The give away that this stuff might be snake oil
is the "coat crank counterweights for 115$"
Beware-Beware-Beware
Crank weights dont hit, rub, or slide
against anything. Is the poly supposed to
reduce windage of the crank spinning around
in air? I dont thing so.....
Just my naturally sarcastic/pessimistic
nature coming out here, happy to
eat crow if someone steps up to the
plate with proof it works.
Jim
Chesapeake Va
>From: "Paul" <9laser3@bright.net>
>Reply-To: "Paul" <9laser3@bright.net>
>To: <datsun-roadsters@autox.team.net>
>Subject: PolyDyn PD-14
>Date: Tue, 25 Jun 2002 14:48:52 -0400
>
> 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.
> >
> > thxx
> > Bob Davis
> > 67.5 2L
> > Vintage Racer
> > ----- Original Message -----
> > From: Carl Benton
> > To: Bob Davis
> > Sent: Monday, June 24, 2002 7:40 PM
> > Subject: Re: coatings
> >
> >
> > Bob
> >
> > First the machine work needs to be finished. Check the rod and main
>bearing
> > clearances,piston to cylinder wall clearances,valve job finished,valve
>guides
> > size for the new valves and make sure the cylinder head deck is true and
>flat.
> > Send your parts for coatings.
> >
> > Crankshaft counterweights coat with PolyDyn PD-14
> > Silver..........................................$ 115.00
> >
> > Camshaft coat with PolyDyn
> >
>DL..........................................................................
>.
> > ......$ 30.00
> >
> > Timing Chains coat with PolyDyn PD...
> > ea...................................................................$
>15.00
> >
> > Timing Gears coat with PolyDyn
> > DL..............................................................all 3
>for....$
> > 25.00
> >
> > Chain Guides and Chain tensioners do not coat.
> >
> > Cam Followers coat with PolyDyn
> >
>DL............................................................each.......$
> > 3.50
> >
> > Valve springs coat with PolyDyn
> > DL.......................................................per each
>pc.....$
> > 1.75
> >
> > Rod bearings coat with PolyDyn
> > DL......................................................set of 4
>jor........$
> > 16.50
> >
> > Main bearing set coat with PolyDyn
> >
>DL.........................................................................$
> > 33.00
> >
> > Piston coat skirts with PolyDyn RP,tops with PolyDyn HS comp
> > Gold.........each.............$32.00
> >
> > Cylinder head and valves coat with PolyDyn HS comp Gold combustion
>chambers
> > and exhaust ports,face of
> >
>valves......................................................................
>.
> > ..per chamber...........$ 35.00
> >
> > Best Regards
> >
> > Carl Benton, Polymer Dynamics Inc.
> >
> > 713-694-3296 office
> >
> > 713-694-6915 fax
> >
> >
> > Bob Davis <rdavis4@cfl.rr.com> wrote:
> >
> > I race a 2 litre 4 cylinder overhead cam Datsun roadster and am in the
> > process of an engine rebuild. Needless to say, new parts are scarce and
> > expensive, especially timing chain components. At what point in the
> > rebuild/machining should coatings be applied and what is the apprx.
>costs?
> >
> > - Crankshaft (5 main)
> > - Camshaft (new)
> > - 2 Timing Chains (new)
> > - 3 Timing Gears (new)
> > - 2 Chain guides (new). These have a hard rubberized surface the
>chains
>run
> > across.
> > - 2 Hydraulic Chain tensioners (new) - These have some kind of hard
> > rubberized blocks that the chains run across.
> > - 8 cam followers (rocker arms)
> > -Valve springs (dual)
> > - Rod and main bearing shells
> > - Forged pistons (new)
> > - 8 Valves (new)
> > - Cylinder head (aluminum)
> >
> > thxx
> > Bob Davis
> > 67.5 2L
> > Vintage Racer
> >
> >
> >
> >
> >
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