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Old

Dec 4, 2019 | 05:10 PM

#1

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ly6 pistons

what is the compression height of a stock ly6 piston and how far in the hole does it sit thanks

Old

Dec 4, 2019 | 05:19 PM

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i picked up a 2008 ly6 havent pulled it apart yet
. wanted to upgrade the pistons and rods to forged units. thought i would order pistons and rods before i did as long as cylinders look good
n

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Dec 4, 2019 | 07:30 PM

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Most all LS engines pistons are either flush or slightly (.001-.004) ABOVE the deck.

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Dec 4, 2019 | 07:54 PM

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thanks

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Dec 4, 2019 | 08:08 PM

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1.340” is common compression height for LS engines with factory stroke and 6.098 rod. The confusion comes from truck blocks having a 9.23 deck height and car (aluminum) blocks having a 9.24 deck height. I bought a set of Mahle pistons with a 1.340 comp height for an LY6 and they worked great. Link below...

https://www.summitracing.com/parts/m...make/chevrolet

Old

Dec 4, 2019 | 08:10 PM

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thanks Che70velle that what i was looking for

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Dec 5, 2019 | 04:39 AM

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Are those pistons 2618 or the other 4xxx forging?

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Old

Dec 5, 2019 | 04:58 AM

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Factory ly6 pistons are flat tops but dished to lower CR.

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Old

Dec 5, 2019 | 07:38 AM

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Jimbo if you were asking me about the pistons that are in the engine i haven't taken the heads off yet

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Dec 5, 2019 | 11:18 AM

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No, I meant the ones from Summit supplied ones?

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Dec 5, 2019 | 05:21 PM

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Quote:

Originally Posted by Jimbo1367

Are those pistons 2618 or the other 4xxx forging?

2618 or 4032...but I don’t remember which. I want to say 4032...

Old

Dec 23, 2019 | 05:49 PM

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Quote:

Originally Posted by Che70velle

2618 or 4032...but I don’t remember which. I want to say 4032...

that’s was what I was wondering. Thanks

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