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Max depth flycutting stock Ls1 pistons?

Generation III Internal Engine 1997-2006 LS1 | LS6

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Max depth flycutting stock Ls1 pistons?

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Mar 5, 2018 | 12:41 PM

#1

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Max depth flycutting stock Ls1 pistons?

Just like title says. How thick is the piston?

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Mar 5, 2018 | 01:59 PM

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I have no personal experience with this, however I believe I've read older posts where guys have cut .100 with no I'll effects. If you've ever seen a chipped piston, you'll notice that they are fairly thick up top. I'd imagine that you could go more than .100, but I don't know how reliably.

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Mar 5, 2018 | 02:49 PM

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I'd be more worried about making the top ring groove edge too close to the top of the piston, as that's less distance then the thickness of the crown.
OOPS! I thought you were discussing milling the piston tops! My bad!

Last edited by G Atsma; Mar 6, 2018 at 12:51 PM.

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Mar 5, 2018 | 03:22 PM

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I've personally done the .100" mentioned above. Doesnt even get close to the edge of the piston as mentioned above either with 2.02"/1.60" valves and cutters. I'll see if I can find a pic

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Mar 5, 2018 | 04:44 PM

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Only way to be sure is sonic them thoroughly before they go under the knife.. and +1 above note!

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Mar 6, 2018 | 01:17 AM

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dreadpirateroberts

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i think there's (very) roughly .250" of material before it would break through. not that you should ever, ever get anywhere close to that.

i'd be wary of going .100 in.

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Mar 6, 2018 | 11:42 AM

#7

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Thanks for the info, not sure how much I need to cut yet. Once I get the cam and lifters I’ll be able to measure. Hopefully I won’t need to cut out a lot.

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