5.3 boring out
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TECH Apprentice
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From: Mexico
5.3 boring out do you think boring out a 5.3L to 6.0L (101.6mm - 4.000inch) will be safe? i mean will cylinders still have good thickness in the wall? let's say we're planning to make 600 hp. do you guys recommend this?
On The Tree
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From: Glendale, Arizona
Why not just buy a 6.0L? I think the walls would be way to thin for that, you'll need sleeves which aren't cheap, so the total cost of boring, sleeving ,and everything else will probably be over the cost of a 6.0L.
Thread Starter
TECH Apprentice
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From: Mexico
i know that guys, i'm not saying i'm doing it, just wanted your opinion cause there are some ppl that have done this before, personally believe bored cylinders are too weak for perfomance, so i appreciate your inputs.
Can't be done. The wall thickness for a 5.3 just isn't there. The sleeves for the 5.3 and LS1 are basically the same. So you can bore them to 8.906 but that's the limit.
Yes there was a thread in this forum a while back where I think the op said He bored a 5.3L to 4.006" and sonic checked and He said there was more wall left than a first gen 350 .060" over . Iron blocks of course .
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Thread Starter
TECH Apprentice
Joined: Aug 2010
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From: Mexico
yeah, i remember that thread too, so this is kinda confusing, some say it can't be done and that sonic says 5.3 bored to 4.006 has more wall than a 350 gen I, so what???
Absolutely no way that's possible! This had been gone over countless times on here and the safest you can do is 3.905 and some people bore them to that, have them checked afterwards, and the walls are too thin to run it. Depending on your plans a 5.3 without being bored out will support 600hp, but not necessarily on stock internals. Although that has been done too
I wouldn't recommend taking a 5.3 that far. There are lots of things you "can" do and that some people do without issue, but a 5.3 block just isn't the right tool for the job when a 4" bore is desired.
-Jesse
-Jesse
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Great question. That's been bounced around the forums for awhile now without a definitive answer. Probably best to have an individual block sonic tested regardless of being Gen 3 or 4 if you are going for a max bore.
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From: Mexico
On The Tree
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The block man where I work has 30+ years experience and I asked him this same question. He told me he had a 5.3 iron block with a busted cylinder to test out so he bored all the good cylinders to 4.000", then started cutting them again 'till he hit water. He told me most hit water after about another 0.160" and one was around 0.180". Most everyone says this can't be done, maybe this was a freak block, I don't know.
What I do know is I'm going to have him cut out a 5.3 block and we're going to press in some nodular iron sleeves for a 4.125" bore. Why? 'Cause I already have the block, I get the sleeves at cost, and the labor is free. That's a lot cheaper than a X block. This will be nat. aspirated, if it was forced induction I probably wouldn't do it.
What I do know is I'm going to have him cut out a 5.3 block and we're going to press in some nodular iron sleeves for a 4.125" bore. Why? 'Cause I already have the block, I get the sleeves at cost, and the labor is free. That's a lot cheaper than a X block. This will be nat. aspirated, if it was forced induction I probably wouldn't do it.
Thread Starter
TECH Apprentice
Joined: Aug 2010
Posts: 333
Likes: 0
From: Mexico
The block man where I work has 30+ years experience and I asked him this same question. He told me he had a 5.3 iron block with a busted cylinder to test out so he bored all the good cylinders to 4.000", then started cutting them again 'till he hit water. He told me most hit water after about another 0.160" and one was around 0.180". Most everyone says this can't be done, maybe this was a freak block, I don't know.
What I do know is I'm going to have him cut out a 5.3 block and we're going to press in some nodular iron sleeves for a 4.125" bore. Why? 'Cause I already have the block, I get the sleeves at cost, and the labor is free. That's a lot cheaper than a X block. This will be nat. aspirated, if it was forced induction I probably wouldn't do it.
What I do know is I'm going to have him cut out a 5.3 block and we're going to press in some nodular iron sleeves for a 4.125" bore. Why? 'Cause I already have the block, I get the sleeves at cost, and the labor is free. That's a lot cheaper than a X block. This will be nat. aspirated, if it was forced induction I probably wouldn't do it.
The block man where I work has 30+ years experience and I asked him this same question. He told me he had a 5.3 iron block with a busted cylinder to test out so he bored all the good cylinders to 4.000", then started cutting them again 'till he hit water. He told me most hit water after about another 0.160" and one was around 0.180". Most everyone says this can't be done, maybe this was a freak block, I don't know.
What I do know is I'm going to have him cut out a 5.3 block and we're going to press in some nodular iron sleeves for a 4.125" bore. Why? 'Cause I already have the block, I get the sleeves at cost, and the labor is free. That's a lot cheaper than a X block. This will be nat. aspirated, if it was forced induction I probably wouldn't do it.
What I do know is I'm going to have him cut out a 5.3 block and we're going to press in some nodular iron sleeves for a 4.125" bore. Why? 'Cause I already have the block, I get the sleeves at cost, and the labor is free. That's a lot cheaper than a X block. This will be nat. aspirated, if it was forced induction I probably wouldn't do it.
