Oval Track 255/264 Solid Roller Cam for Chevrolet Small Block

MECHANICAL ROLLER-3/8 - 1/2 Tacky. 355-406 Late model. 4BBL. Good top end.

SKU
12-858-9
$374.98

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.

Grind Number: 283TKBR-6
Engine Family: Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
RPM Operating Range: 3500-7,500
Cam Type: Solid Roller
Lifter Style: Solid Roller
Camshaft Series: Oval Track Xtreme TK
Camshaft Gear Attachment: 3-Bolt
Usage: Strip
Valve Springs Required: Yes
Camshaft Material: Billet Steel
California Proposition 65: WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Advertised Intake Duration: 283
Advertised Exhaust Duration: 296
Intake Duration at .050 Inch Lift: 255
Exhaust Duration at .050 Inch Lift: 264
Intake Valve Lift: 0.645
Exhaust Valve Lift: 0.63
Lobe Separation: 106
Assembly Lubricant Included: No
Valve Timing @ 0.02 Lift:
Exhaust Close ATDC: 22
Exhaust Open BBDC: 61
spec-card-valve-timing
Intake Open BTDC: 26
Intake Close ABDC: 49
Note Description
14Requires upgraded gear, thrust button & wear plate
46Must use bronze tip fuel pump pushrod when using high pressure or high volume pump
Component Part Number
Break-In Lube: 159
Distributor Gears: 12200  /   412
Lifter Kit: 818-16
Rev Kit: 4000
Steel Retainers: 731-16  /   733-16
Timing Set: 3100KT
Valve Locks: 611-16
Valve Seals: 503-16
Valve Springs: 26089-16  /   26099-16