I think we are a number of reasons to use this stuff. With all the
different color coatings that they are recommending I believe that the
whold idea is to make the inside of the engine really pretty. When you
have to scrap the engine you don't have to throw it away, just section it
and put it on your coffee table as art!
It may also be that they list the different color and what they coat with
each color so the beginner race engine builder will be able to tell the
difference between a crankshaft (silver) and a piston (gold)!
Peace,
Pat
- Support Habitat for Humanity, A "hand up", not a "hand out" -
Pat Horne, Network Manager, Shop Supervisor, Future planner
CS Dept, University of Texas, Austin, Tx. 78712 USA
voice (512)471-9730, fax (512)471-8885, horne@cs.utexas.edu
On Wed, 26 Jun 2002, Jim Cawrse wrote:
> 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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