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Post Info TOPIC: GM Roller Camshaft Specs LT1 - LT4 and ZZ


$y$Op

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GM Roller Camshaft Specs LT1 - LT4 and ZZ


Part NumberTypeDUR @ .050"LiftC/RLSAUsage
14093643Hyd. Roller202/206 .403"/.415" 8.5:1 115'87 350 Corvette and IROC Camaro
10134334Hyd. Roller235/235 .480"/.480" 9.0:1 114350 ZZZ through ZZ2 crate motors
10185071Hyd. Roller208/221 .474"/.510" 9.8:1 112350/345 ZZ3 & ZZ4 crate motor
10224241Hyd. Roller- - --'92 to'94 Gen. 11 LT1 350
10243779Hyd. Roller- - --'94 to '96 Gen. II L99 265 V-8
12370845Hyd. Roller214/224 .488"/.509"-112Off-road use, lobe for mech. fuel pump
12370846Hyd. Roller222/230 .509"/.528"-112Off-road use, lobe for mech. fuel pump
12370847Hyd. Roller232/242 .539"/.558"-112Off-road use, lobe for mech. fuel pump
125517051Hyd. Roller201/208 .447"/.459"10.4:1112'95 to '96 Gen. 11 LT1 350, w/center dowel pin
12551142Hyd. Roller203/210 .476"/.480"10.8:1115.5'96 350 LT4 w/1.6:1 roller rockers
24502586Hyd. Roller218/228 .525"/.525"10.8:1-'96 LT4 H.O.T crate motor cam, use
- --- -- w/1.6:1 roller rockers.
N/A Hyd. Roller202/210 .472"/.478"10.0:1 11'97 Gen. III LS1 Corvette 350, uses 1.7


-- Edited by Administrator at 03:20, 2008-04-27

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$y$Op

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Date:
Late and early LT1 Roller Camshafts


There seems to be an issue that we have not touched base on with regards to our photo CD regarding late and early camshafts. We have updated this information on our CD and members can view it on our private web server.

For the general public there are two things to remember about early and late model camshafts.

(1) Early camshafts have a short pin that locates the camshaft sproket
(2) Late camshafts have a long pin that locates not only the camshaft, but also drives the distributor. Also there is a much larger bore in the center of a late model camshaft compared to that of an early model. The distributor has a shaft that also slides into the center of the cam to center it. While it was a good idea and gives the distributor more stability compated to the earlier design, the early model cams will not fit the late model distributors, and camshafts being used out of a late model must have their pins trimmed in order to work in the early models.

I have attached a photo so you can see what I am talking about. Also see our photo CD for full details.

-- Edited by Administrator at 14:00, 2008-03-30

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Anonymous

Date:
RE: GM Roller Camshaft Specs LT1 - LT4 and ZZ


What are the specs for the Comp Cams 306?

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$y$Op

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Posts: 309
Date:

I started a new thread for the COMP CAMS. This thread is for the GM Performance camshafts.

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