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COMP Cams CL12-212-2 - Comp Cams 'Magnum' Hydraulic Flat Tappet Camshafts

COMP Cams CL12-212-2 - Comp Cams 'Magnum' Hydraulic Flat Tappet Camshafts

COMP Cams#249-CL12-212-2

Magnum 280H Hydraulic Flat Tappet Camshaft & Lifter Kit
Lift: .480''
Duration: 280°
RPM Range: 2000-6000
  • Fits Applications:
  • 1977-1980
    BUICK
    1955-1986
    CHEVROLET
    1967-1986
    GMC
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COMP Cams CL12-212-2 - Comp Cams 'Magnum' Hydraulic Flat Tappet Camshafts 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.

Great for street machines. Needs stall, headers & gears. Rough idle.

Operating Range:2000-6000 RPM
Duration Advertised:280° Intake / 280° Exhaust
Duration @ .050'' Lift:230° Intake / 230° Exhaust
Valve Lift w/1.5 Rockers:.480'' Intake / .480'' Exhaust
Lobe Separation Angle:110°

COMP Cams CL12-212-2 - Comp Cams 'Magnum' Hydraulic Flat Tappet Camshafts

Comp Cams 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 280-grind while the 292 and 305-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. 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.

268H Series
Good street performance with stock converter, choppy idle.

270H Series
Great for high performance driving in street machines. The 270H has a rough idle in small blocks and a noticeable idle in big blocks. This is the largest cam that can be used with a stock torque converter. The 270H should not affect power accessories, but should be used with headers and 4bbl carburetor.

280H Series
Best for serious street machines. This cam has a definite rough idle and will sometimes affect power accessories. It can be driven extensively on the street or raced on the weekends. The 280H needs an aftermarket converter, intake manifold and headers.

286H Series
Designed to fill in the gap between teh 280H and 292H. For serious street machines and bracket racers. With a rough idle and lower vacuum signal, this is not an average street cam. At least a 2500-RPM converter must be used, but a 3000 is recommended.

292H Series
This cam is for the serious street/strip type car. An aftermarket torque converter should be used as well as headers, intake and increased compression. The 292H has a radical, rough idle.

305H Series
The 305H should really be considered for Pro-Street type cars where actual streetability is not a major concern. The design of this cam also makes it ideal for all bracket racing engines. Major engine modifications are needed as well as transmission and driveline improvements. The 305H works best in large cubic inch engines and has a radical idle. This is the only hydraulic cam in the series that does not have an 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.

COMP Cams 249-CL12-212-2

Exhaust Valve Lift (in.)
0.48
Intake Valve Lift (in.)
0.480
Exh. Duration @ .050 in. (Deg)
230
Int. Duration @ .050 in. (Deg)
230
Exh. Duration Advertised (Deg)
280
Int. Duration Advertised (Deg)
280
Engine Make/Size
Chevy Small Block (262-400)
Lifter Type
Hydraulic Flat Tappet
Usage
Street/Performance
RPM Range
2000-9000
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