[urq] Re: urq Digest, Vol 6, Issue 6

[Ned Ritchie]

The compression ratio of the MC will in SOME cases, NOT ALL, be too high
for the MAC 02 computer to handle.  The timing of the MAC 02 is a little
more advanced so more prone to knocking.  This especially happens when
you use higher than stock boost.

And of course the opposite will happen if you use a MC computer with the
urQ engine.

If I recall that even though the degrees before TDC for the reference
pin is different so is the location of the sensor relative to the TDC
point.  So this may be a moot point.  Check this out for yourselves.

Ned

-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On
Behalf Of n mko j nm
Sent: Tuesday, April 06, 2004 7:13 PM
To: urq at audifans.com
Subject: [urq] Re: urq Digest, Vol 6, Issue 6

>Hi Frank, 

   If you're still running a MAC02, then you probably have a similar
setup to mine, which I'm told was the quite common way to replace a
blown
urq motor with an MC back in the early to mid 90's. The PO had an MC
installed in Southern Cal,after overheating the motor and the shop
retained the MAC02 to avoid having to do the myriad wiring changes.
Going
that route demands that you reuse the stock urq flywheel and distributor
as well as the original fuel system and turbo,along with reusing the
intake and oil filter block assembly. It's not a bad trade you get the
hydraulics, higher compression,added displacement; but lose the knock
sensor and water cooled turbo. The PO sold me the car because he
purchased an 84 urq that was chipped with the stock WX. According to
him,
mine without a chip felt quite a bit faster than his 84 did, so I'm
inclined to think that even with a few full MC losses, if that's what
you
have in there you're in good shape, Drive the hell out of it. Hope this
helped you a little. Cheers.

Bill Chapman
83 Gobi, gotta love it

 
> 
> Say.. Messing around with my urq, and leaking ECU hoses, leaking 
> fuel lines,
> and  asorted 'mystery wiring' got me to thinking:
> 
> How can I tell what "mystery motor" is in my urq?
> 
> I'm thinking it's not the (original?) motor, as I think this one has
> hydraulic lifters (The lifter noise increases, when the oil level 
> gets low).
> Turbo is also water cooled.
> 
> Can't read the motor number, as the 'flat area' where the numbers 
> are is too
> heavily rusted.
> 
> My concern is that if a MC motor made it into the car, did or did 
> not the
> original flywheel get kept? 
> 
> It has the 'stock' ecu, but who knows what flywheel?
> 
> If the 'wrong' flywheel is fitted, I'm assuming that the timing will 
> be off
> by a constant offset (Equal to the offset of the 'pin'?).
> 
> That should be easily enough figured out from checking against the 
> timing
> information found in the IST or Bently Manuals, right?
> 
> Does the above make sense, or am I way out to lunch?
> 
> Regards,
> 
>  -Frank de Kat-

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