Re: [alfa] mixing piston types

["Frank Smith" <alfafan@xxxxxxxxxxx>]

As Jeff has said that AE and Borgo are the same, I'm not sure the balance is
that critical.....just before the Nashville convention, I lost a piston and
liner due to a broken spark plug insulator.....luckily on #1........it was
replaced w/o balance due to time constraints.....three years and a plethora
of track sessions and any imbalance cannot be felt.......but, then again,
Brian knows I am incredibly lucky......
Frank Smith
69 1750 Spider
72 GT JR
Cockeysville, MD----- Original Message -----
From: "Brian Shorey" <bshorey@domain.elided>
To: "'Bruce Giller'" <bgiller@domain.elided>; "'alfa-digest'"
<alfa-digest@domain.elided>
Sent: Thursday, March 11, 2004 3:12 PM
Subject: RE: [alfa] mixing piston types


> > My GTV needs to have one piston/liner pair replaced
> > after the oil ring fell apart and ruined both the liner
> > (great big gouges) and the piston (part of the piston between
> > the wrist pin hole and the oil ring land disappeared).  I had
> > rebuilt the engine 2 years ago and replaced all the pistons
> > and liners.  After calling around to various Alfa suppliers
> > who only sold the piston/liners in sets of 4, I found IAP
> > would sell a single set ($99).  It arrived yesterday where I
> > discovered that the piston/liner was made by AE whereas my
> > other 4 pistons were made by Borgo.
> >
> > Can I just go ahead and replace the Borgo with the AE
> > piston or should I make sure that I have a Borgo replacement piston?
>
> IMO, you're asking for trouble here, unless you take everything apart and
> have it all balanced up.
>
> Assuming it's all balanced, and the contour of the piston dome is the same
> for all four, I don't think it would make a difference, but that's just mu
> opinion, I could be wrong.
>
> But the balance is critical.  If you're just planning on swapping in the
new
> piston, I don't think you'll be happy with the results, unless you get
> incredibly lucky and the balance is perfect.
>
> bs
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