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2013-14 Shelby GT500
Built engine time.
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<blockquote data-quote="biminiLX" data-source="post: 16786708" data-attributes="member: 7795"><p>I don’t want to answer for Steve but my experience is that a USED 5.8 block must be checked very carefully if you’re going to rebuild.</p><p>I used a new 5.8 bought thru JDM as the basis of my JDM 5.8 short block. Mine is stil going strong after 4yrs, currently at 1110rwhp SAE. I check an oil analysis twice a year with the last in November ‘21 and still good.</p><p>My tuner built my used block for his personal vehicle after checking the cylinder bore spec (not ‘out of round’) and coating thickness. His survived lots of street abuse finally at 1000rwhp and close to 1100rwhp on spray. Car was sold and still going strong from what we know.</p><p>A local friend rebuilt his used 5.8 block after being told it was good without sleeving and had failure during break in ultimately requiring a second rebuild hook with sleeving. Now a badass sleeved and ported longblock that’s going to make big power.</p><p></p><p>My point would be unless you’re starting with new block or committed to sleeving, you won’t know if you can get away without sleeving until you inspect and measure.</p><p>-J</p></blockquote><p></p>
[QUOTE="biminiLX, post: 16786708, member: 7795"] I don’t want to answer for Steve but my experience is that a USED 5.8 block must be checked very carefully if you’re going to rebuild. I used a new 5.8 bought thru JDM as the basis of my JDM 5.8 short block. Mine is stil going strong after 4yrs, currently at 1110rwhp SAE. I check an oil analysis twice a year with the last in November ‘21 and still good. My tuner built my used block for his personal vehicle after checking the cylinder bore spec (not ‘out of round’) and coating thickness. His survived lots of street abuse finally at 1000rwhp and close to 1100rwhp on spray. Car was sold and still going strong from what we know. A local friend rebuilt his used 5.8 block after being told it was good without sleeving and had failure during break in ultimately requiring a second rebuild hook with sleeving. Now a badass sleeved and ported longblock that’s going to make big power. My point would be unless you’re starting with new block or committed to sleeving, you won’t know if you can get away without sleeving until you inspect and measure. -J [/QUOTE]
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2013-14 Shelby GT500
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