'89 200T block question

[Alan Pritchard]

Id be very interested on keeping up to date on this, I looked into a similar
operation, using low comp pistons in my 90q. as I have the ng head (big
valves) and kv bottom end (supposedly oil squirted) it was a logical
decision to use this engine and turbo charge it.  There was an issue I
recall with different big end sizes between the turbo and na engines, my 90
is 2226 cc so it shares same bore and stroke of some of the turbo engines,
but the main issue was with rods, ie bearing sizes, either at the small end
or big end, there may also be an issue with rod length, I don't completely
recall. But I would still be very interested in finding out if the pistons
are compatible, if you have your 200 engine apart, would you be able to take
some piston and rod dimensions please. Ie conrod bearing sizes, and distance
between eyes. And on the pistons, the top of piston to gudgeon pin. Then
perhaps I can find some 90 engine specs.
Thanks.

Best Regards,
Alan Pritchard

Network Administrator
Mechanical Design Engineer
Seaeye Marine Ltd.
+44 (0)1329 289000

 -----Original Message-----
From: 	DePenning, Charles [EPM/MTN]
[mailto:Charles.DePenning at EmersonProcess.com] 
Sent:	26 May 2004 14:28
To:	'quattro at audifans.com'
Subject:	'89 200T block question

I recently acquired another donor patient, a late '89 200T (MC2) with a
'ventilated' block- #1 rod broke and poked a hole through the case right by
the ac compressor.  I'd like to use this as a donor vehicle to provide parts
for a '89 90q turbo swap.  The question is a matter of block
interchangeability.  Could I use the block from the 90q, hone it, drop lower
compression pistons in in place of the 10:1 pistons originally in there and
be done with it?  Or is the block for the '89 200T sufficiently different
enough that it would not work?  I figure there are the oil-squirters for
piston cooling, and maybe the bosses for the dual knock-sensors are not
there.  Any other differences (like the displacement?) that I am
inexperienced enough to not know about?  Would this be FrankenAudi?

Or, does anyone have an appropriate block that I could take off their hands
on the cheap?

TIA!

Charley DePenning

'01 XJ
'89 90q
'89 200T
'84 4kQ
'83 5kT
'73 C10
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