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
|