Thunder240 Posted December 21, 2011 Share Posted December 21, 2011 When i bought my car, my dealer told me that the 2.5i was "designed to use 87 octane fuel", which I translated to mean has retarded engine timing. Obviously there are fewer controls to tinker with for a NA than for a turbo, but I'd think there is still a little room for improvement over the factory EMS settings. I saw a Jet Performance ECU chip at an online store which listed the Legacy 2.5i as compatible. Anyone had experience with this or any other ECU chips (or power programmers for that matter)? How much extra torque/hp were you able to squeeze out? Were there any unintended side effects? Please share! Link to comment Share on other sites More sharing options...
thestratomaster Posted December 24, 2011 Share Posted December 24, 2011 all of those chips are BS. If you want to spend the money, get an open source tune from a reputable tuner. It won't yield any power gains really but it'll make the power you have more useable and get rid of DBW lag. Link to comment Share on other sites More sharing options...
sulk Posted December 25, 2011 Share Posted December 25, 2011 as stratomaster said, you can get open source tuned for specific octane if you'd like. The main fixes are the removal of DBW lag, which does help a lot. Link to comment Share on other sites More sharing options...
Sioux-BRue Posted December 30, 2011 Share Posted December 30, 2011 What is "DBW Lag?" (sorry, noob Q...) Link to comment Share on other sites More sharing options...
bmx045 Posted December 30, 2011 Share Posted December 30, 2011 time between pressing the pedal and receiving acceleration Link to comment Share on other sites More sharing options...
saffarco Posted December 31, 2011 Share Posted December 31, 2011 Volo performance chip helps a lot, similar to these: http://www.ebay.com/sch/i.html?_nkw=volo+chip&_sacat=0&_odkw=vol+chip&_osacat=0&_trksid=p3286.c0.m270.l1313 Open source tuning would be a better choice! "When i bought my car, my dealer told me that the 2.5i was "designed to use 87 octane fuel" Read the manual, I don't think so! Link to comment Share on other sites More sharing options...
thestratomaster Posted December 31, 2011 Share Posted December 31, 2011 What is "DBW Lag?" (sorry, noob Q...) DBW- drive by wire Link to comment Share on other sites More sharing options...
apexjapan Posted January 1, 2012 Share Posted January 1, 2012 Tuning for 91+ Octane will help, but don't expect a huge change. It already runs fairly lean from the factory, the most you'll end up doing is improving ignition timing where you can. The dealer is going to tell you it'll run on 87 because that's what most customers at the dealership ask about, looking to see if it'll run on the cheapest gas. The 2.5i isn't particularly happy with that idea, though. You'll see 5-10hp at max... Possibly. N/A Subaru motors do not get big power gains like turbo models. Regards, Paul Hansen http://www.avoturboworld.com http://www.facebook.com/avoturboworld Link to comment Share on other sites More sharing options...
saffarco Posted January 1, 2012 Share Posted January 1, 2012 http://forum.liberty.asn.au/viewtopic.php?f=16&t=7207&sid=14e0fc167fed17596df9020ffda8234c To have an idea on tuning NAs.. The more modes you make the more propotional gain you will get.. 5-10 hp would be for stock and nothing more.. Link to comment Share on other sites More sharing options...
uptown4784 Posted January 2, 2012 Share Posted January 2, 2012 so we can actually put regular in these cars Link to comment Share on other sites More sharing options...
Thunder240 Posted January 8, 2012 Author Share Posted January 8, 2012 Thanks for all the responses! I don't think I can justify voiding my warranty in exchange for reducing dbw lag. Maybe after it expires. I don't know much about open source tuning, but my guess is it involves using a PC to load in a set of engine parameters that either you design or that you get from somewhere public. Is this right? Can one of you guys steer me to any resources so that I can read up on it? Link to comment Share on other sites More sharing options...
saffarco Posted January 8, 2012 Share Posted January 8, 2012 Google EcuTeck.. if interested, find a tuner. Three are easy stuffs to change like the dbw but tables needs a tuner otherwise it would be too risky.. Link to comment Share on other sites More sharing options...
apexjapan Posted January 9, 2012 Share Posted January 9, 2012 If all you want is to get rid of DBW lag, keep it simple and get a DBW throttle controller. They take 10 minutes to install (if you use the obd-II port for power), and shouldn't affect your warranty. http://www.avoturboworld.com/avoshop/throttle-controller-2007-p-58.html Regards, Paul Hansen http://www.avoturboworld.com http://www.facebook.com/avoturboworld Link to comment Share on other sites More sharing options...
Thunder240 Posted January 12, 2012 Author Share Posted January 12, 2012 If all you want is to get rid of DBW lag, keep it simple and get a DBW throttle controller. They take 10 minutes to install (if you use the obd-II port for power), and shouldn't affect your warranty. http://www.avoturboworld.com/avoshop/throttle-controller-2007-p-58.html Regards, Paul Hansen http://www.avoturboworld.com http://www.facebook.com/avoturboworld Paul, do you expect to expand compatibility to include the 5th gen (2010-2012) Legacy 2.5i? Link to comment Share on other sites More sharing options...
apexjapan Posted January 12, 2012 Share Posted January 12, 2012 Um... ah - ok, I need to updated the compatibility list. Already have had it installed in a few 2010-2011 Legacies. No difference between 2.5i, GT, or 3.6r when it comes to the pedal box, so would work on all. Regards, Paul Hansen http://www.avoturboworld.com http://www.facebook.com/avoturboworld Link to comment Share on other sites More sharing options...
Toenail211 Posted August 15, 2012 Share Posted August 15, 2012 On that website for DBW throttle controller it says "Installing the DBW Controller is very easy, and can be accomplished in as little as 10 minutes. However, once the controller is installed, it will need to be programmed for your vehicle’s specific throttle mapping. Once this is done, it will remain in the Central unit’s memory even if removed from the vehicle." can all this be done from the device? And will doing this mess up my CVT workings? Im a noob just trying to figure this all out Link to comment Share on other sites More sharing options...
BAC5.2 Posted August 15, 2012 Share Posted August 15, 2012 Volo performance chip helps a lot, similar to these: http://www.ebay.com/sch/i.html?_nkw=volo+chip&_sacat=0&_odkw=vol+chip&_osacat=0&_trksid=p3286.c0.m270.l1313 Open source tuning would be a better choice! "When i bought my car, my dealer told me that the 2.5i was "designed to use 87 octane fuel" Read the manual, I don't think so! If you buy one of those chips, you are an idiot. [URL="http://legacygt.com/forums/showthread.php/proper-flip-key-interesti-159894.html"]Flip Key Development Thread[/URL] "Genius may have its limitations, but stupidity is not thus handicapped." - E. Hubbard Link to comment Share on other sites More sharing options...
Thorr Posted August 15, 2012 Share Posted August 15, 2012 I love tortilla chips! Link to comment Share on other sites More sharing options...
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