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Crane Cams 114681

Crane Cams Mechanical Flat Tappet Camshaft Lift: .518" /.536" Advertised Duration: 280°/288° RPM Range: 3200-7000

271-114681

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$136.78
Crane Cams Mechanical Flat Tappet Camshaft Lift: .518" /.536" Advertised Duration: 280°/288° RPM Range: 3200-7000 $136.78
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Mechanical Flat Tappet Camshaft
Lift: .518''/.536''
Advertised Duration: 280°/288°
RPM Range: 3200-7000

Crane Cams 114681 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.

ROUGH IDLE, MODERATE PERFORMANCE USAGE, GOOD MID-RANGE HP, 3600-4000 CRUISE RPM, 10.5 TO 12.0 COMPRESSION RATIO ADVISED.

Grind Number: F-280-2 (replaces CC-280A)
Operating Range:3200-7000 RPM
Duration Advertised:280° Intake / 288° Exhaust
Duration @ .050'' Lift:244° Intake / 252° Exhaust
Valve Lift w/1.5 Rockers:.518'' Intake / .536'' Exhaust
Lobe Separation Angle:112°
Max Lift Angle:107° ATDC Intake / 117° BTDC Exhaust
Open/Close @.050'' Cam Lift:Intake - 14° BTDC (opens) / 50° ABDC (closes)
Exhaust - 62° BBDC (opens) / 10° ATDC (closes)

Specifications:

Manufacturer's Part Number:
BBLV-114681
Shipping Weight:
8.53
Package Height:
22.25
Package Depth:
3
Package Width:
3

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.

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