will 6l pistons fit in a 5.3l block?

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06-01-2005, 03:15 PM

T23LS1

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will 6l pistons fit in a 5.3l block?

As the question says- I have a set of 6.0 pistons laying around and would like the added size/ compression the pstons would add. Looking for a cheap way to get some power from my 5.3.
If this is a bad idea let me know..

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06-01-2005, 04:53 PM

Reckless

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6.0L pistons are for a 4-inch bore. To get a 5.3L block to a 4-inch bore would take about a .130 overbore. Will have very thin walls by that point.

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06-02-2005, 11:07 AM

tdrumm

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Some have bored 5.3s out to stock LS1 size (3.9") after having the block checked, but that is the max you can go.

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06-02-2005, 11:09 AM

Reckless

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Yeah, I went .120 over on a 5.3, but I had the block checked for thickness. Came out to 3.900 after .120 over.

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06-02-2005, 11:53 AM

ktmrider

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Don't think the 4" pistons will go. I sonic checked pre-post on my 5.3L build, post thinnest was 0.157". Another 0.1" would be too much/thin IMHO.

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