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On Sun, 2002-09-08 at 20:44, Jim Adney wrote: > On 7 Sep 2002, at 22:40, Keith Park wrote: > > > BTW, I just mailed John an article from NASA Tech Briefs about > carbon/carbon composite pistons and cylinders. They are experimenting with > these because they can be made with very tight clearances because they > expand and contract the same. The clearances are so tight that it appears > that rings are not necessary, and emissions are reduced because the dead > space outside the piston and above the rings is eliminated, because of the > tight clearances again. > > The article caught my attention because the engine construction was the > same as ours: the cylinders are just clamped between the head and the > case by long studs. > Mahle is making some pistons with carbon fiber imbeded in the skirts for a wear surface. We have some samples at work. Jim, can you forward that article to me too. -- Russ Wolfe '66 FB MT (It drove) '71 FB AT '65 Bug (not running) russw@classicvw.org http://www.classicvw.org ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/