HELP!! Need pistons questions answered ASAP

[rocco16 at sbcglobal.net (Larry)]

The main arguments against forged are, as you said, noise when cold and
initial cost....don't know why they'd be hard on rings.....

Larry


----- Original Message ----- 
From: "David Utley" <mr.utility@highstream.net>
To: <stetson@unrealexpectations.ath.cx>; "stetson"
<tim@unrealexpectations.ath.cx>
Cc: "scirocco list" <scirocco-l@scirocco.org>
Sent: Friday, April 16, 2004 1:44 PM
Subject: Re: HELP!! Need pistons questions answered ASAP


> I may be in the minority on this, but I would stay with cast.
>
> I have seen them live under extreme boost (15psi) for long periods with no
ill
> effects.
>
> >From what I have seen/read, forged are hard on rings, as I said before...
> Apparently, this is the case because the expansion rate for the forged
piston
> is slower than cast, and therefore it causes slop in the bore when they
are
> cold?  I can't recall...  If that is true, then it would be possible that
the
> rings would go south before anything else.  Also, IIRC, cast pistons are
> slightly lighter for the same dimensions and specifications, which should
help
> in obvoius ways...
>
> Can anyone else offer some more concrete reasons to stay away from forged,
or
> then again to argue against my already convoluted thougth process?  :-)
>
>
> Cheers,
>   David Utley
> http://neubayern.net/mailman/listinfo/scirocco-l