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gains from a 4 inch bore

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gains from a 4 inch bore

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Old

Apr 1, 2011 | 06:01 AM

#1

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TECH Junkie

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From: Wilmington, DE

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gains from a 4 inch bore

Wat kind of gains would i see if i bored my 1998 ls1 from the 3.896 bore to a 4.000 inch? Its possible even tho the walls r thin rite

Old

Apr 1, 2011 | 06:14 AM

#2

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Not possible, without sleeving. 3.905 is as big as you can go.

Old

Apr 1, 2011 | 06:42 AM

#3

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TECH Junkie

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Ok i figured i was reallystretchin it.

Old

Apr 4, 2011 | 01:21 PM

#4

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From: Blue Springs, Missouri

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get an ls2 block

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Apr 4, 2011 | 06:48 PM

#5

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From: Chillicothe/Lima, Ohio

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on 97-98 blocks, 3.903 is max.

99+ 3.908 is max but pushing your luck. 3.905 is usually said to be max.

Old

Apr 4, 2011 | 10:45 PM

#6

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im with the posters above

Old

Apr 5, 2011 | 01:08 AM

#7

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From: Huntsville, AL

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Quote:

Originally Posted by Floorman279

Ok i figured i was reallystretchin it.

At 4.0 I think you would be running on virgin aluminum cylinder walls.

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Old

Apr 5, 2011 | 06:54 AM

#8

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Ls2 block is my vote,

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Apr 5, 2011 | 08:01 AM

#9

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From: Baxter,KY.

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Like said above, Get a LS2 block they are 4.00" bore from the factory, I have a LS2 in my car right now and its bored .030" over (4.030") But a LS1 can not be bored that big, the sleeve are just to thin, .005" is about max. And you can not bore any LS block .104" over like your wanting to do with factory sleeves.

Last edited by Randy WS6; Apr 5, 2011 at 08:07 AM.

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