FYI: to all who responded.....PolyDyn is not an oil additive.
Bob Davis
67.5 2L
Vintage Racer
----- Original Message -----
From: "Hall, Phillip" <Phillip.B.Hall@MSFC.NASA.GOV>
To: "'Thomas - Sweden'" <csp311@telia.com>
Cc: <Bspark47@aol.com>; <9laser3@bright.net>;
<datsun-roadsters@autox.team.net>
Sent: Wednesday, June 26, 2002 9:13 AM
Subject: RE: PolyDyn PD-14
> Tested Duralube - actually decreased the performance of the oil in which
it
> was added. Snake Oil - very correct term.
>
> -----Original Message-----
> From: Thomas - Sweden [mailto:csp311@telia.com]
> Sent: Tuesday, June 25, 2002 5:07 PM
> To: Hall, Phillip
> Cc: 'Bspark47@aol.com'; 9laser3@bright.net;
> datsun-roadsters@autox.team.net
> Subject: Re: PolyDyn PD-14
>
>
> ...and now we have several hours on daytime TV
> with Duralube "snake oil". They are working hard to
> find the last suckers in every corner of the world.
>
> Thomas
>
> Hall, Phillip wrote:
>
> > Ok - I will bit on this one. PTFE (Teflon) in oil is a no-no. It plugs
> > filters (why the FAA has ban it) and under high pressure and heat (cam
> > lobes) it sublimes to a fluorine that is abrasive. Also, PTFE can not
> > physically penetrate metal.
> >
> > Using a dry film lubricant on other engine parts - ok on some parts. I
> > worked with Chrysler on their NASCAR motors as they started back into
> > NASCAR. They were looking for a dry film lubricant for the piston
skirts.
> > They were having wear problems. A DFL was selected - would not tell me
> > which one - I think it was Teflon based -most candidate DFLs were. I
have
> > tested many PTFE DFL's and they do not meet the requirements for space
> use.
> > As a side - In 2000, Nissan started putting DFL on the piston skirts of
> the
> > VG motors.
> >
> > So, putting a DFL on the skirts does help. Putting a PTFE DFL on cam
> lobes
> > and lifters will only last minutes. Combustion chambers -seconds.
Timing
> > gears - mmm for a while.
> >
> > I work with DFLs everyday and have given their use in motors and other
> auto
> > applications some thought. The next time I build a motor I will most
> likely
> > put some DFL on the piston skirts. I need to run wear tests with DFLs
in
> > motor oil to check compatibility with the binder system and insure a
good
> > wear life.
> >
> > I think the best think you can do for your Roadster motor is run a
> synthetic
> > motor oil. Stay away from snake oils- none improve wear life. Watch
out
> > for vendor clams. We have lost satellites because of engineers
believing
> > faults clams and not putting the product through the right tests.
> >
> > Have a great Roadster day!! and watch your wallet:)
> >
> > Phil
> > SEROC
> >
> > -----Original Message-----
> > From: Bspark47@aol.com [mailto:Bspark47@aol.com]
> > Sent: Tuesday, June 25, 2002 2:19 PM
> > To: 9laser3@bright.net; datsun-roadsters@autox.team.net
> > Subject: Re: PolyDyn PD-14
> >
> > That was my VERY first thought! And AJ Foyt seems happy to endorse just
> > about
> > any snake-oil that comes along ("Make sure you spell the name right on
the
> > check, bub") so he isn't exactly the Shining Tower of Credibility
anyway.
> >
> > skeptically,
> >
> > Bill
> > 70
> >
> > in a message dated 06/25/2002 11:52:14 AM Pacific Daylight Time,
> > 9laser3@bright.net writes:
> >
> > > Is anybody else reminded of Slick50? Since NHRA, CART, & NASCAR
> > rebuild
> > > engines every day, why would they car about long life?
> > >
> > > Paul
> > > ----- Original Message -----
> > > From: Bob Davis <rdavis4@cfl.rr.com>
> > > To: <datsun-roadsters@autox.team.net>
> > > Sent: Tuesday, June 25, 2002 7:38 AM
> > > Subject: Engine rebuild: coatings
> > >
> > >
> > > > I am in the process of rebuilding the engine for my racer and was
> > turned
> > > onto
> > > > a company that impregnates a polymer coating into/onto a variety of
> > engine
> > > > components. The most significant benefit being the reduction of
> engine
> > > heat
> > > > that effects and reduces the life of expensive parts. In the case
of
> a
> > U20
> > > > engine it will virtually eliminate chain stretching. The
information
> > > > originally came from Malvern Racing, David Webber,
> > www.malvernracing.com,
> > > a
> > > > long time Datsun/Nissan racer and race car preparer located in
> Virginia
> > > (by
> > > > the way, if you need forged pistons, Malvern has them in stock).
The
> > web
> > > site
> > > > for the coating company is www.polydyn.com. In the message stream
> below
> > > are
> > > > quotes for doing a variety of engine components for the U20 engine.
> >
> > /// datsun-roadsters@autox.team.net mailing list
> > /// Send admin requests to majordomo@autox.team.net or go to
> > /// http://www.team.net/cgi-bin/majorcool
> > /// Send list postings to datsun-roadsters@autox.team.net
> >
> > /// datsun-roadsters@autox.team.net mailing list
> > /// Send admin requests to majordomo@autox.team.net or go to
> > /// http://www.team.net/cgi-bin/majorcool
> > /// Send list postings to datsun-roadsters@autox.team.net
>
> /// datsun-roadsters@autox.team.net mailing list
> /// Send admin requests to majordomo@autox.team.net or go to
> /// http://www.team.net/cgi-bin/majorcool
> /// Send list postings to datsun-roadsters@autox.team.net
/// datsun-roadsters@autox.team.net mailing list
|