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| .50mm oversized piston rings | |
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| Tweet Topic Started: Oct 26 2012, 11:51 PM (1,517 Views) | |
| mecevans | Oct 26 2012, 11:51 PM Post #1 |
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Elite Member
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I have tried Hastings and Engine-tech (Probably the same as DNJ) piston rings but the top ring gap is at .018" out of the box. Gap should be .008-.016" top and bottom ring. Anyone have advice on a brand that will be in spec? I'm going to call a GM dealer for availability on factory rings. |
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| starscream5000 | Oct 27 2012, 12:12 AM Post #2 |
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Got 70 MPG?
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Evergreen. Mine gapped from .0008"-.0010" on all 3 rings.
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| mecevans | Oct 27 2012, 12:56 AM Post #3 |
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Elite Member
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Rule of thumb is .004" x bore top and oil ring, .005" x bore 2nd ring. So for me with a 2.91" bore, .012" top and .015" 2nd. |
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| starscream5000 | Oct 27 2012, 03:20 PM Post #4 |
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Got 70 MPG?
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Then get Evergreen rings and file them down to your heart's content... |
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| Turbo Dan-O | Oct 27 2012, 03:51 PM Post #5 |
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Obsessive Car Detailer
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I have been playing with different ring gaps for years now. There are a lot of factors to think about but just make sure that you have enough gap! I ran some MONSTER ring gaps on an engine that I knew was going to see lots of boost and a good shot of nitrous. Never used any oil or had any compression issues at all.
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| mecevans | Nov 4 2012, 09:04 AM Post #6 |
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Elite Member
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Got the evergreens and they gapped. 010" out the box! |
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| starscream5000 | Nov 4 2012, 11:25 AM Post #7 |
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Got 70 MPG?
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| paul11211 | Nov 5 2012, 05:19 AM Post #8 |
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Are you guys talking about the gap between the ring and grove in the piston? Thanks. |
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| mecevans | Nov 5 2012, 12:26 PM Post #9 |
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Elite Member
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This is piston ring end gap
Edited by mecevans, Nov 5 2012, 12:27 PM.
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| starscream5000 | Nov 5 2012, 04:12 PM Post #10 |
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Got 70 MPG?
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3:18 AM Jul 11