: 0.026 in.

Exhaust Valve Lash: 0.026 in.

Computer-Controlled Compatible: No

Grind Number: R-284/456-2S5-14

Valve Springs Required: Yes

Quantity: Sold individually.

Notes: Requires cam button spacer and a aluminum-bronze distributor drive gear. Also fits Rodeck 481 aluminum engines.

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!

Warranty

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

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