View Single Post
  #9 (permalink)  
Old 01-25-2007, 04:27 PM
olddog olddog is offline
CC Member
Visit my Photo Gallery

 
Join Date: May 2006
Location: St. Louisville, Oh
Cobra Make, Engine: A&C 67 427 cobra SB
Posts: 2,445
Not Ranked     
Default

Quote:
Originally Posted by ted
On a new engine, engine output can initially be expected to be the same regardless of the ring design if the rings are seated properly and cylinder leakage kept the same. But over time, conventionally gapped rings will ultimately increase the ring end gap over 0.003" for each 0.001" of wear in the bore and this is where the gapless ring design will shine. Over the long haul, the gapless rings will maintain a better ring seal and hence, less cylinder leakage.
Well my first intuitive thought was 3:1 ring gap to bore increase is bull. Then I stopped and did the geometry in my head a minute, and I realized it is actually 0.00314 gap for each 0.001 in bore. Dah it's pie dummy (dummy being me). Wow, that is a very interesting point. Thanks for sharing.

I was reading on an engine builder's web site that they use gapless rings. They mentioned that they do a special proprietory mystical hone job to get these type rings to seal properly. Anything to that?

Last edited by olddog; 01-25-2007 at 04:29 PM..
Reply With Quote