V12? Why not V10 twin-turbo? (fwd) (fwd)

["Barton P. Chambers" <bartonc@mailhost.infi.net>]

(a soft voice calls from the wings...)

Oh Elllliotttt...

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From: billv@macaw.retix.com (Bill Van Bibber's account)
Date: Thu, 22 Aug 1996 09:56:46 -0700
To: PorscheFans-928@ioio.com, bartonc@mailhost.infi.net
Subject: Re: V12? Why not V10 twin-turbo? (fwd)

Ola Unka Bart and all,

I couldn't resist the thread on 928 cylinder bores, so this is what the manual
sez:

"The crankcase upper section consists of an aluminum alloy, containing minute
particles of pure silicon.  To reach a useable cylinder surface, the cylinder
bores must be machines in such a manner that the silicon particles protrude
out of the aluminum."

book: Engine, page 13-25

It then goes on to tell of the procedure to reach a suitable mating surface
for the pistons by using such and such honing stone.  Pretty cool, really.
There is no mention of iron liners anywhere.

later,
bill

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