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Thread: LS3 4.125 Bore ??
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09-19-2008 #1
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LS3 4.125 Bore ??
I was wondering if an LS3 engine can be overbored to 4.125 ?
The factory finish bore is 4.065 .
So that would be .060 overbored.
So , my detailed question would be , can you overbore the stock sleeves that far or do you have to re-sleeve the block ???
I have a customer that wants to bore and stroke an LS3 .
My guess is he's going for a 427 cui.
I didn't know the answer so I thought I might try here.Last edited by JEFFTATE; 09-19-2008 at 11:43 AM.
Jeff Tate
U.S.A.
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09-19-2008 #2
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Not sure on the boring part but if I remember correctly you can use a 4.1" stroke to get to the 427 on a stock bore.
Originally Posted by JEFFTATE
yes, a 4.1" stroke on stock bore will make 427 cubes
http://www.sdparts.com/catalog/lsgen...kAssembly.aspx72 Nova SS, on the back burner for now.
current cruiser: "The green machine"
'70 Impala 4drht, 26K original miles, 2" drop springs and large swaybars, drives pretty good for a land yahct
in the middle of an ls1 swap, but thinking about changing directions to a duramax diesel swap.
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