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Dave9n3
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« Reply #30 on: November 22, 2016, 12:30:58 PM »
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Thanks for being so helpful - it's probably frustrating as hell haha. I'm literally about to go try log it and see if I can capture it in the act haha
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Dave9n3
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« Reply #31 on: November 22, 2016, 01:24:40 PM »
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Roads were soggy but managed to catch it, logs suggest my requested engine load going up and down as well. Throttle plate angle seems to be at 100% but the boost was fluctuating with n75 showing similar trend. Can't see any CF's either and miszul not exceeded because TIV is off on this file. I have another file exactly the same but with TIV active.
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nyet
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« Reply #32 on: November 22, 2016, 02:43:08 PM »
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I don't understand what you are trying to do there... the requested boost is barely anything.
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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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Dave9n3
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« Reply #33 on: November 23, 2016, 05:34:01 AM »
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The problem doesnt seem to occur when doing a full WOT 3rd gear pull like I usually would for logging. The best way I can explain when it happens is if I accelerate up to 3000rpm off boost, then put my foot down about half way and hold it in that position - then the boost pressure seems to fluctuate fairly quickly between about 5 and 10psi. I managed to capture it in the log above  |
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nyet
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« Reply #34 on: November 23, 2016, 11:38:00 AM »
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The problem doesnt seem to occur when doing a full WOT 3rd gear pull like I usually would for logging. The best way I can explain when it happens is if I accelerate up to 3000rpm off boost, then put my foot down about half way and hold it in that position - then the boost pressure seems to fluctuate fairly quickly between about 5 and 10psi. I managed to capture it in the log above Yes, that is part throttle problems for wg that are different from stock. Does the wg have stock cracking pressure? |
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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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Dave9n3
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« Reply #35 on: November 23, 2016, 12:15:35 PM »
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Yeah wastegate is stock and cracking pressure should be stock since no one has ever adjusted the wastegate arm - weird!
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nyet
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« Reply #36 on: November 23, 2016, 12:43:57 PM »
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Does the car behave that way part throttle with stock PID?
With stock turbos/wgs you shouldn't be touching ANY PID PARAMETERS except for IMX.
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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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Dave9n3
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« Reply #37 on: November 23, 2016, 02:03:51 PM »
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Was literally just swapping the IMX axis back to stock as that was the only thing PID related i had changed. I swapped it back and no fluctuations!  stock axis is 250, 300, 330, 470, 750, 900, 980, 1100. I had changed it to 300, 330, 470, 750, 900, 980, 1100, 1300. (all of the values in the table were stock, just shifted the axis to try and allow for the extra boost I'm running over stock) Would you recommend keeping the IMX axis stock? or should I be changing only a couple of the larger axis values rather than shifting the whole thing? |
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nyet
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« Reply #38 on: November 23, 2016, 02:15:29 PM »
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Was literally just swapping the IMX axis back to stock as that was the only thing PID related i had changed. I swapped it back and no fluctuations! stock axis is 250, 300, 330, 470, 750, 900, 980, 1100. I had changed it to 300, 330, 470, 750, 900, 980, 1100, 1300. (all of the values in the table were stock, just shifted the axis to try and allow for the extra boost I'm running over stock) Would you recommend keeping the IMX axis stock? or should I be changing only a couple of the larger axis values rather than shifting the whole thing? Nothing should be done without a good reason to based on logs. |
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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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Dave9n3
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« Reply #39 on: November 23, 2016, 02:58:36 PM »
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From what I see in the logs it seems to control quite well, no massive overshoot or anything. My only gripe is that my requested boost has a large dip at around 3500RPM that you can actually feel at WOT. I was hoping to smooth that so there was a no dip as such - IMX shouldn't be what I look at changing to correct that should it? Since requested boost shows the same dip as actual. I'd be right to look at changing IMX if actual wasn't meeting requested?
In the wiki it says specified boost is calculated from requested load, and that specifically at WOT the boost profile should follow LDRXN, though it isn't following in my case and KFLDHBN isn't the limiting factor.
Is it possible that the ecu is reducing requested boost at that point because it doesn't need any more boost to reach the desired engine load at those rpm's?
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nyet
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« Reply #40 on: November 23, 2016, 04:41:01 PM »
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From what I see in the logs it seems to control quite well, no massive overshoot or anything. My only gripe is that my requested boost has a large dip at around 3500RPM that you can actually feel at WOT. I was hoping to smooth that so there was a no dip as such - IMX shouldn't be what I look at changing to correct that should it?
No. One more time: IMX has nothing to do with requested boost. Since requested boost shows the same dip as actual. I'd be right to look at changing IMX if actual wasn't meeting requested? No. Why would adjusting IMX change requested boost? In the wiki it says specified boost is calculated from requested load, and that specifically at WOT the boost profile should follow LDRXN, though it isn't following in my case and KFLDHBN isn't the limiting factor.
No. That isn't at all what the wiki says. Is it possible that the ecu is reducing requested boost at that point because it doesn't need any more boost to reach the desired engine load at those rpm's?
No. At this point you are going to have to read the req load to boost description again, from top to bottom, and understand every single step along the way. |
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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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Dave9n3
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« Reply #41 on: November 24, 2016, 03:09:39 PM »
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Sorry. The way I wrote my question/reply made it come across different to how I intended. I was looking for clarification that I was correct in thinking IMX was not the place I needed to be messing with just yet since that wont change requested boost and that IMX wouldn't change requested boost.
Re-visited IOP and IRL and logged it, seems to follow better than before. Some I adaptions higher in the revs, and small over shoot in boost that would be good to sort.
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nyet
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« Reply #42 on: November 24, 2016, 04:00:11 PM »
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That actually looks pretty good.. i'd back off requested boost more up top so the wgdc doesn't ride 95 as long though.
You want a bit of leeway or you may throw a code if you dont meet requested boost long enough even at 95 dc.
You're also out of injector at the top, so I think you need to pull back boost anyway; you have zero egt or timing safety if you should need more fuel.
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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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Dave9n3
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« Reply #43 on: November 25, 2016, 04:26:29 AM »
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Will pull it back with LDRXN later today - i think im at about 95% duty on the injectors (317cc @3 BAR) running 4bar fpr. Now I can see how close I am to maxing them I think a worthwhile upgrade would be the 380cc ones from the 1.8t 225bhp engine, that should give me some headroom. For now though I'll pull it back a tad and make sure wg Isn't maxed out for too long! I'd like to tune it to get the most out of the hardware, then the intention is to install WMI (pwm controlled). That can wait though especially as the tune isnt anywhere near finished lol  |
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prj
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« Reply #44 on: November 25, 2016, 07:52:44 AM »
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That actually looks pretty good.. i'd back off requested boost more up top so the wgdc doesn't ride 95 as long though.
DC has nothing to do with it, the boost request is fine, KFDLULS has much more leeway than that. |
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