5.3 overbore

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Feb 20, 2007 | 04:40 PM

inline300

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5.3 overbore

Lets say I want to purchase a 5.3.

Lets say I want to bore it .120 and drop stock LS1 pistons in it.

Im told this can be done on a 5.3 iron block, can this be done to the 5.3 aluminum block as well, without installing new sleeves?

Thanks

Feb 20, 2007 | 05:19 PM

GR33N GoblinM6

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you wont be able to take the sleeves .120 on an aluminium block.. sorry.. if you need 5.7, get a 5.7 it will be cheaper.

Feb 20, 2007 | 05:22 PM

slowride

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Yes, I believe they are the same block with more bore size on the 5.7. I remember some topics where people started out with a stock 5.3 aluminum block (stock sleeve) so they had room to true it up if needed.

Feb 20, 2007 | 05:27 PM

inline300

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So we have one no and one yes.

Do we have a tie breaker?

Thanks fellas

Feb 20, 2007 | 05:28 PM

cablebandit

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iron block yes...aluminum no idea

Feb 20, 2007 | 11:47 PM

GR33N GoblinM6

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from what i have read.. you can not take aluminum sleeves to that... i have read and heard you can have them honed.. but not bored out like you want to..

Feb 21, 2007 | 09:25 AM

NO-OPTION-2002

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Engine Masters had an article within the last 2-3 months were Tony Mamo built a 600+ (crank) hp 383, using a new 5.3L ALUMINUM block bored out to 3.898" with a 4" crank.

So yes, based on that info, I'd say it is very possible.