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COMP Cams Drag Race Mechanical Roller Camshaft Lift: .630" /.630" Duration: 300/308 RPM Range: 4200-7200

COMP Cams 12-908-9

249-12-908-9

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COMP Cams Drag Race Mechanical Roller Camshaft Lift: .630" /.630" Duration: 300/308 RPM Range: 4200-7200 $324.99
Drag Race Mechanical Roller Camshaft
Lift: .630''/.630''
Duration: 300/308
RPM Range: 4200-7200

COMP Cams 12-908-9 Details

Chevy 262-400ci Small Block 1955-98

*Note: In order to use these camshafts in 1955-57 265ci blocks, it is necessary to machine a small groove in the rear main journal of the cam to allow oil flow to the top of the engine.

**Note: Requires bronze gear, thrust button & wear plate.

4500 stall converter, 11:1 compression, good power.

Operating Range:4200-7200 RPM
Duration Advertised:300° Intake / 308° Exhaust
Duration @ .050'' Lift:264° Intake / 270° Exhaust
Valve Lift w/1.5 Rockers:.630'' Intake / .630'' Exhaust
Valve Setting:.026'' Intake / .028'' Exhaust
Lobe Separation Angle:106°

Specifications:

Exhaust Valve Lift (in.)
0.63
Intake Valve Lift (in.)
0.630
Int. Duration @ .050 in. (Deg)
264
Exh. Duration @ .050 in. (Deg)
270
Int. Duration Advertised (Deg)
300-5
Exh. Duration Advertised (Deg)
308-6
RPM Range
4200-7200
Engine Make/Size
Chevy Small Block (262-400)
Lifter Type
Mechanical Roller
Usage
Strip
Advertised Duration
300 int./308 exh.
Advertised Exhaust Duration
308
Advertised Intake Duration
300
Basic Operating RPM Range
4,200-7,200
Cam Style
Mechanical roller tappet
Computer-Controlled Compatible
No
Duration at 050 inch Lift
264 int./270 exh.
Exhaust Duration at 050 inch Lift
270
Exhaust Valve Lash (in.)
0.028
Exhaust Valve Lift with Factory Rocker Arm Ratio (
0.63
Grind Number
CS 300B-R6
Intake Duration at 050 inch Lift
264
Intake Valve Lash (in.)
0.026
Intake Valve Lift with Factory Rocker Arm Ratio (i
0.63
Quantity
Sold individually
Valve Lift with Factory Rocker Arm Ratio
0.630 int./0.630 exh.
Valve Springs Required
Yes
Lobe Separation (Deg)
106
Manufacturer's Part Number:
12-908-9

Roller Cam For On Demand Power

Camshafts specifically designed for use in all ''Super'' catagory cars, especially those equipped with throttle stops. These powerful Comp Cams offer crisp, immediate throttle response and excellent repeatability, plus are relatively easy on valve train parts.

Features:
  • Wide assortment of racing camshafts for all application requirements of drag, oval track and puller & mud competitors
  • Require accurate assessment of rear end gearing and other vehicle-based equipment to deliver top performance
  • Not made for street use or vehicles requiring accessory drive equipment, such as power brakes, air conditioning, etc.

    Small Kits are indicated by a SK in their part number and include Camshaft, Lifters, Timing Chain Set, Assembly Lube, Decals, and Instructions.

  • I’m installing this particular cam I have a set of springs already in heads for the hyd cam duration was 305 can anyone tell me which set of springs would work for this 630 lift solid roller cam please 

    Asked by: KALICO
    These are the recommended springs for your camshaft. https://www.jegs.com/i/COMP-Cams/249/954-16/10002/-1
    Answered by: Rusty B
    Date published: 2018-06-25
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