Xtreme Energy 242/248 Solid Roller Cam for Chevrolet Big Block 396-454

Xtreme Energy™ 242/248 Solid Roller Cam for Chevy Big Block 396-454. Best in street machines. 10:1+ Compression, 3.73-3.90 rear gear with a 2800+ stall.

BBC - 1965-66 396 c.i. 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: XR280R
Engine Family: Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
RPM Operating Range: 2,500-6,500
Cam Type: Solid Roller
Lifter Style: Solid Roller
Camshaft Series: Xtreme Energy
Camshaft Gear Attachment: 3-Bolt
Usage: Street/Performance
Valve Springs Required: Yes
Camshaft Material: Austempered Ductile Iron
California Proposition 65: WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Advertised Intake Duration: 280
Advertised Exhaust Duration: 286
Intake Duration at .050 Inch Lift: 242
Exhaust Duration at .050 Inch Lift: 248
Intake Valve Lift: 0.646
Exhaust Valve Lift: 0.653
Lobe Separation: 110
Assembly Lubricant Included: No
Valve Timing @ 0.015 Lift:
Exhaust Close ATDC: 29
Exhaust Open BBDC: 77
Intake Open BTDC: 34
Intake Close ABDC: 66
Note Description
10Requires 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
CL-Kit Upgrade: CL11-771-8
Distributor Gears: 412M
K-Kit Upgrade: K11-771-8
Lifter Kit: 819-16
SK-Kit Upgrade: SK11-771-8
Steel Retainers: 729-16  /   741-16
Timing Set: 2110  /   7110
Valve Locks: 612-16
Valve Seals: 505-16
Valve Springs: 933-16  /   953-16