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CHEVY
SMALL-BLOCK V8
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CAMSHAFTS
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SMALL-BLOCK
V8 CAMSHAFTS QUICK REFERENCE CHART
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Number Part |
Description |
Duration atLash Point (degrees) |
Duration at .050" Tappet Lift (degrees) |
Maximum
Lift with
1.5:1
Rocker
Ratio |
Valve Lash |
Lobe Centerlines (degrees) |
Notes |
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12523897 |
Hydraulic flat tappet |
I: 2 94
E : 2 9 4 |
I: 2 02
E : 2 0 6 |
I:. 403"
E:.415" |
Zero/Zero |
1 1 5 |
83-86 305ci Z-28 and L-69 Camaro. |
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3863151 |
Hydraulic flat tappet |
I: 3 20
E : 3 2 0 |
I: 2 21
E : 2 2 1 |
I:. 447"
E:.447" |
Zero/Zero |
1 1 4 |
65-67 Corvette and Chevy II L-79 cam. Excellent power and torque. ID# 3863152.
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3896962 |
Hydraulic flat tappet |
I: 3 12
E : 3 1 2 |
I: 2 22
E : 2 2 2 |
I:. 450"
E:.460" |
Zero/Zero |
1 1 4 |
69-81 L-46 and L-82 Corvette cam. Moderate torque, excellent power. ID# 3896964.
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24502476 |
Hydraulic flat tappet |
I: 3 20
E : 3 2 4 |
I: 2 12
E : 2 2 2 |
I: 435"
E : 460" |
Zero/Zero |
112.5 |
350-300 HP Special performance engine 12355345. |
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3972178 |
Mechanical flat tappet |
I: 3 00
E : 3 1 2 |
I: 2 42
E : 2 5 4 |
I:. 435"
E:.455" |
I: 024"
E : 030" |
1 1 6 |
70-71 Corvette and Camaro LT-1 cam. Good all around street mechanical cam. ID#
3972182. |
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3965754 |
Mechanical flat tappet |
I: 3 18
E : 3 2 7 |
I: 2 62
E : 2 7 3 |
I:. 488"
E:.509" |
I:.024"
E : 026" |
1 1 2 |
Second design racing cam; good short track and road racing cam for 350ci and
larger V8. Use with spring P/N 330585.ID#3965751. |
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14093643 |
Hydraulic roller tappet |
I: 2 94
E : 2 9 4 |
I:202
E : 2 0 6 |
I:. 403"
E:.415" |
Zero/Zero |
1 1 5 |
87 350ci Corvette and IROC-Z Camaro. |
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14097395 |
Hydraulic roller design |
I: 2 88
E : 3 0 8 |
I: 1 96
E : 2 0 6 |
I: 4 31
E : 4 5 1 |
Zero/Zero |
1 0 9 |
383 Truck with 1.5 rockers |
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10134334 |
Hydraulic roller tappet |
I: 3 36
E : 3 3 6 |
I: 2 35 E : 2 3 5 |
I:. 480"
E:.480" |
Zero/Zero |
1 1 4 |
5.7-liter H.O. engine asm. cam. Use with spring P/N 10134358. For ZZZ through
ZZ2 engines. |
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10185071 |
Hydraulic roller tappet |
I: 2 75
E : 2 8 0 |
I: 2 08
E : 2 2 1 |
I: 474"
E : 510" |
Zero/Zero |
1 1 2 |
5.7L HO 350 ZZ3 engine Use with spring P/N 10134358. |
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12551705 |
Hydraulic roller tappet |
N/A |
I: 2 01
E : 2 0 8 |
I:. 447"
E:.459" |
Zero/Zero |
N/A |
1995-97 LT1 Corvette-Camaro. |
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12551142 |
Hydraulic Roller LT4 Production Cam |
N/A |
I: 2 03
E: 210 |
"1.6 Rocker"
I: 4 76
E: 480 |
Zero/Zero |
1 1 5 |
Production LT4 Cam 1996. |
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24502586 1.5 Rocker |
Hydraulic Roller (LT4 Hot Cam) |
I: 2 79
E : 2 8 7 |
I: 2 18
E : 2 2 8 |
"1.5 Rocker"
I: 4 92
E : 4 9 2 |
Zero/Zero |
1 1 2 |
Service only. For all V8 engines with roller camshafts. See Note #1. |
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24502586 1.6 Rocker |
Hydraulic Roller (LT4 Hot Cam) |
I: 2 79
E : 2 8 7 |
I: 2 18
E : 2 2 8 |
"1.6 Rocker"
I: 5 25
E : 5 2 5 |
Zero/Zero |
1 1 2 |
Service only. For all V8 engines with roller camshafts. See Note #1. |
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12480002 |
Hydraulic Roller (LT4 Hot Cam Kit) |
I: 2 79
E : 2 8 7 |
I: 2 18
E : 2 28 |
"1.6 Rocker"
I: 5 25
E : 5 25 |
Zero/Zero |
1 1 2 |
Same as P/N 24502586 except it includes alum. rockers, valve springs and retainers.
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12370845 |
Hydraulic roller design |
N/A |
I: 2 14
E : 2 2 4 |
I: 488"
E : 509" |
Zero/Zero |
1 1 2 |
Contains eccentric for mechanical fuel pump. Off-road use only. |
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12370846 |
Hydraulic roller design |
N/A |
I: 2 22
E : 2 3 0 |
I: 509"
E : 528" |
Zero/Zero |
1 1 2 |
Contains eccentric for mechanical fuel pump. Off-road use only. |
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12370847 |
Hydraulic roller design |
N/A |
I: 2 34
E : 2 4 2 |
I: 539"
E : 558" |
Zero/Zero |
1 1 2 |
Contains eccentric for mechanical fuel pump. Off-road use only. |
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Note
1: The LT4 camshaft P/N 24502586 was designed to be used in a number
of different engines. Therefore, the following change may need
to be made to allow for correct assembly of the engine: For LT1
and L98 engines 1995 and before, the dowel pin in the end of the
camshaft
must be pushed in so extension from end of cam is .30 +/–.01"
, the same as the production part. For 1996 LT1 and LT4 engines,
the dowel
pin is in the correct position, extending .620" from end of
camshaft. This camshaft has a fuel pump lobe.
Note 2: Distributor P/N 1104067 or melonized distributor gear P/N
10456413 must be used on all crate engines with steel camshafts.
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