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Generation III Internal Engine 1997-2006 LS1 | LS6
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Piston to valve clearance

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Old Nov 7, 2008 | 02:55 PM
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Default Piston to valve clearance
I am going to use a ls1 block 3.905" bore, Mahle flat top pistons with -4cc valve reliefs & 5.3 heads (706 head castings) i planned on running the chambers down to 59cc's and wanted to run a TR T-Rex cam. Anyone know if I would have piston to valve issues?
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Old Nov 7, 2008 | 03:21 PM
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The 4cc pistons will have more than adequate clearance for that setup. Some 0.040 cometics would be a nice addition as well.
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Old Nov 8, 2008 | 12:21 AM
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Your good. But check anyways for good measure though.
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Old Nov 9, 2008 | 12:43 PM
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What do you think about increasing vave size to a 2.02? will I see PTV clearance then or should I stick with the stock 5.3's valves?
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Old Nov 9, 2008 | 01:00 PM
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Originally Posted by Project382
What do you think about increasing vave size to a 2.02? will I see PTV clearance then or should I stick with the stock 5.3's valves?
You still should have plenty of depth and radial clearance with the 2.02 also.
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Old Nov 10, 2008 | 11:51 AM
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Cool! Thx guys!
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