16g-95gsc
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« Reply #15 on: April 29, 2013, 04:15:00 PM »
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Interesting, so ME7 will throw positive deviations during low boost if I was flat out requesting full boost too early? I didn't realize that. Adjust KFMIRL downwards from 4k and below? Thanks for the insight regarding AFR as well. I haven't had a chance to convert it over myself to AFR so it's interesting to see just how rich it was requesting.
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nyet
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« Reply #16 on: April 29, 2013, 04:16:41 PM »
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Yea. just request peak boost a bit later. 3250-3500 should be fine. You don't have to go nuts.
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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 #17 on: April 29, 2013, 04:18:47 PM »
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Oh, also, add wastegate duty to your logs. and might want to log spool->peak boost in 6th as well... you might have to adjust KFMIRL at lower rpms.. but for obvious reasons you might want to avoid redline in 6th  |
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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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16g-95gsc
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« Reply #18 on: April 29, 2013, 04:37:20 PM »
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This is a TIP car so 6th isn't happening.
Before I blindly play with KFLDIMX, what do you suggest doing to the values:
4000=79.8
4500=82.3
5000=88.120
5500=93.72
6000=96.98
6500=97.8
All in the 1000 column. I don't know what the units are, nor what to expect with changes (do I go up or down? Hard to tell since I don't know the units).
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nyet
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« Reply #19 on: April 29, 2013, 04:43:06 PM »
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This is a TIP car so 6th isn't happening.
5th. whatever. A tall gear. btw you should do a 6sp swap, your tranny isn't going to like this tune. I don't know what the units are, nor what to expect with changes (do I go up or down? Hard to tell since I don't know the units).
Units are in %wgdc Which is why you need to log wgdc  |
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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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16g-95gsc
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« Reply #20 on: April 29, 2013, 05:41:41 PM »
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Well I adjusted a few things and took it back out. I am really overboosting, so even though I adjusted the I-limit by +5 I believe I am still way off. WGDC is logged, take a look. I dropped timing pretty heavily and knock really seems to be under control now.
Something else that I am noticing. A VERY audible loud whistle (not the turbo) at say 5k+. It doesn't happen everytime, and it is very reminiscent of a slightly leaking coupling. I'm wondering if it's possible that the overboosting is blowing open my 710N's somehow? I'm seeing spikes of 26-27psi (!!) on the boost gauge, so I need to get the boost PID under control ASAP.
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nyet
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« Reply #21 on: April 29, 2013, 05:48:22 PM »
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Bring down your I-limit. A lot Also, your wgdc should be 95% up until JUST before request meets actual. Something is going very wrong in your PID right now. |
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« Last Edit: April 29, 2013, 05:50:31 PM 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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16g-95gsc
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« Reply #22 on: April 29, 2013, 05:51:27 PM »
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Haha, see I told you that I had no reference with which to judge how to adjust it . FWIW, as I'm sure you know, depending on the way the valve is setup bleed off can happen at 100%, or at 0%. Therefore I wasn't sure how the S4 N75 valve is setup. Rough guess, how much does it need to be brought down? Also are we talking about only during spool conditions in the 1000 column? What units are the columns in? mBar deviation from target? |
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nyet
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« Reply #23 on: April 29, 2013, 05:58:40 PM »
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Rough guess, how much does it need to be brought down?
5-10% probably. Hard to tell w/o knowing what your wastegates are doing... and you are hitting peak boost VERY late for K04s (you are running k04s, right?) What units are the columns in? mBar deviation from target?
I believe it is plsolr, which is requested *gauge* boost (plsol - plgrus), i.e. requested absolute pressure - ambient pressure. Really, there is something screwy with your wgdc... how many PID changes did you already make? |
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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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16g-95gsc
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« Reply #24 on: April 29, 2013, 06:10:20 PM »
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There are two things to that comment. #1 I am a TIP car, and have a slightly higher stall torque converter installed. This tends to trick people who are used to looking at logs of manuals as the converter will slip the rpm higher during turbo spool, making it look like it's more laggy. The other possibility is that I really do have some sort of leak taking place (see my comment about a very audible noise), but I will verify that with a boost leak test asap.
Since the last log the only PID change I made was to the 1000 column of the Imax, and even then I only upped it by 5. Other changes are:
KFLDRL
KFLDRQ2
Attached is my file along with a stock L box BIN for comparison.
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AARDQ
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« Reply #25 on: April 29, 2013, 07:41:36 PM »
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Something else that I am noticing. A VERY audible loud whistle (not the turbo) at say 5k+. It doesn't happen everytime, and it is very reminiscent of a slightly leaking coupling. I'm wondering if it's possible that the overboosting is blowing open my 710N's somehow? I'm seeing spikes of 26-27psi (!!) on the boost gauge, so I need to get the boost PID under control ASAP.
I am chasing down the same type of issue, except that mine is not loud (I'm only boosting to 19-20 psig). Found a couple of small leaks, including the MAP sensor where it seals to the mounting bracket, but it persists off and on (you might check there). One possibility I thought of is a slipping accessory drive belt; sometimes it sounds like that. I'd love to know if you figure it out. |
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Mantis
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« Reply #26 on: April 30, 2013, 04:36:47 PM »
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I am chasing down the same type of issue, except that mine is not loud (I'm only boosting to 19-20 psig). Found a couple of small leaks, including the MAP sensor where it seals to the mounting bracket, but it persists off and on (you might check there). One possibility I thought of is a slipping accessory drive belt; sometimes it sounds like that. I'd love to know if you figure it out.
I would stick with chasing down small leaks, the accessory belt shouldn't be prone to slipping at high RPM, but at low RPM |
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16g-95gsc
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« Reply #27 on: April 30, 2013, 05:32:42 PM »
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Having worked with quite a few turbo'd setups I would say it is definitely boost related somehow and only shows up at 25ish psi, as though something is finally loosening up.
Nyet, care to give me some insight into your comment regarding the odd WGDC curve?
Attached is a log from tonight that is 10% reduced I-limit from 3k and up.
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nyet
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« Reply #28 on: April 30, 2013, 07:21:39 PM »
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I think i steered you wrong about requested boost. Might want to bring it up earlier... the guidance I gave you will only cause your wgdc to start to go low too soon, which will cost you spool. Move it back to hit peak rlmax at 2500 rpm.
Your wgdc should be 95% until right before peak boost... something like this...
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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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16g-95gsc
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« Reply #29 on: April 30, 2013, 07:28:43 PM »
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Funny, I think you came to the same conclusion that I did. I was looking at WGDC and noticed some slight fluctuations early on, and just changed my map at low boost to target 95% accordingly. Since we're dealing with the I term of the PID feedback, it really only needs to be adjusted DURING spool, as that is where the maximum deviation takes place.
How does everything else look?
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