HNRB4LGT Posted April 23, 2012 Share Posted April 23, 2012 So I just got my legacy tuned last week and I noticed that when I try to rev the car up, there is a lag in throttle response. Heres a video [ame=http://www.youtube.com/watch?v=pKeHXg--f70]Legacy hesitation - YouTube[/ame] http://www.youtube.com/watch?v=pKeHXg--f70 http://www.youtube.com/watch?v=pKeHXg--f70 Heres my mods Blouch 20gxtr DW850cc injectors DW65c pump KS Tech Big Maf Perrin InleC FMS FMIC THANKS! For the last time, my car is not a Camry Link to comment Share on other sites More sharing options...
bmx045 Posted April 23, 2012 Share Posted April 23, 2012 yes. you will notice a sort of "delay" with throttle response when going to a fmic. get retuned with the fmic...since you'll need to up the wastegate duty cycle a little bit to hit target boost and speed up spool time. Link to comment Share on other sites More sharing options...
HNRB4LGT Posted April 23, 2012 Author Share Posted April 23, 2012 Hmm I was tuned with the FMIC. My duty cycles were set low due to me overboosting. Should I ask him for a revision? For the last time, my car is not a Camry Link to comment Share on other sites More sharing options...
bmx045 Posted April 23, 2012 Share Posted April 23, 2012 no, i didnt see that you were tuned for it already. i dont see a problem in the video... its normal to notice a delay in response from pedal pushing to revs... Link to comment Share on other sites More sharing options...
HNRB4LGT Posted April 24, 2012 Author Share Posted April 24, 2012 Ahh so its normal. Thanks alot! For the last time, my car is not a Camry Link to comment Share on other sites More sharing options...
NSFW Posted April 24, 2012 Share Posted April 24, 2012 Get a log of what you're doing, and include these parameters: throttle pedal angle throttle plate angle RPM MAF engine load (g/rev) boost AFR <-- most important I think you'll find that the AFR dips pretty rich when you stab the throttle. In the low 10s and below it costs you some power. Half the problem is that it takes time for the air flowing into the engine to show up at the MAF sensor (which is all the ECU uses) and half of the problem is that the ECU adds a bit of extra fuel when load is increasing. Tuning that out will help but it won't solve the problem completely. I think that speed-density might solve the problem completely but I haven't switched to it yet so I'm not certain. The tables that govern the extra fuel have been found in a few ROMs but not all of them yet. At some point we'll have them for all LGTs but it takes a lot of time. Link to comment Share on other sites More sharing options...
wpmarky Posted April 24, 2012 Share Posted April 24, 2012 That was how my RacerX FMIC was also, which is why i switched to TMIC. Link to comment Share on other sites More sharing options...
HNRB4LGT Posted April 25, 2012 Author Share Posted April 25, 2012 I'm going to convert to speed density For the last time, my car is not a Camry Link to comment Share on other sites More sharing options...
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