Oval Track 256/258 .900 Base Circle Solid Roller Cam for Chevrolet Small Block

MECHANICAL ROLLER-Good for 1/4 to 3/8 mile tacky tracks with tight corners.

In stock
SKU
12-991-9
$505.95

SBC - 1955-57 models have an oiling groove in the rear journal. The listed part numbered cams will not fit these models, so if you require a camshaft with the oiling groove, please call us at 1-800-999-0853 or click here to contact us, and we will assist you with placing an order.

  • Warning: Camshaft Optimized for use with a Melanized or Nitrided distributor gear. Not compatible with cast or steel gears without similar surface treatments. Failure to utilize the proper distributor gear will void all warranties and/or return policies.

  • Engine Family: Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
    RPM Operating Range: 3,500-6,500
    Grind Number: 292AR-6
    Cam Type: Solid Roller
    Lifter Style: Solid Roller
    Camshaft Series: Oval Track (.900" Base Circle)
    Usage: Strip
    California Proposition 65: WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
    Advertised Intake Duration: 292
    Advertised Exhaust Duration: 296
    Intake Duration at .050 Inch Lift: 256
    Exhaust Duration at .050 Inch Lift: 258
    Intake Valve Lift: 0.63
    Exhaust Valve Lift: 0.63
    Lobe Separation: 106
    Exhaust Close ATDC: 42
    Intake Open BTDC: 40
    Exhaust Open BBDC: 74
    Intake Close ABDC: 72
    Camshaft Gear Attachment: 3-Bolt
    Note Description
    1414
    4646
    Component Part Number
    Break-In Lube: 159
    Distributor Gears: 12200  /   412
    Lifter Kit: 891-16
    Steel Retainers: 731-16  /   720-16
    Timing Set: 3100KT
    Valve Locks: 611-16
    Valve Seals: 503-16
    Valve Springs: 943-16  /   26089-16