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LS4 rebuilt to LS6?

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Old 05-04-2010, 07:13 PM
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Old 05-04-2010, 07:50 PM
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dudes just being a smart ***.
Old 05-04-2010, 08:25 PM
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C'mon guys, we know anything is possible with our vehicles! Hell, we seen a RWD W Body monte doing doughnuts on 22's lets just stop the arguing and drink some beer while watching Manswers,..............
Old 05-04-2010, 08:28 PM
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We already have the proper crankshaft, so we would need to have our blocks resleeved and bored .120" in order to have a 5.7L or a 3.9" bore.
Or we could just use our crank and front accessory drive setup, mounts, and all other LS4 related equipment (sensors and b.s) with this adapter plate mounted to a ls1, ls6, ls2 block.

This is the motor plate that gets the LS1, LS6, L33, LM7, LQ4, LQ9, or any other GEN 3 and GEN 4 engine mated to the best automatic transmission today. The 4T65eHD from the Grand Prix, and other nice GM cars. There are bolts provided in 2 special holes, and one crankshaft to torque converter bushing not pictured at this time.
Back to Top
--------------------------------------------------------------------------------
NEW GM Ls6 short block: 2200.00
http://cgi.ebay.com/ebaymotors/GM-CH...Q5fAccessories

Using all of the LS6 parts on a 5.3 should put us at about 375 Crankshaft hp. pistons, cam, valve train, intake, tb, maf, and DT headers. Resleeving costs about 2500

Last edited by DavidGXP; 05-04-2010 at 08:57 PM.
Old 05-04-2010, 10:07 PM
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and we have a winner
Old 05-05-2010, 01:27 AM
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Originally Posted by DavidGXP
We already have the proper crankshaft, so we would need to have our blocks resleeved and bored .120" in order to have a 5.7L or a 3.9" bore.
Or we could just use our crank and front accessory drive setup, mounts, and all other LS4 related equipment (sensors and b.s) with this adapter plate mounted to a ls1, ls6, ls2 block.

This is the motor plate that gets the LS1, LS6, L33, LM7, LQ4, LQ9, or any other GEN 3 and GEN 4 engine mated to the best automatic transmission today. The 4T65eHD from the Grand Prix, and other nice GM cars. There are bolts provided in 2 special holes, and one crankshaft to torque converter bushing not pictured at this time.
Back to Top
--------------------------------------------------------------------------------
NEW GM Ls6 short block: 2200.00
http://cgi.ebay.com/ebaymotors/GM-CH...Q5fAccessories

Using all of the LS6 parts on a 5.3 should put us at about 375 Crankshaft hp. pistons, cam, valve train, intake, tb, maf, and DT headers. Resleeving costs about 2500
And that's why Loyde stamps all of his parts. The least you could have done is quote anything you steal from his (or anyone else's) site.

Btw, he is the only person who makes those adapter plates. He also has one for the LS4 to 6T75.
Old 05-05-2010, 06:29 AM
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Originally Posted by GXP25
And that's why Loyde stamps all of his parts. The least you could have done is quote anything you steal from his (or anyone else's) site.

Btw, he is the only person who makes those adapter plates. He also has one for the LS4 to 6T75.
Well, not the only one. Archie has adapters to mate LSx and SBC engines to the FWD bolt pattern. Pricy though.

Old 05-05-2010, 10:40 AM
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hahaha i am just joking, but i may be doing a bore and forged internals
Old 05-05-2010, 12:36 PM
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what i want to know is why gm shortened the crank instead of finding the space elsewhere i mean 3mm on one side 13 on the other thats like 5/8 of an inch

that engine swap might not be too expensive you can reuse our heads coils exhaust manis (or headers) really all you need is a shortblock and be ready to use an ls4 crank

Last edited by Pauls325; 05-05-2010 at 12:54 PM.
Old 05-05-2010, 12:58 PM
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why does GM do anything, think about how easy it would have been to fit an LS2 or LS6 intake from the factory. I'm sure warranty claims had something to do with that though.
Old 05-05-2010, 01:00 PM
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If it will fit between the fenders. Might need to get custom length half shafts or something.
Old 05-05-2010, 03:41 PM
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I think the reasoning behind shortening the crank wasn't so much so the engine would fit better, but the accessory drive would fit better.

As it is now that crank bolt is darn near impossible to take out.

Remember the green/blue/black 98-03 body style Grand Prix that someone swapped an LS1 into....might want to look there for pictures...I think that person bought the prototype LS4 engine and used it for that car.

Last edited by Bryan921SS; 05-05-2010 at 04:03 PM.
Old 05-05-2010, 06:02 PM
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The plate would push the motor forward, so clearence might become an issue.
Old 05-05-2010, 08:45 PM
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Originally Posted by TiredGXP
Well, not the only one. Archie has adapters to mate LSx and SBC engines to the FWD bolt pattern. Pricy though.

AFAIK, ArchieV8's are for the F40 (6 speed manual).
Old 05-06-2010, 11:32 PM
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wow.. i was just about to ask that?lol if it was possible to just swap out the LS6 block with LS4 accesories..
Old 05-07-2010, 05:48 PM
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I am looking into stroking the engine out. I was going to bore but you need to take the sleeves out, bore it, than re sleeve it and its not at all worth the money it would cost. Prolly would cost more to do that than just buy a turbo kit.
The stroking is hard to do because of the shortened crank. I am thinking of machining an ls1 crank down. Than using forged rods and pistons.
Old 05-07-2010, 09:45 PM
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Originally Posted by blakss
wow.. i was just about to ask that?lol if it was possible to just swap out the LS6 block with LS4 accesories..
I would think you could? Get the crank machined, and drill and tap the block for the fwd trans. The only thing I would worry about is hitting a water jacket. But hell I don’t know for sure never done it.



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