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nyet
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« Reply #75 on: November 11, 2014, 01:16:54 PM »
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As I see, It's something like (Requested Lambda) = KFLBTS + (KFFDLBTS * Another map that I don't remember), so zero KFFDLBTS makes lambda tarjet following exactly KFLBTS ?
Yep. You don't have to zero all of it, just zero the parts you need to.. obviously zeroing all of it is easier. Sould I zero/one that maps? Or is better to leave them as they are? The PID correction ones, I mean. Well, maybe It's already explained in your link, probably a reply is not needed  Hmm not sure you what you mean... BTS is unrelated to the PID ... |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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dgpb
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« Reply #76 on: November 11, 2014, 01:30:01 PM »
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The more I search, the more questions come to my mind... Does MLMAX limitates Maximum airflow? Or it only throws a dtc when exceeded?
Its s4wiki description is maximum airflow but I don't know if it does anything...
I can't find the map on 032hs/hj.kp file and finding it comparing with 032hn.kp seems impossible because I don't know the value of it and, as it's a single value can't find any close shape map
Anyway, on 032hn this maximum is 550kg/h = 152.7777777... g/s. So in 032hj is the same or less. It's suspicious that, the n75 does strange things once exceeded this values of MAF
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« Last Edit: November 11, 2014, 02:28:27 PM by diegogpb »
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dgpb
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« Reply #77 on: November 12, 2014, 12:02:23 PM »
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Well, I think I got it. KFLDIMX was al alright... 0.95 on WOT at this revs. I live at sea level So I kept searching and found the correction algorythms for It on s4wiki. There's one map called KFLDLR that corrects KFLDIMX. Post-PID waste-gate duty correction table. The result of the PID is the input to this map. The actual DC is the output of this map. So looked at the .kp, compared it with my logs and found this:  Is Modifying KFLDLR the correct way to solve that high revs boost defect? In other words, to make the n75 work as logyc says (closed wastegate on WOT at high revs)? Not expecting to gain .2bar anyway, but I think that was a bad run (Edit, yes, It was a bad run, I read more g/s than that) |
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« Last Edit: November 12, 2014, 01:21:34 PM by diegogpb »
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nyet
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« Reply #78 on: November 12, 2014, 12:31:23 PM »
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The purpose of LDLR is to linearize the wastegate response, that is to say, for a given PID result, the resulting wg behavior is compensated such that the result is the same across all RPMs.
So if you need increasing WGDC to hold a certain boost level as RPM rises, LDRL should rise accordingly
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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dgpb
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« Reply #79 on: November 12, 2014, 12:39:04 PM »
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The purpose of LDLR is to linearize the wastegate response, that is to say, for a given PID result, the resulting wg behavior is compensated such that the result is the same across all RPMs.
So if you need increasing WGDC to hold a certain boost level as RPM rises, LDRL should rise accordingly
As it does not, is it a good Idea to put "95" in that last cell of KFLDLR? |
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dgpb
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« Reply #80 on: November 13, 2014, 02:08:01 PM »
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Any oppinions?
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nyet
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« Reply #81 on: November 13, 2014, 02:10:11 PM »
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As it does not, is it a good Idea to put "95" in that last cell of KFLDLR?
I'm pretty sure that means you still don't understand LDRL  I'm not sure how to explain it to you if you're already at 95, you can't go any higher. 95 is the absolute max. Period. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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ddillenger
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« Reply #82 on: November 13, 2014, 02:23:58 PM »
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I'm pretty sure that means you still don't understand LDRL I'm not sure how to explain it to you if you're already at 95, you can't go any higher. 95 is the absolute max. Period. Unless you bump TVLDMX  |
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
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nyet
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« Reply #83 on: November 13, 2014, 02:26:56 PM »
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Unless you bump TVLDMX Set your solenoid to 11 and watch it melt down. Great idea! |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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dgpb
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« Reply #84 on: November 13, 2014, 03:43:08 PM »
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I'm pretty sure that means you still don't understand LDRL I'm not sure how to explain it to you if you're already at 95, you can't go any higher. 95 is the absolute max. Period. The problem is that I'm not at 95%. Logs show around 80% of DC and a noticiable boost defect I think I understand KFLDLR. Its a correction, a linearization... whatever for the duty cycle for n75. Clearly, it does not do it very well. I'm I wrong? The last thing I want is messing you up mates, but what I'm explaining is what I understand... |
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« Last Edit: November 13, 2014, 03:50:22 PM by diegogpb »
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nyet
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« Reply #85 on: November 13, 2014, 03:50:35 PM »
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Pointless to guess until you get a proper log anyway.. You should not be modifing ANY part of the PID w/o logs of all the associated variables..
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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dgpb
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« Reply #86 on: November 13, 2014, 03:57:23 PM »
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Pointless to guess until you get a proper log anyway.. You should not be modifing ANY part of the PID w/o logs of all the associated variables..
I do agree. So, In your oppinion what things should I log? (Of course, I'll use me7logger) |
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dgpb
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« Reply #87 on: January 09, 2015, 04:24:41 PM »
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Well, I flashed this last revision 2 weeks ago and last week made a few logs. Everything's OK, no timing retardation (Literally, 0), maximum maf of 164.58g/s... And, the most important, 95% of n75 DC at redline (Seems like my modification of the last cell from KFLDLR worked well) and requested boost matching actual nearly perfect. Even at 5000rpm wgdc is kind of 80% and req and actual boost matches, which tells that the car can pull harder if I request more. It's because the cold weather imo, and the /0.8 rule gives me 206bhp, I'm quite happy of how the engine behaves and pulls... So I'm not gonna request more power at any rev range. I don't attach the logs because are from VCDS... again . I couldn´t make me7logger work, I think I made everything ok, selected the image from my ecu, selected things to log... But there's one good thing about it. In the process of learning about me7logger I realized what nyet was triyng to tell me, and variables important to log about the PID, I limit... I founded a thread about it here in nefmoto and configured the log for pid for me7logger. But really, I don't know what's happening. I'm using VAG KKG chinesse blue cable, which works perfectly with NMsoftware, what's more, I flashed 5 times my car with it without any problem. |
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« Last Edit: January 09, 2015, 04:38:55 PM by diegogpb »
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dgpb
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« Reply #88 on: January 09, 2015, 04:31:04 PM »
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I take this opportunity to ask:
I know the PID controls by boost, not by load, BUT
If my req and actual boosts are so close, why are req and actual load so different? I mean different like...20 percent points of filling. Is the me7.5 calculation so really... bad?
I don't care about load readings If my actual boost matches requested but it's just curiosity.
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« Last Edit: January 09, 2015, 04:37:22 PM by diegogpb »
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nyet
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« Reply #89 on: January 09, 2015, 06:00:57 PM »
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Generally it means the MAF isn't scaled quite right.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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