5.3 block the same as 5.7?
Thread Starter
Staging Lane
Joined: May 2002
Posts: 80
Likes: 0
From: ca
5.3 block the same as 5.7? does the 5.3 block have the same bore as the 5.7 ls1? or does it have the same crank? my bud has a truck with the ls1 5.3 and would like to know , my thiught is that if it has the same bore then you could use the 5.7 crank to make it in to a 350, which would be bad ***,,,, any one ever heard of this before?
thanks
thanks
Re: 5.3 block the same as 5.7? Crank is the same, but the bore size is smaller. You can overbore up to 3.910 (.125 over), which will net a 352 cid motor. With properly done 5.3 heads, 400+ hp is very possible without any power adders.
Thread Starter
Staging Lane
Joined: May 2002
Posts: 80
Likes: 0
From: ca
Re: 5.3 block the same as 5.7? blownmero i hate your *****... <img border="0" alt="[Fluffy]" title="" src="graemlins/fluffy.gif" />
<small>[ August 19, 2002, 03:01 AM: Message edited by: tbone4232 ]</small>
<small>[ August 19, 2002, 03:01 AM: Message edited by: tbone4232 ]</small>
Re: 5.3 block the same as 5.7? Hey Todd how did you do your calcualtion on displacment?
when i do the .010 over (3.910 bore, 3.62 stroke)
i get 348ci
using this.
http://www.rosspistons.com/CR%20Calculator.htm
when i do the .010 over (3.910 bore, 3.62 stroke)
i get 348ci
using this.
http://www.rosspistons.com/CR%20Calculator.htm
Re: 5.3 block the same as 5.7? Trending Topics
TECH Enthusiast
Joined: Nov 2001
Posts: 617
Likes: 0
From: Milford, Ohio
Re: 5.3 block the same as 5.7? The 5.3 block is cast iron, while the LS1 motors use an aluminum block. That's probably the biggest difference right there. The 5.3 blocks are 96.01 X 92.00mm (bore x stroke), the LS1 is 99.00 x 92.00 mm.
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Verdad Gallardo Re: 5.3 block the same as 5.7? My bad guys <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> George is right...the 5.3 uses the same crank as the LS1. Everything is interchangeable on the outside. There is one missing bolt hole for the alternator on the 5.3 block (center hole for bracket). Mine had no issues with only two bolts in the alternator.
Todd
Todd
