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Join Date: Aug 2002
Location: Galivants Ferry, SC
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Piston Rings
Can someone here help me down memory lane?....
 In Bruce Anderson's Performance handbook...or maybe one of his similar-sounding responses to Excellence magazine.... he cautions against use of certain brand name piston rings in rebuilds....was it Goetze?. If so, seems odd as aren't they OEM fitment?...or at least equivalent? Anyone recall this theme? Similar concerns based on their own experience?
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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10-29-2010, 08:14 AM
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Location: Nash County, NC.
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Goetze are the factory rings
Deves are the junk that is too hard on the cylinders I have the book but dont remember. I do the Goetze after glaze breaking the nikilsil. I wont rering the alucil because of seating problems and glaze thickness. Bruce |
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10-29-2010, 09:32 AM
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Thanks, Bruce....I think it was Deves he mentions....maybe others will recall too, just to finish this off. Good call.
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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10-29-2010, 10:42 AM
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Location: Atlanta
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NPR is what JE and Wiseco use now. Awesome rings, and they are surprisingly cheap.
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10-29-2010, 11:43 AM
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If JE is using NPR rings now, what are the JE Pro Seal Rings that they are including with new Piston sets today?
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Mark Jung Bend, OR MFI Werks.com |
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10-29-2010, 12:28 PM
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I think the Pro Seal Rings are gapless. Meaning they come big and need to have the ends filed to exactly fit your cylinder.
Chris 73 911 E |
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10-29-2010, 12:36 PM
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Quote:
This info was coming from the guy (cant recall his name!) in the Euro/exotic car dept and from Brian Nutter at Wiseco. The JE pro seal rings are NPR rings.
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No physical quantity completely explains its own existence |
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10-29-2010, 01:00 PM
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Location: Portland Oregon
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Quote:
ALL rings should be measured and individually fitted for each cylinder.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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10-29-2010, 04:00 PM
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Is there anything to custom fit with regular rings? I just installed a set of what ever comes from EBS Racing for JE pistons. Fit into the cylinders no problem. I assume they are the right size.
They obviously don't need filing so nothing to be done....right? Chris |
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10-31-2010, 05:48 PM
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I had to cut a whole set of Goetze rings on JEs last year to get the gaps that I needed for spec.
Bruce |
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10-31-2010, 07:36 PM
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1957 Porsche 356 A Coupe 2.7 Short Stroke
1972 Porsche 72 Coupe
