DrGeorgeTompson
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« on: March 12, 2014, 01:41:57 PM »
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Hey guys, So i've been lurking around here for a while and I'm trying to learn as much as can, but I could use a hand here. So the problem I'm having is mild overboost (~150 mbar) issues. I've spent a lot of time working on the "base" tune that was posted by Gonzo some time ago: http://nefariousmotorsports.com/forum/index.php?topic=1272.0When I first started messing around with gonzo's tune the boost pressure was super unstable at WOT and would surge and be generally crappy. So I changed the PID using the information posted in this thread: http://nefariousmotorsports.com/forum/index.php?topic=1449.0 NOW, the boost is super solid and the car pulls great BUT I get the overboost issue. I'll attach, my current tune version, the tune I used as a base,the stock tune for my car, and some logs. I'm still tweaking the PID to prevent the overboost but I can't seem to figure it out. If anyone could help me/point me in the right direction it would be most appreciated. Is there anything I should change since I'm running a K03 rather than a K04? |
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nyet
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« Reply #1 on: March 12, 2014, 02:47:05 PM »
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If you are running K03s, all of your PID maps should be closer to stock.
In particular, DRL
Also, when working with the PID, you should be logging:
ldimx_w, ldimxak_w, lditv_w, ldptv, ldrdtv, ldtv, ldtvm, ldtrv_w
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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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DrGeorgeTompson
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« Reply #2 on: March 12, 2014, 02:49:29 PM »
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Also, when working with the PID, you should be logging:
ldimx_w, ldimxak_w, lditv_w, ldptv, ldrdtv, ldtv, ldtvm, ldtrv_w
Ok, I can do that on my way home and post them. |
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DrGeorgeTompson
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« Reply #3 on: March 12, 2014, 02:54:18 PM »
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In particular, DRL
I set KFLDRL back to stock, I'll see if that gets me any closer to where I'm trying to be. Thanks |
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nyet
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« Reply #4 on: March 12, 2014, 03:04:41 PM »
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Keep us updated! I will try to help as best as I can.
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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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DrGeorgeTompson
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« Reply #5 on: March 12, 2014, 05:04:28 PM »
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Ok so I flashed an updated tune before I left work (Same as AWEdit2.5 except KFLDRL was reset to stock values.)
Changing KFLDRL back to stock made partial throttle pretty "chunky" and the WOT overboost issue was worse if any different. A lot of the PID tables are still totally different than stock, mind you. I could get some logs with the altered KFLDRL tomorrow if that would help.
It was hard to get a good pull without getting lots of wheel slip or hydroplaning and dying since it rained a bunch this afternoon.
Anyways, here are what logs with the PID. (both are 3rd gear pulls fwiw)
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nyet
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« Reply #6 on: March 12, 2014, 05:06:37 PM »
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Ugh. Put them all back to stock and start from scratch :/
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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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DrGeorgeTompson
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« Reply #7 on: March 12, 2014, 05:19:41 PM »
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How do I use the PID results to determine what I should change for future reference?
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nyet
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« Reply #8 on: March 12, 2014, 05:21:17 PM »
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How do I use the PID results to determine what I should change for future reference?
Good question  There is no easy answer, tuning a PID is VERY tricky business... but if your turbo and wastegate are stock, you should only have to make minor changes. I'll try to help as best as I can. |
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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 #9 on: March 12, 2014, 05:27:43 PM »
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Good question There is no easy answer, tuning a PID is VERY tricky business... but if your turbo and wastegate are stock, you should only have to make minor changes. I'll try to help as best as I can. If only someone wanted to clarify the PID section of the wiki but lacked the appropriate help to do so! |
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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
Email>PM
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nyet
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« Reply #10 on: March 12, 2014, 05:30:03 PM »
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If only someone wanted to clarify the PID section of the wiki but lacked the appropriate help to do so!
Dude. Tuning a PID is its own art... I wouldn't even know where to start considering what I do to the PID is generally hack it to shit until it does more or less what I want it to. There is literally decades of literature on the topic, most of which is beyond my understanding. |
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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 #11 on: March 12, 2014, 05:31:30 PM »
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lol
I know it. That's the problem I'd like to rectify.
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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
Email>PM
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DrGeorgeTompson
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« Reply #12 on: March 12, 2014, 05:38:14 PM »
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So in KFLDRQ0,1,2
- one axis is RPM (or so it seems)
what is the other a measurement of? Mine goes 100, 200, 400, 700
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nyet
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« Reply #13 on: March 12, 2014, 05:55:32 PM »
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So in KFLDRQ0,1,2
- one axis is RPM (or so it seems)
what is the other a measurement of? Mine goes 100, 200, 400, 700
for S4 Mbox, (actual pressure - "ground" pressure), or pressure over ambient in hPa (mBar) Not sure of your file, but i assume your "ground" pressure is also ambient. |
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« Last Edit: March 13, 2014, 09:36:13 AM by nyet »
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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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nyet
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« Reply #14 on: March 12, 2014, 05:56:32 PM »
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lol
I know it. That's the problem I'd like to rectify.
You'll probably have to find an ME and a math PhD to advise  |
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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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