[Diy_efi] Thermal barrier coatings

[arnie]

> Teflon advocate folks are quick to point out that if Teflon is
> THAT slippery what do you care if it sheds the oil?  A good
> question.

I have a very good answer.  Oil has two responsibilities in the
engine.  Lubrication and cooling.  Any surface that is heated by
either the combustion process or friction uses oil for cooling.
If those surfaces repel oil, oil will no longer be effective to
remove heat.

GAS

----- Original Message -----
From: "John Stricker" <jstricke at rwisp.com>
To: "List for general do-it-yourself EFI talk" <diy_efi at diy-efi.org>
Sent: Tuesday, January 21, 2003 8:38 AM
Subject: Re: [Diy_efi] Thermal barrier coatings
>
> I've heard from several places that Teflon is not the way to go.
> Teflon repels oil (along with everything else) and it's so slippery that
> the oil will not stay on it.  Moly disulfide is the second most popular
> coating, and it retains oil.  Now all of this is from people trying to
sell
> me something, of course, and the Teflon advocate folks are quick to
> point out that if Teflon is THAT slippery what do you care if it sheds
> the oil?  A good question.  But then again, if Teflon works that well,
> why not coat everything with it and not run any oil at all??
>
> John Stricker
> ----- Original Message -----
> From: "Greg Hermann" <bearbvd at mindspring.com>
> To: "List for general do-it-yourself EFI talk" <diy_efi at diy-efi.org>
> Sent: Tuesday, January 21, 2003 8:10 AM
> Subject: Re: [Diy_efi] Thermal barrier coatings
>
> > Among the more interesting coatings I have come acrross are
> > from Ni-Met Industries (Gary, Ind.)
> >
> > They do a teflon impregnated anodizing (RC 70 surface hardness
> > and _VERY_slippery) which is neat for pistons (skirts, pin bores
> > and ring grooves).
> >
> > Also, a teflon impregnated carbide coating (also very hard and
> > slick) for brass/bronze/copper alloys which might be pretty
> > interesting for the ID of valve guides and possibly also for con
> > rod small end bushings.
> >
> > Greg





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