5.3 bore
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Teching In
Joined: Feb 2009
Posts: 42
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Hi my machine shop is bit worried bout taking it out that far I'm mainly thinking its a lot easier to get a dish piston to suit 3.905 with after market rod 6.125 927 pin don't seem to be able to find any thing to suit a 5.3 with after market rod if any body knows of a supplier that sells a 5.3 piston to suit let me know otherwise I'll go the 3.905bore
For boost you might as well keep as much liner thickness as possible and run a stock bore piston. You won't miss the extra cubes and at 3.905 the liner will be real thin by that point.
I was curious about that, but do not have near the technical knowledge to say anything. I was thinking why not put in a good rotating assembly, leave as much thickness as possible, and turn the boost up.
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I was thinking why not put in a good rotating assembly, leave as much thickness as possible, and turn the boost up.
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I punched a 5.3 to 5.7 and had no problems..
Plenty of people have and boosted the crap out of them..
Plenty of people have and boosted the crap out of them..
TECH Regular
Joined: Jun 2011
Posts: 420
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From: Milwaukee, Wi.
Why not keep it at 9.5:1? Stis comp. is still pretty boost friendly, especially with the forged pistons. You don't want to go to low on compression, might be a dog out of boost. IMO, I'd run 9.5 and a meth kit.
Restricted User
Joined: Mar 2014
Posts: 7,192
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From: Ohio
I thought the 5.3s and the 5.7s had the same bore spacing? So if you bore out the 5.3, it will have the same amount of material between the cylinders as the 5.7.
No point in boring out a block if you plan on cramming boost down it, though.
No point in boring out a block if you plan on cramming boost down it, though.
That logic would apply if it were a siamesed block, but it's not. Otherwise, you could bore a 5.3L block to 4.200" since it has the same bore spacing as an LSX block, but the LSX can go that far because it is siamesed.
Staging Lane
Joined: Feb 2014
Posts: 75
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From: Falkville, Alabama
