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Crane Cams Mechanical Flat Tappet Camshaft Lift: .554"/.572" Advertised Duration: 296°/304° RPM Range: 4400-7600

Crane Cams 111431

271-111431

Crane Cams Mechanical Flat Tappet Camshaft Lift: .554"/.572" Advertised Duration: 296°/304° RPM Range: 4400-7600 $136.78
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Need it Sooner? This similar item ships today!
COMP Cams Drag Race Mechanical Flat Tappet Camshaft Small Block Chevy 262-400ci 1955-98 Lift: .570"/.590"
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Mechanical Flat Tappet Camshaft
Lift: .554"/.572"
Advertised Duration: 296°/304°
RPM Range: 4400-7600

Crane Cams 111431 Details

1957-87 Small Block Chevy 262-400

*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: Beginning in 1987, most of the V-6 and V-8 engines were equipped with hydraulic roller camshafts. There are differences in the block to accommodate a cam retention thrust plate and the anti-rotation mechanism for the lifters. These blocks are identifiable by bolt holes for a cam retention plate under the upper timing sprocket, as well as bosses and tapped holes in the lifter valley for lifter retention hardware. The camshafts on these engines have a step nose and smaller bolt circle on the front of the cam. An earlier model camshaft may be used in these blocks by using the appropriate timing chain set and adding a thrust button when using a roller cam.
1988-99 Chevrolet 305 and 350 V-8 engines (and some 1987 350 V-8 engines) use a different configuration camshaft core than the 1955-87 engines and cannot be interchanged.

***Note: Self-aligning rocker arms cannot be used with mechanical lifter camshafts.

PERFORMANCE USAGE, GOOD MID AND UPPER RPM HP, BRACKET RACING; PRO, SUPER PRO, HOT ROD, SUPER ET, ETC., AUTO TRANS W/RACE CONVERTER, 11.5 MINIMUM COMPRESSION RATIO ADVISED.

Grind Number: F-260/3694-2S-6
Operating Range:4400-7600 RPM
Duration Advertised:296° Intake / 304° Exhaust
Duration @ .050'' Lift:260° Intake / 268° Exhaust
Valve Lift w/1.5 Rockers:.554'' Intake / .572'' Exhaust
Lobe Separation Angle:106°
Max Lift Angle:104° ATDC Intake / 108° BTDC Exhaust
Open/Close @.050'' Cam Lift:Intake - 26° BTDC (opens) / 54° ABDC (closes)
Exhaust - 62° BBDC (opens) / 26° ATDC (closes)

Specifications:

Manufacturer's Part Number:
111431

The most popular OEM camshaft type through the late '80s, hydraulic lifter profiles can provide a power curve that tops out just over 7000 RPM (when used in conjunction with high performance hydraulic lifters) while offering ease of maintenance. Choices range from grinds developed to improve bottom-end torque for towing to aggressive profiles with rough idle characteristics that many enthusiasts prefer.

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