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Old 06-23-2003, 01:16 PM   #1
wrxlvr
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Default Forester XT - how do you make it fast?

Drove a manual this weekend and was underwhelmed. It was OK, but after driving my Stage 2 WRX, it felt kind of weak.

What would it take to make it better?

Body roll - I know how to fix that.

The internals are the same as the STI. Could you swap in an STI ECU, injectors, intercooler, turbo and possibly fuel pump and have a 300hp monster? If so, I'm willing to possibly go this route.
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Old 06-23-2003, 02:57 PM   #2
FastdonkeyWRX
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I'm going to start with a catless turboback exhaust. Uppipe "appears" to be catless (uppipe egt probe is gone as well), but info posted here says otherwise, so that might be another thing. Then a boost controller to see how the car reacts. Stock boost is at 10psi, so I'll probably jack it up until the car is pulling timing. (I'm guessing around 14.5). I'll try test fitting a mrt tmic i have laying in my garage. If it works, GREAT! (The stock XT tmic is so teeny weenie). This should hold me over until someone cracks the ecu and starts remaps. I'll probably swap in colder plugs too to avoid det.

the 1g dsm wasn't amazing off the lot, but it was easy to make extremely fast w/aftermarket parts. I get the feeling that the xt will be a similar story. I do worry about the tranny though since it looks like it MIGHT be the same as the ones used on the n/a foresters.
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Old 06-23-2003, 06:59 PM   #3
jimqpublic
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The local VW/Subaru dealer had a grand opening of their new Subaru showroom over the weekend. I dropped by to look at the XT and talk about the upcoming Baja Turbo.


Easy Street Motorsports was there with several 500+ HP WRX's. I asked one of their rep's if he thought a bigger intercooler would be a good upgrade to the XT. He suggested that a bigger intercooler alone might cause some lag. Instead he suggested using a stock intercooler AND turbo from a WRX, which are both bigger than the XT model. It "should" be a simple bolt on replacement with the only tricky part being trimming the hood scoop gasket where it meets the intercooler. In addition he suggested adding a boost controller to give around 13 psi.
( http://www.easystreetmotorsports.com )


The beauty of this scenario is that "take off" turbos and intercoolers are available from people who have upgraded their WRX to bigger units.


It will be interesting to hear from some broken-in XT owners on how much boost the turbo maintains. It's possible that boost will peak at 3600 rpm's then drop off as the big engine consumes more air than the little turbo can pump at the full 11 psi. If that's true then even with stock peak boost the engine should pump out more horsepower with a bigger turbo.


Jim
1996 2.2 Outback
1978 Brat (RIP)
Soon Baja Turbo
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Old 06-23-2003, 07:31 PM   #4
agent007kimball
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Quote:
Originally posted by FastA$$WRX
I do worry about the tranny though since it looks like it MIGHT be the same as the ones used on the n/a foresters.

If it is the same tranny all you XT guys better be careful. I am making under 300 hp and around 300 ft/lbs. which seems to be a goal for this new forester XT and second gear finally gave out on me from all the torque. A new tranny is on the way, but driving without using second gear is an "interesting" adjustment in the meantime
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Old 06-23-2003, 08:12 PM   #5
Peaty
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Quote:
AND turbo from a WRX
I read that it was the WRX turbo in the Forester (Mitsu?), the STi gets a larger one. Think I saw that on Cobb's site but can't be sure.
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Old 06-24-2003, 12:57 AM   #6
FastdonkeyWRX
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from the "looks" of it, it appeared to be the stock wrx tdo4l-13g turbo...of course i haven't had the opportunity to actually dig into it yet. the bpv flange is slightly different than on the wrx and the recirc hose is slightly different, so those would have to be items that people buy from wrx owners along with the ic. I think the ic support brackets are different as well, but appear to bolt into similar locations on the tranny case.
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Old 06-24-2003, 02:36 AM   #7
Kostamojen
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Well It might be reasonable to just upgrade the intercooler when you do the exhaust piping (turboback) and after the boost controler. Then you wont notice the lag as much, and an STI intercooler would probably bolt up better since the piping appears to be a little different...
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Old 06-24-2003, 11:09 AM   #8
jimqpublic
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Quote:
Originally posted by FastA$$WRX
from the "looks" of it, it appeared to be the stock wrx tdo4l-13g turbo...
I was just going by the Easy Street guy's comments on the XT turbo being smaller than the WRX. I don't know a turbo from a hair dryer.

Jim
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Old 07-01-2003, 04:52 AM   #9
subgt00
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Hey guys thought I'd chime with a bit of useless info,
I have a Aussie GT Forester EJ20T which I have now got producing 105% more power than stock 130kw atfly
Now I have a good 137kw atw. (almost 200bhp I think)

Mods that I have done which should be able to be carried over to your new XT (soon to be here as well) are
WRX turbo and intake pipe (from turbo outlet to i/c - especially the STi)
Check with some expert to what boost the oem bov will hold, as my model bov leaked at 11psi change the bov and add a mbc and whola you have instant power for maybe 200-300 bucks
Turbo back exhaust

All above will void your warranty though!!
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