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are LS1 and LS6 pistons different?

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Old 04-25-2008, 06:41 PM
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Default are LS1 and LS6 pistons different?

A friends 01 WS6 had a pistong that melted part of the ringland. So I got a LS1 piston from someone for free but noticed they have a couple things that look a little different. I know they are the same bore but is there a weight difference or any reason why I shouldn't run the LS1 piston with the others being LS6?

Jason
Old 04-26-2008, 09:31 AM
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Or more the point any difference in pistons between 2000 and 2001 LS1's? Not sure if the block in mine is a LS6 or not but IIRC it would've been LS1 internals anyways. The spare piston we picked up is from a 00 LS1 Camaro SS.
Old 04-26-2008, 12:11 PM
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no one? I looked at the FAQ and there was no mention of a change in pistons between 98 and 02. but was there?!
Old 04-26-2008, 01:56 PM
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They are a different mixture of alloys. Both are hypereutectic, and both made by Mahle. the LS6 is a little lighter, and a little stronger than the LS1. I would try to keep sets together to avoid any balancing issues.

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Old 04-26-2008, 03:31 PM
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It's not an LS6 engine though but may be an LS6 block (Forgot to check the number on the block). They're both LS1 internals but the 00 SS piston looks like it has some differences from my 01 LS1 piston.

Main question is if the 00 LS1 pistons changed at all in 01.
Old 04-26-2008, 05:08 PM
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There is a bulge on the skirt of the 2000 piston and the 2001 piston has a groove in the middle of the material that is between the top 2 rings...
Attached Thumbnails are LS1 and LS6 pistons different?-p1.jpg   are LS1 and LS6 pistons different?-p2.jpg   are LS1 and LS6 pistons different?-p3.jpg  
Old 04-26-2008, 05:26 PM
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it almost looks like it might be an LS6 piston!? here's a picture I found of a 2001 LS6 piston. If you look at the skirts and sides, the 01 looks more like the LS6 here than the 2000 LS1.

Old 04-27-2008, 09:24 AM
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Nice chevelle BTW. I had a 71SS with the same color scheme.
Old 04-27-2008, 11:03 AM
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What confuses me more is that the dealer lists the same part number from 98-01 for the LS1's.



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