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Old 09-20-2012, 02:36 PM   #1
Uruchima
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Default Stage 1 Open-Source Tune Opinion '09 2.5i

Hey Nasoicers, just wanted to get some feedback.

I have a 2009 Impreza 2.5i, COSMO CAI, OBX WRX catback, perrin sway bars, EIBACH lowered springs, Hankook V12 EVOs. I do take this car a lot to autocrosses and track days.

I have the option to getting an open-source tune with a TACTRIX cable, do you think though its worth getting it?

I know it's a N/A so im not going to get a vast amount of HP out of it (unless internals are rebuilt)

And before anybody says, dump the 2.5i and buy a WRX/STi.... I'm working on it, lol gotta finish paying this one out. Then i'll buy one. lol

What are your thoughts?
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Old 09-20-2012, 03:05 PM   #2
RaceFaceXC
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A tune is always a good idea. With that intake, a tune is 100% necessary to get the fueling back in line where it can compensate if something goes wrong.

Open source tune is the only tuning option for 08+ 2.5i besides piggyback or aftermarket engine management.


Your struts will be toast within a couple thousand miles with those springs.
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Old 09-20-2012, 03:16 PM   #3
Uruchima
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Quote:
Originally Posted by RaceFaceXC View Post
A tune is always a good idea. With that intake, a tune is 100% necessary to get the fueling back in line where it can compensate if something goes wrong.

Open source tune is the only tuning option for 08+ 2.5i besides piggyback or aftermarket engine management.


Your struts will be toast within a couple thousand miles with those springs.
Thanks for the input RaceFaceXC. Any expectations in HP/torque I should be looking for? like 10HP+ or something?

And I will be upgrading struts soon...
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Old 09-21-2012, 07:28 AM   #4
NH8991
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Quote:
Originally Posted by Uruchima View Post
...... Any expectations in HP/torque I should be looking for? like 10HP+ or something?..
You may gain a little, especially (as Race said) the stock tune is certainly not optimised for your intake.
However, don't expect any major gains in HP with your current setup. If you get the tune done for a higher octane fuel that may net you a little more.
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Old 09-21-2012, 02:21 PM   #5
RaceFaceXC
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Quote:
Originally Posted by Uruchima

Thanks for the input RaceFaceXC. Any expectations in HP/torque I should be looking for? like 10HP+ or something?

And I will be upgrading struts soon...
If you get it tuned to eliminate knock on 93 octane, you will probably see zero gains maybe slight losses as far as peak up/tq goes. You may also pick up area under the curve and smooth out the mid range dip if the tuner eliminates the OL delay. Basically it will feel like the tq comes on sooner and lasts longer. Without changing the headers to EL with a quality merge collector it's very difficult to increase V.E. or advance timing. In fact, some tunes actually retard timing a bit in some areas to get rid of knock and that is all but guaranteed if you have the stock exhaust manifold.

Don't worry about the power #'s, just enjoy the broad power band and the better top end from a quality tune.
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Old 09-21-2012, 04:35 PM   #6
scoobymatt93
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I need a tune as well, especially since I'm running the Cosmo SRI, Rallisport UEL headers, and a 3" catback... I just have no idea how to go about tuning. To the OP, if you figure something out, I'd love to know how it goes!
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Old 09-21-2012, 04:36 PM   #7
Steve2.5i
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I need a tune as well lol. Maybe we should group buy?
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Old 09-21-2012, 05:05 PM   #8
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Quote:
Originally Posted by scoobymatt93
I need a tune as well, especially since I'm running the Cosmo SRI, Rallisport UEL headers, and a 3" catback... I just have no idea how to go about tuning. To the OP, if you figure something out, I'd love to know how it goes!
Get a tactrix cable or scanner than can read the ecu. Find out the ecu id #. Go to www.Romraider.com and look for it on the supported ecu list. If it's there, any open-source tuner should be able to help you out. If they say "I don't know how to tune n/a stuff" they are either a horrible tuner or just don't want to spend their time with non turbo.

You could also teach yourself and go from there. The software is free, just need the right cable
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Old 09-21-2012, 05:40 PM   #9
Uruchima
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Quote:
Originally Posted by scoobymatt93 View Post
I need a tune as well, especially since I'm running the Cosmo SRI, Rallisport UEL headers, and a 3" catback... I just have no idea how to go about tuning. To the OP, if you figure something out, I'd love to know how it goes!
Tactrix Cable, and I found the info on a very respectable and well known Subaru Tuner. I'll ask him if I can share his info and if he obliges I'll give it to you... He's doing it over the internet. read my map, email it to him. beta comes in, run it for a week, mail him another read. Final product tune.

idk about 93 octane, never have used it, but I've heard that using 89 or 91 before a tune helps control the LEAN-ness that comes from the Huge Intake.
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Old 09-21-2012, 06:24 PM   #10
Uruchima
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While Im here anyways, before I get the tune, which is next week. Thoughts on gutting the cat?
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Old 09-21-2012, 09:08 PM   #11
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Quote:
Originally Posted by RaceFaceXC View Post
Get a tactrix cable or scanner than can read the ecu. Find out the ecu id #. Go to www.Romraider.com and look for it on the supported ecu list. If it's there, any open-source tuner should be able to help you out. If they say "I don't know how to tune n/a stuff" they are either a horrible tuner or just don't want to spend their time with non turbo.

You could also teach yourself and go from there. The software is free, just need the right cable
I actually have all of the stuff, since my bro bought it for his Evo IX. I was told it was the same hardware... I'm too afraid to screw around with it myself, but when I'm home from college on break or summer, I'm gonna try that I think...
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Old 09-22-2012, 05:00 PM   #12
Uruchima
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any thoughts on gutting the cat before the tune?
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Old 09-22-2012, 06:30 PM   #13
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Quote:
Originally Posted by scoobymatt93

I actually have all of the stuff, since my bro bought it for his Evo IX. I was told it was the same hardware... I'm too afraid to screw around with it myself, but when I'm home from college on break or summer, I'm gonna try that I think...
Double check which cable he has. There are several versions, but I think any cable that works on an EVO will work on an Impreza (provided you don't need a reflash jumper, which I'm 99% sure you don't.)
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Old 09-22-2012, 07:16 PM   #14
RaceFaceXC
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Quote:
Originally Posted by Uruchima

Tactrix Cable, and I found the info on a very respectable and well known Subaru Tuner. I'll ask him if I can share his info and if he obliges I'll give it to you... He's doing it over the internet. read my map, email it to him. beta comes in, run it for a week, mail him another read. Final product tune.

idk about 93 octane, never have used it, but I've heard that using 89 or 91 before a tune helps control the LEAN-ness that comes from the Huge Intake.
I don't see how the octane number could have any impact on the fuel/air ratio.
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