Gm 847 cam - LS1TECH - Camaro and Firebird Forum Discussion

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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Gm 847 cam

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Old 03-11-2018, 08:11 PM
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I have been looking around and canít find any for sale new. Have they been discontinued? If any knows where I can get one or has one for sale please let me know. Thank you
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Old 03-12-2018, 12:22 AM
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Have you checked to see if they're still listed in the GMPP catalog?

If they're not listed, then the likelihood of finding one is remote.

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Old 03-12-2018, 05:35 AM
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They still sell what looks like a gen1 version of the GM847 under part number 19244485
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Old 03-12-2018, 11:55 PM
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So what is the difference between the regular sbc cam and a lt1? Is it just the length of the pin?
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Old 03-13-2018, 03:11 AM
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Originally Posted by cam2z View Post
So what is the difference between the regular sbc cam and a lt1? Is it just the length of the pin?


The opti spark shaft slides in the front of the cam also.
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Old 03-13-2018, 11:11 AM
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Originally Posted by cam2z View Post
So what is the difference between the regular sbc cam and a lt1? Is it just the length of the pin?
You will have to get one that is for a roller engine (roller lifters). The cam snout is machined with a step for a cam plate to keep it from walking. If you have a vented opti then you will have to get the center hole in the cam snout drilled out to accept the opti.
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