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LS7 Crank into a LS1/6 block

This is a discussion on LS7 Crank into a LS1/6 block within the Internal Engine forums, part of the LSx Technical Help Section category; Did a search on this but found no info. Was wondering if the LS7 crank will fit a LS1/6 block. ...

  1. #1
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    LS7 Crank into a LS1/6 block

    Did a search on this but found no info. Was wondering if the LS7 crank will fit a LS1/6 block. The main specs are the same according to the GMPP catalog. Coming from the Mustang world I'm a little spoiled by the cost and strength of the Cobra crank, hoping to luck out with the GM stuff too. I'm looking for a forged crank to build a 383.

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    Just use an Eagle or the new Compstar crank. The ls7 crank has a longer snout (dry sump oil system I guess), and it has a 58x reluctor, which would require you to use a newer pcm.

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    I've done machining before and personally don't like Eagle anything. I will look into the Compstar, which I believe is Callies? The price of the LS7 crank is what got my attention. May call Doc Meyer and see what he says.

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    If you are starting bare bones IE: no pcm or anything, then all you would have to do is machine the snout on the crank and buy a pcm that is setup for a 58x reluctor. You may be money ahead that way. I honestly couldn't tell you the price differnece. FWIW I went with a callies Dragoonslayer crank in my build.

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    I thought maybe GM sold the 24X 12559353 wheel in the GMPP catalog to replace the 58X. How much longer is the snout do you know? The crank is less than $750 most of the places I have contacted.
    Last edited by Thomas Doll; 01-12-2007 at 12:07 PM. Reason: none

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    I really don't know how much longer the snout is, but it is long enough to have to machine it. You can have the reluctors changed out. check Speedinc.com for a price on the compstar crank. I think it is like $805.

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    Also, you may have to add a lot of tungstan to the ls7 crank? The Compstar sounds good and callies may rough balance it for you. $800 sounds like a really good price to me.

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    Also the ls7 crank is very heavy.

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