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Old 09-21-2004, 02:05 PM   #1
Kc2Buk
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Default Baja Turbo size and psi INFO Please

I have a 2005 Subaru Baja Turbo equipped with a standard
2.5-liter, H4, 210-horsepower / 235 lbs of torque, turbo engine.

Now the 2.5L H4 turbo in an STi has 300 hp / 300 lbs of torque
Is the power differance just a matter of Tuning and Boost, Cams, Turbo size, or all?
The guy at the dealership said The STi Turbo is bigger and runs around 14.5psi with and bigger intake and exhaust.
He also said the BAJA turbo is the same as the stock WRX running around 11.6psi.
Is this INFO true?
Thanks
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Old 09-21-2004, 07:46 PM   #2
ez bturbo
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The boost numbers you listed are correct. The baja turbo actually will out-dyno a stock wrx, so it is under-rated, 230-240hp is more accurate.

Differences include the turbo, exhaust, intercooler, tuning, but I believe the internal motor is the same as the STi, although my dealership sales guy also tried telling me it had different cams and exhaust valves.
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Old 09-22-2004, 01:51 AM   #3
BajaNut
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I am not sure about the cams, but I bet they are different. The exhaust valvs are the same (sodium filled , which the FXT doesn't get). But ther than that everything ez bturbo said is what is the differance.
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Old 09-24-2004, 11:24 AM   #4
Kc2Buk
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What size turbo is in it?
How much more boost can you get out of the stock turbo safely?

This is a new ocean for me to be swimming in.
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Old 03-27-2005, 09:17 AM   #5
Kc2Buk
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Quote:
Originally Posted by Kc2Buk
What size turbo is in it?
How much more boost can you get out of the stock turbo safely?

This is a new ocean for me to be swimming in.
What is the Stock BAJA Turbo = to, Garet T-25, T-28, Mitsu 14B, 16G?
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Old 03-28-2005, 12:25 PM   #6
wikidwrx
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It's a Mitsubishi TD-04L just like on WRX's. That's confirmed since I've pulled my turbo and replaced it with a VF-39.
Search under my name. I've posted info along with pics and sound clips.

wikid
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Old 03-31-2005, 11:18 AM   #7
Kc2Buk
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Quote:
Originally Posted by wikidwrx
It's a Mitsubishi TD-04L just like on WRX's. That's confirmed since I've pulled my turbo and replaced it with a VF-39.
Search under my name. I've posted info along with pics and sound clips.

wikid
Nice Pictures!
Mitsubishi TD-04L = Small
Are you happy with the VF-39 and STi TMIC swap or do you still want more power?
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Old 03-31-2005, 04:04 PM   #8
wikidwrx
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Quote:
Originally Posted by Kc2Buk
Nice Pictures!
Mitsubishi TD-04L = Small
Are you happy with the VF-39 and STi TMIC swap or do you still want more power?
Still need a dyno tune for the VF-39. At the moment, its all good but as far as using the VF-39 straight up with no tuning, the ecu goes into limp mode
not going ever 10 PSI. It makes sense since now, the turbo forces in more boost that the ECU detects and protects the engine.
I'm scheduled for ECUtek re-flash this saturday so we'll see.
I think this is enough for what I need. We're guessing the HP in the neighborhood of 250+, not sure about torque.

wikid
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Old 04-02-2005, 09:13 PM   #9
Kc2Buk
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Cool! Good luck.
Keep us posted,
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Old 04-02-2005, 11:26 PM   #10
BajaGreg
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KcBuk, I disabled the safeties on my Baja turbo for a test only and found I could get around 21 psi out of the stock turbo. I only run 14.5 psi though cause the pump gas will cause the knock sensor to trigger at anythine over about 14-15 psi. Hope that helps, Greg...
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Old 04-03-2005, 12:33 AM   #11
Kc2Buk
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Quote:
Originally Posted by BajaGreg
KcBuk, I disabled the safeties on my Baja turbo for a test only and found I could get around 21 psi out of the stock turbo. I only run 14.5 psi though cause the pump gas will cause the knock sensor to trigger at anythine over about 14-15 psi. Hope that helps, Greg...
WOW! 21psi.

I sill don't know what I want to do.
I like the ALL WHEEL DRIVE cars.
Been thinking about building up a WRX STi, or Evo MR.
The insurance on the rally style cars is so Freaking High here in NJ.
Wikidwrx and his BAJA Sti conversion is a kick azz idea.
It makes an awesome sleeper.
Then my mother in-law gets a 2005 Subaru Legacy 2.5 Turbo GT Limited
and after driving that, I'm like WOW! This would build up into a nice sleeper.
If Subaru made a Legacy GT or BAJA 2dr CONVERTIBLE that would be perfect.
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Old 04-03-2005, 12:54 AM   #12
wikidwrx
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Quote:
Originally Posted by Kc2Buk
WOW! 21psi.

I sill don't know what I want to do.
I like the ALL WHEEL DRIVE cars.
Been thinking about building up a WRX STi, or Evo MR.
The insurance on the rally style cars is so Freaking High here in NJ.
Wikidwrx and his BAJA Sti conversion is a kick azz idea.
It makes an awesome sleeper.
Then my mother in-law gets a 2005 Subaru Legacy 2.5 Turbo GT Limited
and after driving that, I'm like WOW! This would build up into a nice sleeper.
If Subaru made a Legacy GT or BAJA 2dr CONVERTIBLE that would be perfect.
Got my Reflash today check out my post.

wikid
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Old 04-03-2005, 04:57 PM   #13
Kc2Buk
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Quote:
Originally Posted by wikidwrx
Got my Reflash today check out my post.

wikid
http://forums.nasioc.com/forums/showthread.php?t=745213
GREAT!
Really Nice All Wheel Horse Power #s.
I would say you have a BAJA STi.
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Old 04-04-2005, 08:54 AM   #14
string theorist
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Quote:
Originally Posted by Kc2Buk
WOW! 21psi.
That's a small enough turbo to lose efficiency way before that. Without crunching the numbers, I'd guess a TD-04 would be good for about 17 psi effeciently.
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Old 04-04-2005, 10:48 AM   #15
Kc2Buk
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Quote:
Originally Posted by string theorist
That's a small enough turbo to lose efficiency way before that. Without crunching the numbers, I'd guess a TD-04 would be good for about 17 psi effeciently.
Oh OK,
So its around the size of a T25.
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Old 04-05-2005, 05:24 PM   #16
BajaT05
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Quote:
Originally Posted by BajaGreg
KcBuk, I disabled the safeties on my Baja turbo for a test only and found I could get around 21 psi out of the stock turbo. I only run 14.5 psi though cause the pump gas will cause the knock sensor to trigger at anythine over about 14-15 psi. Hope that helps, Greg...
How did you do that? I would like to know....
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Old 04-06-2005, 12:07 AM   #17
BajaGreg
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Default Test Boost

BajaT05,
Hi greg here. I just got the 21 psi of boost for short bursts in 4th gear to test out the turbo. As with any turbo, it won't hold its max boost all the way through the rpm range. As I said this was only a test and in NO WAY am I reccommending that you run your baja at 21 psi. I run it at 14.5 because it is a known fairly safe boost level. If you want to run more boost I reccommend a reflash of the ECU along with other mods. My Baja has no mods other than
an MBC. I did however get good boost response in 4th and 5th gear all the way up to 16.5 psi until about 4000 rpm then it starts to drop off after that.
P.S. you don't want to remove the safeties on the turbo because if you leave them off and overboost too much you WILL BLOW the engine.
Hope that helps.
If you want to boost up the Baja I suggest you follow the path of one of the STI Baja projects on this web site. These guys are doing a good job. Greg...
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Old 04-06-2005, 07:59 AM   #18
BajaT05
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What exactly is an MBC? Ohh I was just curious about that stuff... I might not even mod it until a year or so when I start to make some money....
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Old 04-06-2005, 09:10 AM   #19
Hawk296
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Manual Boost controller
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