Good price on the whole package, but really the stock WRX turbo is too small for an EJ25. The up and down pipes will also require WRX headers and crossmember.

 

I have a turbo manifold for sale if anyone would need it to help complete this kit.

 

Please define "very good power." I know you are just trying to sell your goods which is all fine and good, but the fact remains there are things people need to know before expecting to make WRX power with WRX parts on an RS-T.

The higher compression is part of the reason it is even more important to properly size the turbo. Far more air is coming and going through an EJ25T at given boost and RPM than in an EJ20t. When you lower the efficiency of the compressor, which is the effect of the last sentence, you create more likelihood of detonation.

Saying the car is faster does not mean it is making more power. It is 250 pounds lighter, and has something like 25% shorter gearing. An RS-T will smoke anything you're likely to come across under 50 miles an hour, but even a stock WRX will walk away on the freeway.

That is all besides the point. The components you are selling are well designed and can certainly be used for a turbo kit. however, I would personally only recommend them for use on 1.8 and 2.2 liter engines due to the small size of the stock turbo.

There are other issues regarding building an EJ25t out of WRX parts. Primarily, the fact you need WRX headers, the turbo Impreza crossmember, and a new cat and/or midpipe along with the uppipe and downpipes. The alternative is to keep the RS headers and get an RS-T uppipe from someplace like Ludespeed.

Tobesscooby, you will also need an intercooler, BOV, fuel pressure regulator, fuel pump (not absolutely necessary, but wise) and assorted other little bits and pieces you won't know about until you have the other things in. There is a complete parts list on www.i-speedusa.com if you care to see it.

Once again, the only real factor that makes WRX parts a bad choice for an RS-T project is the size of the turbo. Yes, you can bolt it all together, and yes it will run, but the reliability decreases as power increases.

 

Alright, please do that. Ask how much boost he is running. 3 psi? 4?

 

Yes it is. You have many choices of EJ25 kits, which should work with your motor. You could also buy the parts listed in this thread, which should work decently with your motor. The only caveat that I can think of is that you may need a custom uppipe, since you will have to keep your stock headers or get single port Borlas, either of which will have the collector in the same place.

 

Borlas work fine for an RS-T, but make sure you wrap them. This will both decrease your chances of getting a CEL and help your spool-up, as exhaust gasses lose velocity (and power to turn the turbine wheel) with heat loss. The Borlas are single wall stainless steel, while the stock headers are double walled and insulated, so the heat loss is a major issue.