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COMP Cams 11-721-9

Drag Race Mechanical Roller Camshaft Lift .775"/.748" Duration 324/332 RPM Range 5200-7500

COMP Cams 11-721-9

249-11-721-9

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Ships 12/12/16 if Ordered Today
COMP Cams 11-721-9 Drag Race Mechanical Roller Camshaft Lift .775"/.748" Duration 324/332 RPM Range 5200-7500 $331.99
Drag Race Mechanical Roller Camshaft
Lift .775"/.748"
Duration 324/332
RPM Range 5200-7500

COMP Cams 11-721-9 Details

Chevy 396-454ci Big Block 1965-96

*Note: In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16'' wide x 7/64'' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.

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

Super Gas / Super Comp, 5000 stall converter or 4-speed manual, 500+ ci

Operating Range:5200-7500 RPM
Duration Advertised:324° Intake / 332° Exhaust
Duration @ .050'' Lift:284° Intake / 292° Exhaust
Valve Lift w/1.7 Rockers:.775'' Intake / .748'' Exhaust
Valve Setting:.026'' Intake / .028'' Exhaust
Lobe Separation Angle:112°

Specifications:

Exhaust Valve Lift (in.)
0.748
Intake Valve Lift (in.)
0.775
Int. Duration @ .050 in. (Deg)
284
Exh. Duration @ .050 in. (Deg)
292
Int. Duration Advertised (Deg)
324
Exh. Duration Advertised (Deg)
332
RPM Range
5200-7500
Engine Make/Size
Chevy Big Block (396-454)
Lifter Type
Mechanical Roller
Usage
Strip
Lobe Separation (Deg)
112
Advertised Duration
324 int./332 exh.
Advertised Exhaust Duration
332
Advertised Intake Duration
324
Basic Operating RPM Range
5,200-7,500
Cam Style
Mechanical roller tappet
Camshaft Gear Attachment
3-bolt
Computer-Controlled Compatible
No
Duration at 050 inch Lift
284 int./292 exh.
Exhaust Duration at 050 inch Lift
292
Exhaust Valve Lash (in.)
0.028
Exhaust Valve Lift with Factory Rocker Arm Ratio (
0.748
Grind Number
324AR-12
Intake Duration at 050 inch Lift
284
Intake Valve Lash (in.)
0.026
Intake Valve Lift with Factory Rocker Arm Ratio (i
0.775
Quantity
Sold individually
Valve Lift with Factory Rocker Arm Ratio
0.775 int./0.748 exh.
Valve Springs Required
Yes
Manufacturer's Part Number:
11-721-9

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.

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