DrGeorgeTompson
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« Reply #60 on: March 27, 2014, 01:55:36 PM »
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It's wnwi_w, and that looks right to me. Nye, gotta look at the scale. All that movement is still only 1 degree.
Ok, good because That was the only cam variable i could find other than intake cam. So what should i do to control the requested boost? Should i decrease KFPBRK? Or KFURL or.... |
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DrGeorgeTompson
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« Reply #61 on: March 31, 2014, 08:43:47 PM »
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I cant seem to figure this notch out. I've tried making the last column of KFPBRK and KFPBRKNW the same (i saw it as a solution on another thread) but that didn't really help. Does anyone have a suggestion?
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ddillenger
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« Reply #62 on: March 31, 2014, 09:06:55 PM »
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KFTARX-did you change it?
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DrGeorgeTompson
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« Reply #63 on: March 31, 2014, 09:58:01 PM »
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KFTARX-did you change it?
Ah, it appears that has been changed in the gonzo tune i was using as a base. I'll try changing it back to stock. |
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ddillenger
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« Reply #64 on: March 31, 2014, 10:36:09 PM »
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It's a weighting factor for requested load. Stock is not sufficient.
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nyet
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« Reply #65 on: March 31, 2014, 10:38:22 PM »
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it will show up in req load though...
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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 #66 on: March 31, 2014, 10:40:20 PM »
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Only Some parts of it were set lower than stock. Should I adjust the affected rpm range (3-4k)?
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ddillenger
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« Reply #67 on: March 31, 2014, 11:14:03 PM »
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KFTARX-Set to 1.0
KFLDHBN-Set sufficiently high to prevent hitting the max allowable pressure ratio for the altitude you're at.
That should get requested load a bit closer to where you want it. After that, it's time to rescale KFMIOP as it's generally not sufficient in the 1.8t to run much load over stock.
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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!
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userpike
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« Reply #68 on: March 31, 2014, 11:30:02 PM »
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Ah, it appears that has been changed in the gonzo tune i was using as a base. I'll try changing it back to stock.
Ah, it appears that has been changed in the gonzo tune i was using as a base. I'll try changing it back to stock.
I see your AFR is like 14ish just after 3000 rpm during the 19 PSI boost spike. Be at like 12.5 from 2500 rpm up and taper AFR down in the rpm range where EGTs go up too high. The 1.8t engines power band is between 2800 and 5500 rpm with stock cams. if Gonzo changed KFTARX then it's to your benefit over stock values as he most likely allowed for more load at higher IATs and rpm. |
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DrGeorgeTompson
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« Reply #69 on: April 01, 2014, 07:04:57 AM »
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KFTARX-Set to 1.0
KFLDHBN-Set sufficiently high to prevent hitting the max allowable pressure ratio for the altitude you're at.
That should get requested load a bit closer to where you want it. After that, it's time to rescale KFMIOP as it's generally not sufficient in the 1.8t to run much load over stock.
I did this. Generally, the requested boost was lowered. The notch was still as present as it's ever been. I can post a log when I get to my laptop. I'm pretty content with how my actual boost performs before I changed KFTARX to 1.0. It doesnt seem to be affected heavily by the notch unless the actual is crossing set point in that range. I was thinking that it might be KFMIOP but I am fairly unfamiliar with that table. I'll have to research.
I see your AFR is like 14ish just after 3000 rpm during the 19 PSI boost spike. Be at like 12.5 from 2500 rpm up and taper AFR down in the rpm range where EGTs go up too high. The 1.8t engines power band is between 2800 and 5500 rpm with stock cams.
Thanks for that. Thats an old log, I don't have that much overshoot anymore but I'll be sure to keep an eye on that. I haven't messed with fueling yet as I'm trying to get boost under control first. |
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userpike
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« Reply #70 on: April 03, 2014, 03:11:25 PM »
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I did this. Generally, the requested boost was lowered. The notch was still as present as it's ever been. I can post a log when I get to my laptop. I'm pretty content with how my actual boost performs before I changed KFTARX to 1.0. It doesnt seem to be affected heavily by the notch unless the actual is crossing set point in that range. I was thinking that it might be KFMIOP but I am fairly unfamiliar with that table. I'll have to research.
Thanks for that. Thats an old log, I don't have that much overshoot anymore but I'll be sure to keep an eye on that. I haven't messed with fueling yet as I'm trying to get boost under control first.
Could be the stock timing that is giving you the "notch"? your boost stays pretty consistent, fueling is ok.. load, maybe you'll have to add some timing in the rpm range between 3000 and 4500 rpm? I would get your fueling on point before anything else though. maybe someone else will look into your log/s. If you have a new one post it up. |
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DrGeorgeTompson
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« Reply #71 on: April 03, 2014, 04:01:35 PM »
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He're's a recent log. I kinda cheated and adjusted ldrxn to remove the notch (i know it's probably not the right way to do it).
Fueling I want to fix, but I'm not sure where to start (lamfa?). I don't have a wideband o2 sensor, so i don't know if my lambda readings are accurate. It seems like it's running WAY too rich most of the time (high egt protection?). I checked block 032 on vcds and the ltft was only at 1.6% enrichment after some fairly heavy driving, which seems good to me. What variable should I log for EGT?
At this point I have a pretty good understanding about tuning the boost but with fueling i'm a little lost. I need a gentle nudge in the right direction.
I've attached my latest tune revision
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nyet
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« Reply #72 on: April 03, 2014, 04:11:31 PM »
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I don't have a wideband o2 sensor Full stop. Fix this first. Go no further. |
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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 #73 on: April 03, 2014, 04:56:43 PM »
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Full stop. Fix this first. Go no further.
This was my thought. That's why I haven't been touching any fueling stuff, i've read plenty of stuff on the forum about how accurate narrowband is. I'll pick up a wideband some time soon. I mean it drives really well otherwise, at least on my car. |
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userpike
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« Reply #74 on: April 03, 2014, 05:35:56 PM »
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I don't have a wideband o2 sensor, so i don't know if my lambda readings are accurate.
I checked block 032 on vcds and the ltft was only at 1.6% enrichment after some fairly heavy driving, which seems good to me.
What variable should I log for EGT?
I need a gentle nudge in the right direction.
Yes you do have a WB 02 sensor, in the B1S1 position if it is an AWP motor with stock ECU. Don't worry about block 32 at this point, you are running stock fueling so only use it at this point to look for boost and vacuum leaks. As long as those numbers are less than 5%+- you are in the good. closer to 0 is ideal but both or 1 being 0 is a problem and never should be like that. There will always be some sort of correction. the 1.6 you have is about perfect for both numbers in block 32. AFAIK Block 33, 1st number is what you will want to be watching because it is like real time correction via the o2 sensor. as far as the variable to log for EGT, I'm not sure what to log in VCDS, I know there is a calculated catalytic converter temp in one of the blocks but I am forgetting right now which. I imagine this will be what you want to log as one of the primary goals of the ECU is to keep the catalytic converter "happy". (unless that has been coded out along with the 2nd O2 sensor) As far as the gentle nudge, hit up the S4 wiki on fueling, really on everything, it is very accurate as Nyet spent much time preparing it. |
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