[urq] WX to MC-2 Swap Plans

[Ben Swann]

BTW,

I would try to see if you can use the WX fuel distributor and lines.   As you’ll read in
the writup, I resorted to some convoluted configuration using Fuel distributor, lines
and injectors from 5ktq, WX airbox, and had to swap frequency valve and pressure
regulators.  I don’t even know if I was able to describe the assortment as basically you
need to screw together what works.  I think in the end, the WX unit should work fine –
just may have a little plug and play issues with the Frequency valve, but I’d fit check
the UrQ setup first – you’ll save a lot of time and effort.  Also the MC-2 lines will be
long and need to be bunched up – not a problem, just looked funny.

Or you can go Megasquirt. Not easier, but a lot more tunable in the end.

Ben

_____________________________________________
From: Ben Swann [mailto:benswann at comcast.net] 
Sent: Saturday, October 06, 2007 9:12 PM
To: urq at pacbell.net
Cc: 'Ben Swann'
Subject: [urq] WX to MC-2 Swap Plans

Steve,

I’ll have a lot more to add, but regarding the airbox issue, I had that situation when I
did the MC-1 into the CGT conversion.  In fact, I had to procure UrQ Fuel Distributor,
so you are ahead of the game.

See if you can’t find the details in this link: http://www.gtquattro.com/GTCTurbo.html

I’ll be sending you some useful wiring info. Directly.

I wouldn’t hesistate to do Megasquirt BTW, although won’t hurt to start with CIS then
convert later.

Ben

[Date: Sat, 6 Oct 2007 07:45:31 -0700
From: "urq" <urq at pacbell.net>
Subject: [urq]  WX to MC-2 Swap Plans
To: <urq at audifans.com>
Cc: ba-group at audifans.com
Message-ID: <00cb01c80827$8c37c0f0$a4a742d0$@net>
Content-Type: text/plain;	charset="iso-8859-1"

Well it looks like the project is moving ahead much more quickly than I expected!  The
engine arrived yesterday, it all looks to be clean and complete.  Now that I've seen the
engine I realize that there are a couple decisions I will need to make regarding which
parts to take from which motor.  

Well, the one thing that may delay the project is finding a flywheel for the engine as
it still has the automatic flex plate attached.  If there's anyone near San Jose who has
a MT flywheel with the correct pin for an MC-2 that I could borrow or buy I'd appreciate
hearing from you!  If there have been any sightings at any local pick-n-pulls I could
get one that way too.  Thanks!

Since I'm paying to get this done ... and since I'd kinda like to drive my car soon ...
I want to do a minimal amount of opening things up on the new engine.  The basic idea is
to drop the engine in whole but use the stock urq intercooler.  

I think I may have some problems with the airbox.  The airbox in the urq has the airflow
sensing plate toward the bumper, while the 200 10v has it facing back.  I also seem to
recall hearing that the injector lines attach to the fuel distributor differently.  I'm
hoping that I can bolt the MC-2's airflow sensor plate to the urq airbox, does anyone
know if that will be a problem?
As I'm typing I suspect that one problem may well be the fuel lines to the injectors
will not be long enough to support this configuration.  Perhaps the solution for
expediencies sake would be to use the WX airbox, fuel distributor and injectors.  I'll
appreciate any thoughts on this decision ... 

The downpipe on the new motor was cut off behind the point where the wastegate attaches.
I'm hoping to bolt the urq/WX downpipe up to the turbo and wastegate flanges from the
MC-2.  I know that in the past I've heard about interference issues in this area of the
motor ... will the WX downpipe clear the exhaust manifold on the MC?  

Even though my A/C is not working, I would like to be able to have A/C in the future.
The new engine does not have an A/C compressor, but it looks like there are mounting
points on the block.  Will the WX A/C compressor bolt up to the MC block?

There seems to be a potential issue with using the urq intercooler in plumbing the
intake to the throttle body.  I think the length of the MC's infamous Michelin Man hose
is too short to reach the urq IC, and the similar pipe on the WX is a "Y" arrangement.
Not only is there the extra hose to address, the shape of the throttle body flange on
the MC is not round, and may have a larger circumference.  Is it best to try to make the
WX pipe fit?
Can I use the MM hose or will I have to create a hybrid?  

The new engine includes the after-run coolant pump, which I'd like to fit into the urq.
I saw it mounted to the block on Al's car in the warm up regulator location (he's done
the EFI conversion) ... I know that the urq with the MB engine had the pump located this
way as well.  I think this may be one of the projects I'll work out for myself ... will
I be able to "bolt up" the stock urq coolant lines?  

Funny I left the most intricate task until last ... that being wiring up the MAC-14.
This is something that I will be doing myself, but I'm thinking it might be something I
will "patch" in now and clean up when the car's at home.  My plan is to ignore the ISV
electronics, and just find a place to get the power I need to run the engine and connect
it directly to the battery (with a fuse and switch of course!).  

I think that is it ... apologies for the rambling nature of the post ... but it was good
as it gave me a chance to think things through a bit.  I'm going out to the shop again
today to work through some of the details.  I'll appreciate hearing anything those of
you who have BTDT would care to share regarding things that I'm not considering.  

Steve B
San Jos?, CA (USA)]