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Registered
Join Date: Oct 2004
Location: Victorville, CA
Posts: 140
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Ring End Gap 2.7 Race Engine
I'm in process of building up a high compression (11:1 calculated) mechanically injected 2.7L for some club racing. Engine machine work is done and I have brand new J&E pistons (89.992mm/3.534") made for the cylinder bores (90.017mm/3.544"). Cylinder wall clearance is good @ .035mm/.001". Problem is with the new Goetze rings I got with with the rebuild kit from EBS (not their fault). When measured near the bottom of the cylinder bore (as recommended), the ring end gaps ranged as follows:
Top Ring: from .016" to .019" Mid Ring: from .013" to .018" Oil Ring: from .017" to .023" So the problem is that initial ring gap for most will be larger than recommended spec but well under the wear limit. Can I set each ring (top, middle, oil) to match the largest of the group and be ok? Thanks for your comments. Gerry
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Gerry 930 slantnose (previous) 996 Carrera 4 (current) 1979 Trans Am (fully restored/current) 1977s track car project (current) |
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08-04-2012, 07:10 PM
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Join Date: May 2008
Posts: 726
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Not sure of the question but it seems to be typical that the ring gap is bigger than what new should be. Here are a few posts of mine on a similar issue.
Piston rings, wrist pin & rod bush New Mahle pistons/cylinders 2.7 |
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08-05-2012, 10:13 PM
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Registered
Join Date: Oct 2004
Location: Victorville, CA
Posts: 140
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Ring End Gap
Thanks for the links. This seems to be a common occurance.
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Gerry 930 slantnose (previous) 996 Carrera 4 (current) 1979 Trans Am (fully restored/current) 1977s track car project (current) |
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08-06-2012, 10:28 AM
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