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Generation III Internal Engine 1997-2006 LS1 | LS6
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Old Nov 27, 2006 | 09:10 PM
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Default 370ci
what is a 370. what does it start as 5.7 , 6? iron, aluminum? and do i bore it? please help
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Old Nov 27, 2006 | 09:35 PM
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370 is a iron 6l block bored .030 over using stock crank
Last edited by wildta; Nov 28, 2006 at 11:52 AM.
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Old Nov 27, 2006 | 10:04 PM
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what would be the cubic inches of a 5.7 346ci motor be i it was bored over .30 and running the stock cranck?
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Old Nov 27, 2006 | 10:07 PM
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Originally Posted by 1999 SS
what would be the cubic inches of a 5.7 346ci motor be i it was bored over .30 and running the stock cranck?
You cant bore the 5.7 aluminum block that far over, most is .010 and that makes it a 348.
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Old Nov 27, 2006 | 10:08 PM
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Originally Posted by 1999 SS
what would be the cubic inches of a 5.7 346ci motor be i it was bored over .30 and running the stock cranck?

well considering you shouldnt bore ANY motor .30 over.... i think you mean .030 over..

LS1 aluminum engines should NOT be bored.. they are sleeved.. and you can not take .030 off of the sleeve on an LSx based aluminum engine. i think I have seen some one mention that the biggest you can take it to would be .010 over... if that.. and most people wouldnt even do that.
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Old Nov 28, 2006 | 08:11 AM
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not to hijack this thread but, all the kits that i look into call for a 3.905 bore and a different crank(347,474, 383) now im talking building a stroker engine. but i measured my cylinder walls and came to the conclusion that i need to machine out .0074. can this be done safely with no worries?
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Old Nov 28, 2006 | 08:12 AM
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usual is 3.905 bore max on 99+
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