Is it a TD04 or TD05 turbo? The TD04 came on the auto DSM's and is only good for about 15 psi max, the TD05 is good for around 18 psi I believe, I always ran 15 on my Talon.

They have internal wastegates with an actuating arm, there really shouldnt be any reason to adjust that though..

 

Originally posted by O 16581 72452 5
I've got an eclipse turbo sitting in my room and really don't know anything about them, but maybe i could use this on an impreza. I'd have a shop make a custom manifold and downpipe,
Yes, unless you got a WRX crossmember, headers, uppipe, and downpipe.

i'm assuming these have an internal wastegate, i really have no idea what they look like, but how are they adjusted? I'm assuming the ring with the vacuum nipples leading to an "arm" by the exhaust part has alot to do with it.
The arm-looking thing is the wastegate actuater. It works on vacuum from the intake.

Secondly, how much boost could i run on the stock fuel system with a pressure regulator? (i'm reading parts from a turbo kit list)
Not very much. The stock RS injectors are quite small. If you upgraded those to WRX size and added a fuel pump (Walbro is good)and FPR (stock WRX will work) then your fuel system would be capable of more than the turbo. More on that in a sec...

I'll also need the Map Unit? How is this attached?
Your RS is MAP based unless it's a 98 or 99. If you wanted to convert to a MAF and use a WRX ecu you could, but it would involve rewiring parts of the car. It's easier to use an Xede which is designed to run on a MAP-based RS-T.

that's all that's listed in the turbo kit and it seems to be not nearly enough, how much boost can i run with just these few items? (i excluded the obvious Intercooler and Intercooler piping) Thanks for any help.
Don't worry yet about how much you can boost. With a lot of WRX components, you can easily make WRX power, but you will be running much less boost due to the higher compression and higher displacement of the EJ25.

I noticed that about the compressor is pointing the wrong way, but i can work around that without too much problem hopefully. My plan is to get a small front mount intercooler and turn it sideways making and opening on the botoom and on the top.
Use a WRX top mount, it's going to be simpler even with teh custom intake piping you'll need.

Running PVC pipe (don't laugh too hard) to the bottom opening and then running another PVC pipe from the top opening to the thottle body. I'm assuming the exhaust manifold is on the passenger side (i've never seen under the hood of a rear-wheel drive inline piston car) If not, that's where i will be running into difficulties.
Use whatever tubing works. As for the manifold, I'm not sure where rear-drive inline engines come into play. The outlet of Impreza headers indeed on the passenger side however. This is becaise the turbo has to go there so it can clear the brake cylinder.

Now about the eclipse turbo (as promised):
The stock WRX turbo is actually a Mitsubishi TD04, but I don't know if the Eclipse version is 'clocked' properly- that refers to the relative position of the inlets to the compressor and turbine sections. It is a very small turbo on an EJ25, but you can make it work to the tune of about 250-260 crank horsepower. That would only require 4-7 pounds of boost, but it would taper off at redline.

Over the next few weeks I myself am going to be building my own frankensteined RS-T using as many WRX components as possible, including stock turbo for as long as I can stand the lack of top end in my car. I will be keeping i-club posted on my progress of course.

 

Actually, everything still applies, except that it's a good size turbo for that motor. Slightly laggier than a WRX, but with the same top end potential. And most everything works for your car too.