INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

Crank Interchangeability???

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Old 12-29-2012, 03:18 PM
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Default Crank Interchangeability???

I'm redoing the bottom end in an '05 LS2 and it has the rare/hard-to-find 24x crank.

My question is, are there any non-LS2 cranks that would work without having them balanced?

In thoery, an LQ9 crank would work, and possibly an LQ4 crank. What do you guys think?
Old 12-29-2012, 03:20 PM
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Here's what the current crank looks like. Is this even repairable?

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Old 12-29-2012, 05:35 PM
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All the crank are the same. I have a ls2 crank in my lq9 not problems here
Old 12-29-2012, 06:20 PM
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x2 on using a lq4/lq9 crank. There the same.
Old 12-29-2012, 06:24 PM
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Actually, i think ls1, ls2, 4.8, 5.3, and 6.0 are all the same. Same stroke i believe, just different bores.
Old 12-29-2012, 06:25 PM
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EXCEPT for a early 6.0 crank
They can only be used with a 80e trans
Old 12-29-2012, 07:43 PM
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I thought the 4.8 & 5.3 shared the same bore size/block but the 4.8 crank has a shorter throw.

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Old 12-29-2012, 07:48 PM
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Originally Posted by 2doorfury
Actually, i think ls1, ls2, 4.8, 5.3, and 6.0 are all the same. Same stroke i believe, just different bores.
4.8 is short stroke. LS1 and LS2 cranks have the mains gun-drilled.

LQ9's have the same piston and rod assembly as LS2's, correct?

LQ4's have the weaker rods, dished pistons, and pressed pins, right?
Old 12-29-2012, 08:25 PM
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Its all in the bore, rods and pistons. Other theb that the cranks have the same stroke. Buuut, you are correct about the ls1/ls2 cranks being drilled.
Old 12-29-2012, 08:27 PM
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I think lq4 and lq9 rods are the same. I believe under 06 were the good ones. I believe they were forged. Lq4's have dished pistons and pressed pins. Lq9's have the flat top pistons and i believe pressed pins also.


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