0
Shop By Vehicle
Top Categories
All Categories

Top Categories

All Categories


Hi, ! (Not you?)
My Account
Track Order
Help
Contact Us
COMP Cams 11-740-9

COMP Cams Drag Race Mechanical Roller Camshaft Lift .748"/.748" Duration 321/336 RPM Range 5000-7500

249-11-740-9

Free Shipping Estimated to ship directly from the manufacturer on 10/29/18

$324.99
COMP Cams Drag Race Mechanical Roller Camshaft Lift .748"/.748" Duration 321/336 RPM Range 5000-7500 $324.99
QTY
Drag Race Mechanical Roller Camshaft
Lift .748"/.748"
Duration 321/336
RPM Range 5000-7500

COMP Cams 11-740-9 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 Comp, 5000 stall converter, 500+ ci

Operating Range:5000-7500 RPM
Duration Advertised:321° Intake / 336° Exhaust
Duration @ .050'' Lift:286° Intake / 298° Exhaust
Valve Lift w/1.7 Rockers:.748'' Intake / .748'' Exhaust
Valve Setting:.028'' Intake / .030'' Exhaust
Lobe Separation Angle:112°

Specifications:

Exhaust Valve Lift (in.)
0.748
Intake Valve Lift (in.)
0.748
Int. Duration @ .050 in. (Deg)
286
Exh. Duration @ .050 in. (Deg)
298
Int. Duration Advertised (Deg)
321-4
Exh. Duration Advertised (Deg)
336-5
RPM Range
5000-7500
Engine Make/Size
Chevy Big Block (396-454)
Lifter Type
Mechanical Roller
Usage
Strip
Lobe Separation (Deg)
112
Advertised Duration
321 int./336 exh.
Advertised Exhaust Duration
336
Advertised Intake Duration
321
Basic Operating RPM Range
5,000-7,500
Cam Style
Mechanical roller tappet
Computer-Controlled Compatible
No
Duration at 050 inch Lift
286 int./298 exh.
Exhaust Duration at 050 inch Lift
298
Exhaust Valve Lash (in.)
0.03
Exhaust Valve Lift with Factory Rocker Arm Ratio (
0.748
Grind Number
CB 321JR-12
Intake Duration at 050 inch Lift
286
Intake Valve Lash (in.)
0.028
Intake Valve Lift with Factory Rocker Arm Ratio (i
0.748
Quantity
Sold individually
Valve Lift with Factory Rocker Arm Ratio
0.748 int./0.748 exh.
Valve Springs Required
Yes
Manufacturer's Part Number:
11-740-9

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.

  • Items You Need

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

    Tools:

    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.