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safe bore size

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Old Jun 30, 2020 | 02:43 PM
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Default safe bore size
So I am starting my ls1 5.7 project with a d1sc.. The machine shop i use has a block all ready to go. Bore is 3.908. I have been told that 3.905 was max safe bore and 3.903 was even better. I know the piston selection for 908 bore is almost nothing but a 905 bore has a bunch of choices. Looking for everyones opinion on what is acceptable and safe. tia
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Old Jun 30, 2020 | 08:46 PM
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Order shelf or custom pistons designed for that 3.908 bore and just keep in mind that there's nothing left in the cylinder walls to go any bigger after that.
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Old Jun 30, 2020 | 10:17 PM
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How much boost are you planning to run in this setup?
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Old Jul 1, 2020 | 02:14 AM
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It’s hard to believe that .0025” less sleeve thickness is going to matter.
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Old Jul 1, 2020 | 09:28 AM
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14 to 15 psi eventually
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Old Jul 1, 2020 | 11:09 AM
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Tune will kill it before the difference in bore thickness will.
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Old Jul 1, 2020 | 12:53 PM
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Originally Posted by RonSSNova
It’s hard to believe that .0025” less sleeve thickness is going to matter.

My math isnt the best but i came up with .0015 sleeve thickness? 3.908 - 3.905 = .003 divided in half because each side contributes half to the measuremant...so .0015 difference. 1.5 thousandths is nothing.....
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