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COMP Cams 11-604-5

Comp Cams Magnum Mechanical Flat Tappet Camshafts

COMP Cams 11-604-5


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COMP Cams 11-604-5 Comp Cams Magnum Mechanical Flat Tappet Camshafts $192.99
Magnum Marine 294B Mechanical Flat Tappet Camshaft
Lift: .580''/.605''
Duration: 294°/304°
Lobe Separation Angle: 108°
RPM Range: 3500-6500

COMP Cams 11-604-5 Details

Chevy 396-454ci Big Block 1965-96

  • Marine

    *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.

    Use in 396-427 c.i., heavy car, 3500+ stall & 10.5:1 compression. Marine - Excellent for jet boat A or B impeller. 427-454ci 10:1 compression.

    Operating Range:3500-6500 RPM
    Duration Advertised:294° Intake / 304° Exhaust
    Duration @ .050'' Lift:256° Intake / 266° Exhaust
    Valve Lift w/1.7 Rockers:.580'' Intake / .605'' Exhaust
    Valve Setting:.028'' Intake / .030'' Exhaust
    Lobe Separation Angle:108°

  • Specifications:

    Intake Valve Lift (in.)
    Exhaust Valve Lift (in.)
    Int. Duration @ .050 in. (Deg)
    Exh. Duration @ .050 in. (Deg)
    Int. Duration Advertised (Deg)
    Exh. Duration Advertised (Deg)
    RPM Range
    Engine Make/Size
    Chevy Big Block (396-454)
    Lifter Type
    Mechanical Flat Tappet
    Advertised Duration
    294 int./304 exh.
    Advertised Exhaust Duration
    Advertised Intake Duration
    Basic Operating RPM Range
    Cam Style
    Mechanical flat tappet
    Computer-Controlled Compatible
    Duration at 050 inch Lift
    256 int./266 exh.
    Exhaust Duration at 050 inch Lift
    Exhaust Valve Lash (in.)
    Exhaust Valve Lift with Factory Rocker Arm Ratio (
    Grind Number
    CB 294B-8
    Intake Duration at 050 inch Lift
    Intake Valve Lash (in.)
    Intake Valve Lift with Factory Rocker Arm Ratio (i
    Sold individually
    Valve Lift with Factory Rocker Arm Ratio
    0.580 int./0.605 exh.
    Valve Springs Required
    Lobe Separation (Deg)
    Manufacturer's Part Number:

    Magnum camshafts are very aggressive and specifically designed for the street enthusiast looking for more power with that Pro Street sound. Intended for performance oriented vehicles that will see little street use. The idle characteristics of your engine will change due to the increased duration and overlap of the Magnum Cam Series. You will notice a racey idle with the 282-grind while the 294 and 306-grinds will produce a rough or ''rumbly'' idle. Stock components are generally incompatible. Changes are needed in rear end gear ratios, headers and the torque converter. Comp Cams Magnum Cams will affect your power accessories to a certain extent. The 280 and 292-grinds are the biggest cams that should be used with power assisted brakes, air conditioning, etc. You should remember that the bigger the engine is, the less the cam will affect the vacuum which affects your power accessories. The smaller your engine is, the more the Magnum Camshaft will affect your power accessories. Most late model vehicles have a vacuum canister. If your vehicle does not have a vacuum canister, it may be necessary to add one.

  • Great high RPM power
  • Easy on valve train parts
  • Can be used with mild ratio rocker arms and traditional performance valve springs
  • Best with aftermarket converter and 9.5:1+ compression

    270S Series
    The 270S Solid Magnum Cam is the perfect cam for small to medium cubic inch engines. The 270S delivers good low speed torque with a moderate noticeable idle. This cam is an excellent alternative to the 268H.

    282S Series
    The 282S Solid Magnum Cam is great for street machines because it can be driven daily and raced on weekends. This cam features a broad power curve and torque range with a mild rough idle.

    294S Series
    The 294S Solid Magnum Cam is a maximum performance cam. This cam should be used in high compression 4-speed cars. The 294S makes great top-end power and works well with ported heads.

    306S Series
    The 306S Solid Magnum Cam is an excellent grind for large cubic inch Pro-Street type engines. This cam has tremendous high RPM power and needs to be used with headers, intake and higher compression. This cam does not have the advance made into it and will need to be degreed in.

    Camshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft, Lifters, Assembly Lube, Decals, and Instructions.

    Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Retainers, Locks, Assembly Lube, Decals, and Instructions.

    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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