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Old 01-19-2012, 01:16 AM   #1
White_Rice
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OMGHi2U tuning an 05 legacy outback 2.5i?

A buddy of mine wants a bit more performance from his outback. I was wondering if through open source someone could tune it for him. just the basics more aggressive fuel/timing, possibly shift timing in sport mode.

Note.....Non-Turbo Automatic
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Old 01-19-2012, 02:22 PM   #2
P3Auto
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We have tuned a few of the 2.5i setups. Due to the poor 90 oct fuel we have adding more timing or leaning fuel out much yields very little. Shift timing is not a function of the ECU you would be programming with opensource. Remapping throttle plate control does help some in terms of response.

To really see gains with tuning your time would be best spent on supporting mods. Exhaust, intake, cams, water injection, etc. Nitrous is also an option, a 50 wet shot could be fun with a good tune behind it.
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Old 01-19-2012, 03:07 PM   #3
aleutdude
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Sorry for the threadjack, but what kinds of gains could be had if someone had a CAI and free-er flowing exhaust already installed?

Last edited by aleutdude; 01-19-2012 at 03:08 PM. Reason: syntax
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Old 01-19-2012, 03:10 PM   #4
06gtleg
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Pull timing dump fuel......... Lol
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Old 01-19-2012, 03:24 PM   #5
P3Auto
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By doing those mods you should have some gains automatically if the system is flowing better than stock. Its hard to say what kind of gains can be had until you try and tune with your setup. Regardless of what you do tune wise don't expect major gains like with the turbo cars just from a tune. Again your doing the right thing by improving flow and gains will just come naturally to a point even without a tune on these 2.5i applications.

I would venture to guess you could net 10-15whp with some tweaking.


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Originally Posted by aleutdude View Post
Sorry for the threadjack, but what kinds of gains could be had if someone had a CAI and free-er flowing exhaust already installed?
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Old 01-20-2012, 10:56 AM   #6
aleutdude
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Thats about what I thought for gains. I know theres only so much I can do to the car for power gains. If I want a truely fast Impreza I'll sell this one and buy one that has one of those exhaust-spinny thingies. That being said, more power is always welcome and better throttle response is nice, too. I'll probably be looking into tuning more this summer.
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Old 01-20-2012, 11:52 AM   #7
chanomatik
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+1 for better throttle response. It's what I miss most about my STI. The WRX is pretty dang close after a tune, though.
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