I believe that Porsche (at least for the pancake engines) uses Nikasil or similar (what BMW has used on motorcycle engines for at least 15 years). Ferrari does so on the F355. BMW used them in some of their cars (recent vintage 540 V-8's), and had serious problems with the sulfur in US gasoline causing deterioration of the plating - oddly enough, this problem did not impact the motorcycle side of the house. Dunno why.
Nikasil technology is owned by Mahle. See <http://www.finishing.com/1600-1799/1671.html>, <http://www.mahle.com> (best if you can read German, although there is an English version of the site, once you find the link for it) for more info. Tom Coradeschi [email protected] > ---------- > From: David E. Ingold > Reply To: David E. Ingold > Sent: 02 January 2000 04:32 PM > To: Coradeschi, Tom [AMSTA-AR-FSP-G]; A2-16V; [email protected] > Subject: Re: Teflon Piston Rings > > Unless we have something we can use from a crashed UFO, no. Teflon is > just > plastic and wouldn't hold up. One thing that reduces the friction in the > cylinder lining is to chrome plate them. They do this on better aircraft > engines. They aren't shiny like an old cadilac bumper, but they looked > like > cracked glass. The current is reversed in the chroming process to give > the > cracked appearance. This helps the oil stick to the cylinder walls. > > Does anyone know if MB, BMW, or Porsche chromes the cylinders walls. > > Dave. > '90 GLi > > ----- Original Message ----- > > : No. > : > : Tom Coradeschi > : [email protected] > : > : > ---------- > : > From: Mark Reda > : : > > : > Is there such a thing as Teflon Piston Rings? > : > Would it actually be a friction-less combustion chamber? > > > > _____________ > List Sponsor: http://www.netsville.com > To remove yourself from this list, send mail to [email protected] > with 'unsubscribe a2_16v' in the body of your message > See us on the web at http://www.a2-16v.com > Visit the 16V Homepage at http://www.gti16v.org > > _____________ List Sponsor: http://www.netsville.com To remove yourself from this list, send mail to [email protected] with 'unsubscribe a2_16v' in the body of your message See us on the web at http://www.a2-16v.com Visit the 16V Homepage at http://www.gti16v.org
