[urq] Engine options ... 25 year old urq

[Brandon Rogers]

Not to get off topic as I have a feeling Steve wants to stick with a 10V
but the exhaust wasn't a big deal at all - had a muffler shop marry the
top of a 3B DP to the bottom of a WX DP - $150.  No prob.
 
There are other bigger problems IMO...
 
And nothing against Megasquirt AT ALL as I have no experience with them
- but I really like how much 034 Motorsport has invested in the 5
cylinder motor - in terms of R&D, parts etc etc.  
 
Brandon

-----Original Message-----
From: Ben Swann [mailto:benswann at comcast.net] 
Sent: Thursday, September 20, 2007 3:26 PM
To: urq at pacbell.net
Cc: brogers at terrix.com; urq at audifans.com; quattro at audifans.com
Subject: [urq] Engine options ... 25 year old urq



Steve, 

I'd suggest keep in mind that the exhaust setup going with a 20V is not
trivial and adds to the expense.  I know the MC (1 or 2) can make plenty
of power and torque.  The WX is a nice engine, but almost too low of
compression.   Megasuirt makes it fairly straightforward and inexpensive
to implement an EFI conversion on a 10V, and you can keep your old
exhaust setup rather than doing with the dual setup which add more cost
and effort.

 

I'll pass you my notes as soon as I get them compiled.  I recommend
going with MS1V2 or MS2 if you want to do ignition too.  I felt that I
wasn't going to do that much better job at mapping ignition out than
Audi engineers did with the MAC-14 setup.  Motronic is nice, but adds
about $800 to the cost.   The combination of MS + MAC-14 is working out
well so far and  Cody and others have had the MAC-11 setup tuned to
outrageous numbers.

Ben

[From: "Brandon Rogers" <brogers at terrix.com>

Subject: Re: [urq] Engine options ... 25 year old urq

To: "'urq'" <urq at pacbell.net>, "'urq list'" <urq at audifans.com>

Message-ID: <001801c7fb99$23b1ee60$2c01a8c0 at BCROGERS>

Content-Type: text/plain;       charset="iso-8859-1"

Well it's no secret what option I chose when it came time to make a
motor decision...

But my feeling is why go to all the work and still be stuck dealing with
finnicky CIS?  Yes MC-2 is technologically superior to the WX - higher
compression, dual knock sensors, a little more displacement, but it
still uses CIS and layout is the same.  So I think you may still be
saddled with CIS starting and warm-up stumble issues.  For me that was
90% of the reason to go with a 3B - I was tired of chasing my tail.  If
you stick with 10V think about an EFI conversion.

My .02

Brandon]

[Date: Wed, 19 Sep 2007 15:48:22 -0700

From: "urq" <urq at pacbell.net>

Subject: Re: [urq] Engine options ... 25 year old urq

To: "'urq list'" <urq at audifans.com>

Message-ID: <026a01c7fb0f$30636510$6900a8c0 at fasthp>

Content-Type: text/plain;       charset="iso-8859-1"

... well, I got a call today ... rust in the cylinders on at least 2
pots ... now I'm really glad I decided to have someone else work on the
car!  :-)

So ... I've got many possible options at this point ... but the two I'm
thinking are my most likely solutions at this point are:

1) Keep the WX - pull the pistons, have them re-ringed and the cylinder
bores cleaned up.  I already have a head ready to go for the motor, so
this is a fairly easy option ... but then I'll still have a WX and a
MAC-02 ...

2) Install an MC-2 engine - my feeling is that the 20v (3B/AAN) doesn't
bring that much more to the table, and the dual knock sensor and MAC-13
can be tweaked ... and leave MegaSquirt options in the future.  

I thought I'd toss this one out for comment ... which is the best
choice?

Is there some option I'm ignoring that would push me toward another
option?


Does anyone know about any MC-2 engines available near the San Jose, CA
area?  I have the wiring loom and the MAC-13 ... I'd need the engine and
sensors.  I'd need to mix and match urq and MC-2 parts ... one thing I'd
like to try to work in is the fuel distributor with the position sensor
on the airflow plate ... for trip computer use should I fit a digidash.


... the last variable ... I have a set of the Wiseco pistons from the GB
a while ago.  They are oversize for the WX, I don't remember whether or
not they require boring out the MC ... should I go to the effort of
reworking the new motor to incorporate the pistons?  

It would be great to hear from someone who has gone down a similar road
...

I'd like to understand what points drove you to go the way you did ... 

TIA!

Steve B

San Jos?, CA (USA)]