what is the max overbore on a stock LS1 block?

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08-26-2003, 07:09 PM

B18B1LS1

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what is the max overbore on a stock LS1 block?

Is it safe to go .010 over on a stock block WITHOUT resleeving it? It will see ALOT of spray if that makes a difference. Thanks!

Jeffrey

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08-26-2003, 08:23 PM

someday

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Re: what is the max overbore on a stock LS1 block?

if ur talking about ur '98, no, '97/'98 blocks could not be bored, and '99+ can go 10 over...

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08-26-2003, 09:06 PM

B18B1LS1

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Re: what is the max overbore on a stock LS1 block?

well crap, that sucks...thanks for the info

Jeffrey

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08-26-2003, 09:15 PM

Louis

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Re: what is the max overbore on a stock LS1 block?

had no problems on our 98 blocked solid roller at 12 over.

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08-26-2003, 11:11 PM

pekkaz

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Re: what is the max overbore on a stock LS1 block?

'98 Helms manual says the block can be honed(but not bored).010 and service piston is available. I don't know what's behind everybody saying '98 can only take .005 hone. Chris Endres even puts it .004

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08-27-2003, 07:45 AM

Ragtop 99

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Re: what is the max overbore on a stock LS1 block?

I'd go only .005 over with heavy spray. The extra displacement is nothing and you never know when you'll be rebuilding it again and need another .005 for another hone.