I always made more power with cast pistons ( good quality) for the reason
that you could run a closer bore clearance and generally they were quite a
bit lighter. Problems only when the ignition timing was neglected ( checked
carefully) But then, this was in the days of old when they had just invented
dirt. By the way most regulations allowed a .040" overbore .
----- Original Message -----
From: Ted Schumacher <tedtsimx@q1.net>
To: Bob Lang <LANG@isis.mit.edu>
Cc: <fot@autox.team.net>
Sent: Thursday, January 06, 2000 4:34 PM
Subject: Re: Piston Question
> Bob Lang wrote:
> >
> > Hi,
> >
> > I'm getting ready to start building my next motor. This would be
> > semi-ironic in that I actually haven't started the primary motor yet...
> > but I never do things in the general linear fashion anyway.... so...
> >
> > This one will be around 12.5:1 compression ratio. I've got the block at
> > the shoppe, and there's a slight taper to the bore - so a re-bore seems
to
> > be in order. Seeing that I'm boring anyway - I might as well "open it
up"
> > to a .030 overbore or whatever.
> >
> > I'm looking for the collective list wisdom regarding whether I should
use
> > cast or forged pistons for this job. I'm also seeking advice about
> > ceramic coating etc.
> >
> > If I need forged pistons, I'll also need a source of new income...
unless
> > someone can elighten me on an inexpesive source of forged pistons. I'd
> > also like to hear any experience with hyper-utectic (sp??) pistons, as
> > they are sort of in-between cast and forged, cost wise as near as I can
> > figure from reading my books on the topic.
> >
> > Thanks in advance.
> > rml
>
> --------------------------------------------------------------------------
-----
> > Bob Lang Room N42-140Q | This space for rent.
> > Consultant MIT Computer Services |
> > Voice: (617)253-7438 FAX: (617)258-9535 |
>
> --------------------------------------------------------------------------
-----
> bob, forged are not that expensive. we supply custom built forged at
> $120 a piston plus rings. these are made to your specs or a standard
> design. since 12.5 is fairly low compression for a race engine, probably
> sticking with a flat top design is fine. ted
> --
> Ted Schumacher
> TS Imported Automotive
> 404 Basinger Rd.
> Pandora, Ohio, USA 45877
> Ph. 800/543-6648 USA/Canada FAX 419/384-3272 24 hour
> Ph. 419/384-3022 - tech./general information
> Web page http://www.tsimportedautomotive.com
> New-Used-Rebuilt-NOS-Performance British car parts.
> 200 - 300 parts cars in our British-only salvage yard.
>
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