Re: [T3] Running in new Pistons

["Mark Seaton" <mark.seaton2@ntlworld.com>]

----- Original Message -----
From: "Jim Adney" <jadney@vwtype3.org>
To: <type3@vwtype3.org>
Sent: Monday, September 22, 2003 3:46 AM
Subject: Re: [T3] Running in new Pistons


> On 21 Sep 2003 at 20:49, BOB2TYPE3S@aol.com wrote:
>
> > Mark wrote:
> > > I found this link though:
> > >http://www.unitn.it/internazionale/area_ric/progetti/nano_vhof.htm that
> > >suggests that Osvat are pioneering in new technologies so can they be
> > >that bad?
> >
> > I've never heard of them, so you might be on your own here. Most people
just
> > put in stainless steel exhaust valves and call it done.
>
> I don't know what the deal is with stainless. It's really not a better
high
> temp material. Its only real claim to fame is that it doesn't rust. Things
may
> have changed, but I asked Dee Berg about them many years ago and she said,
> "Never for street use." I really don't know any more about them than that.
>
> I've never used any of them.
>
> I've also never heard of Osvat.

Thanks Jim. Will try to find out more- theres not much on the net about
Osvat! Its a shame Dee Berg didn't give a reason!
I'm no metalurgist but I think that stainless steels have far more of a
claim to fame than just not rusting? I know that most machinists hate to
work them because of their toughness/work hardening properties. Toughness
sounds like a good property for a valve, but work hardening maybe not.

Mark,
'73 Fasty,
London


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