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Tuning Alliance

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    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    I've done the same on my 3.6R and it works as intended.

     

    I also disabled all AF Learn/Correct #3 and #4 (H6, so both Bank 1 and Bank 2 tables apply) fueling contributions because my O2 sensors are no longer physically located behind the cats (making any/all fueling contributions to CL suggested by them useless).

     

    :cool:

     

    -Brian

    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    Mike, in case you're interested on trying this with your OS tunes here's how you "unlock" the "A/F Learning #1 Modify Airflow Limit (Min/Max)" tables:

     

    1. Open up your OS ROM and edit the map for the A/F Learning #1 Airflow Ranges.

    2. Subtract 4 from the address listed (use Windows' built-in calculator in "Programmer" mode, or just use an online hexadecimal calculator if you're not familiar with hexadecimal arithmetic), increase the number of elements to 5, and then add in lines in the description for the map for "Min Learning A" and "Max Learning D."

     

    That's it! Here's a before/after screenshot of what it looks like for my particular ROM ('07 spec.B A2UI000L). In my case, the A/F #1 Learning Max A/Min B range is located at address 0xC8AE0. The Min A is located 2 bytes before the Max A/Min B value (2 bytes works out to an offset of 4), so subtract 4 from the address to begin the table there (in my case, 0xC8AE0 - 0x4 = 0xC8ADC). The Max D value is located 2 bytes after the Max C/Min D value, so you can just extend the table to look at 5 elements instead of 3, and they'll all appear in one table.

     

    I imagine this should be an identical procedure for all 32-bit Subaru ECUs that use the same closed-loop learning logic. All it is in memory is 10 consecutive bytes (2-bytes per entry in the table), which should be pretty easy to find assuming the ECUs stock map uses the same ranges (1.6g/s min, 5.6, 10.0, 40.0, 80.0 max) by just searching for the bytes "3F CC CC CC 40 B3 33 33 41 20 00 00 42 20 00 00 42 A0 00 00" in a hex editor.

     

    I'll have him take a look at it.

     

    -Brian

    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    That's in all the OS maps as well. The AF #1 is trivial to change, the AF #3 takes a little more work to get to:

     

    http://www.romraider.com/forum/viewtopic.php?p=102162#p102162

     

    http://www.romraider.com/forum/viewtopic.php?f=40&t=8131

     

    You're correct about the idle airflow throttle target not being commonly defined, however.

     

     

    I'm not really in love with that method of limiting the a/f learning, as you loose a break point the in the table, but I suppose it'll work.

    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    That's in all the OS maps as well. The AF #1 is trivial to change, the AF #3 takes a little more work to get to:

     

    http://www.romraider.com/forum/viewtopic.php?p=102162#p102162

     

    http://www.romraider.com/forum/viewtopic.php?f=40&t=8131

     

    You're correct about the idle airflow throttle target not being commonly defined, however.

     

    What about disabling CEL's, I noticed in a 03 wrx i was doing the other day, i was still getting pending codes. They won't throw the actual cel, but is there a way to shut them off in OS?

    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    I have read this in a few different posts now and had to chime in due to being contacted by previous customers with questions and opinions. I am a true Cobb accessport advocate/Certified Cobb protuner and prefer using ATP in our shop any day over opensource due to many reasons including realtime tuning *which does not play into etuning unfortunately.*

     

    That being said I would be interested if you might be able to explain to your customers what major influential tables are missing in the 05-09 LGT ECU that would make an opensource calibration incomplete or a "lesser" calibration since it seems that's what you are promoting. Please correct me if I'm wrong and just making sure everyone is on the same page.

     

    Thanks

     

    Dave

     

     

    Sure I can go into detail about which tables are missing and why they are extremely important. It is also possible that I don't have the best definitions available for OS, but tracking them down can be a challenge in itself. So forgive me if that is the case, but based on what I have here are my findings. There are benefits on the logging side, as btssm has done some great work and can support custom sensor inputs, being able to log a wideband real-time in the same log is a beautiful thing.

     

    A/F Learning #1 maf airflow limit - This table limits the a/f learning below a specified g/s. If you set CL delays to 0 and the car is fueling lets say 11:1 afr at 100 g/s, the ecu will learn a negative value over time and begin to lean out the high end. This can be very dangerous if learning values are not monitored closely over time.

     

    A/F correction #3 limits - This allows the ecu to make fuel adjustments off of the rear o2 signal for "improved" emissions. This can also sneak up a week after the tune and begin to alter the fueling throughout the entire range. Even with a disconnected rear sensor it is advisable to disable this ability of the ecu as an variance in voltage will potentially alter fueling.

     

    Target throttle angles (idle airflow target) - Some engines require increased throttle opening to return to idle smoothly. They often will dip down to 300-500 rpms when you let of the throttle, then come back to target idle speed. They will often learn to give additional angle over time, but some cars will even stall due to this. It generally is only a problem on big rotated builds with after market intake manifolds.

     

    There are also other less important tables, for example waste gate duty compensation for coolant temp. I may add some more info later, just need to do a few other things at the moment.

     

    ~Mike

    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    Another satisfied customer here! My vf40 needed to be replaced and I found a good deal on a vf52 so I went ahead and went from stage 1 to stage 3 over the 4th of July weekend. The car feels so much smoother and the power is awesome, even on stock fueling. I also averaged 25.6 mpg on my way home from Cincy that weekend. The TA team is awesome and very fast getting your maps to you!

     

     

    Thanks!!! Woot :cool:

     

    Which variant of the 16g do you have?

     

    I got tuned a little while back on the evoIII 16g and I feel like the tune left a bit on the table..

     

    Time for a TA tune, shoot us a message to get started ;)

     

    -Brian

    Nameless Downpipe: Official 5th Gen GT Install Thread

    in Fifth Generation Legacy (2010 - 2014 )

    Posted

    Hey guys, I have tuned a few of these recently and have seen varying results. I was asked by some customers to comment and thought this may be helpful to others. I haven't had much up and close time with a VF54 personally, but its seems the wastegate sizing is a bit too small for the system.I would speculate that variation in the turbine castings is causing some to flow better than others and ultimately work okay while others consistently creep. I have seen the same issue in 15-16 STi's, when a high flowing downpipe is installed severe boost spikes occur (23-24psi) regardless of boost control or flapper position. In extreme cases I have implemented throttle limiting to decrease airflow and boost into the engine. This is the only easy fix aside from reverting to a stock downpipe.

     

    Problem: Insufficient Wastegate flow (mechanical boost creep)

     

    Cause: High flowing downpipe

     

    Potential Fixes:

    -Wastegate and/or turbine porting (requires turbo removal)

    -External Wastegate (Not practical on 5th gen)

    -Electronic limiting of throttle

    -Restrictive/stock downpipe

     

    Other suggestions:

    -FMIC (may reduce boost and reduce charge temps for a happier engine)

     

     

    ~Mike

    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    I'm interested in getting a TA tune, stage 1, but had a question:. I'm overdue for a new set of spark plugs and haven't had the free time to get them installed yet. Should that make a difference in the tune? I haven't noticed any problems with the way the car runs but would hate to get the tune all set just to change something and potentially have to adjust it again. Your thoughts are appreciated!

     

    How many miles on the plugs? 6 months of revisions included if needed. Shoot us a PM with your email, and we'll send over a paypal invoice to get started.

     

    -Brian

    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    The honesty is much appreciated! I'm sure there's plenty of unscrupulous types who would take money and do nothing. Hopefully one day I'll move onto the turbo world again and I'll need your services!

     

    Not a problem!!

     

    We do sell parts too! So if you want anything, hit us up more than glad to help out.

     

    -Brian

    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    Is there any improvement to be had on an 06 2.5i 5mt that's stock? I've read there's not much point in upgrading intake and exhaust, or is that without a tune?

     

    Currently we do not tune 4 cylinder n/a legacys. That being said, no you wont see much of an improvement.

     

    -Brian

    Who else love's their Tuning Alliance tune ?

    in Tuning

    Posted

    Looking to get a bit more power out of your Subaru? Went stage 2 and want more? We've got your back! We offer ETUNING for all Subaru applications. The process is fairly simple, and we also offer 6 months of free revisions if needed! This is not just a pre-made map, each tune is custom tailor to your vehicle and needs! Cobb AP or Opensource no problem!! Looking to upgrade later down the road? No problem! We offer discounted rates for that too!!

     

    Stage 1-2 $200

    Stage 3+ $250

     

    Message us today to get your ride running healthy again!

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