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Author Topic: Overboost + KFLDIMX  (Read 3203 times)
totti
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« Reply #15 on: August 12, 2019, 09:54:53 AM »

Ugh, sorry about that, that makes things significantly more difficult Sad

I've attached what could work. I would like to log everything but my communication bus does not like too much data or I don't know what is the real problem.
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BlackT
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« Reply #16 on: August 12, 2019, 11:47:06 PM »

Your KFMIRL and KFMIOP values are way off everything.
Can you log these vaules at the same time?
rl_w
rlmax
miszul
mrfa
mifa
misol
rlsol
and off course RPM and throttle plate angle
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totti
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« Reply #17 on: August 13, 2019, 10:32:33 AM »

Your KFMIRL and KFMIOP values are way off everything.
Can you log these vaules at the same time?
rl_w
rlmax
miszul
mrfa
mifa
misol
rlsol
and off course RPM and throttle plate angle

I've done 4 logs
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BlackT
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« Reply #18 on: August 14, 2019, 07:43:26 AM »

i don't see intervention now, only that ECU is chasing the boost
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nyet
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« Reply #19 on: August 14, 2019, 08:15:01 AM »

i am seeing rlsol drop off from rlmax, looks like slow path intervention.

need to see mrfa and mimax to be sure
« Last Edit: August 14, 2019, 08:17:52 AM by nyet » Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please 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 experience.
BlackT
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« Reply #20 on: August 14, 2019, 08:33:43 AM »

Good point,
At 6000 RPM and 90% load request He got low values in KFMIRL map

Need to get little higher values in this region,and in this whole row(bigger than LDRXN)
« Last Edit: August 14, 2019, 08:38:06 AM by BlackT » Logged
totti
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« Reply #21 on: August 14, 2019, 12:13:48 PM »

i don't see intervention now, only that ECU is chasing the boost
Yes currently I've the overboost. Yeah my turbo is not so fast/strong in lower rpm. What can I do with overboost problem? If I change the kfldimx I will get the intervention.
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totti
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« Reply #22 on: August 14, 2019, 12:21:54 PM »

Good point,
At 6000 RPM and 90% load request He got low values in KFMIRL map

Need to get little higher values in this region,and in this whole row(bigger than LDRXN)

Is this a problem? I'm asking because the requested boost pressure is good at 6000 rpm. I don't need more.
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BlackT
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« Reply #23 on: August 14, 2019, 01:14:22 PM »

Yes currently I've the overboost. Yeah my turbo is not so fast/strong in lower rpm. What can I do with overboost problem? If I change the kfldimx I will get the intervention.
Change IMX then do logs please, I want to see how that IMX have influence on intervation

Yes you get enought boost, but that is bad tuned KFMIRL/KFMIOP that is not the best solution. You can expeeience problems in some condition
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nyet
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« Reply #24 on: August 14, 2019, 01:15:19 PM »

Is this a problem? I'm asking because the requested boost pressure is good at 6000 rpm. I don't need more.

It isn't a problem as long as the requested boost doesn't drop off a cliff or do a crazy dance. It needs to be nice and easy, no big changes.
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please 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 experience.
totti
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« Reply #25 on: August 14, 2019, 02:56:24 PM »

Change IMX then do logs please, I want to see how that IMX have influence on intervation

Yes you get enought boost, but that is bad tuned KFMIRL/KFMIOP that is not the best solution. You can expeeience problems in some condition

Currently I have this log. The strange thing is the lamda value for me when I checked the log.
http://nefariousmotorsports.com/forum/index.php?topic=16562.msg128041#msg128041
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totti
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« Reply #26 on: August 14, 2019, 02:59:36 PM »

It isn't a problem as long as the requested boost doesn't drop off a cliff or do a crazy dance. It needs to be nice and easy, no big changes.

Ok, so rlmax should follow the rlsol?
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BlackT
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« Reply #27 on: August 14, 2019, 03:09:42 PM »

Currently I have this log. The strange thing is the lamda value for me when I checked the log.
http://nefariousmotorsports.com/forum/index.php?topic=16562.msg128041#msg128041
i don't have these variables to confirm, but everething point that there is intervetion. But without these variables
rl_w
rlmax
miszul
mrfa
mifa
misol
rlsol

I can't tell you what change in maps need to be done
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totti
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« Reply #28 on: August 14, 2019, 03:15:58 PM »

i don't have these variables to confirm, but everething point that there is intervetion. But without these variables
rl_w
rlmax
miszul
mrfa
mifa
misol
rlsol

I can't tell you what change in maps need to be done

Ok I'll do the modification maybe tomorrow afternoon and run a test. I will change only KFLDIMX. Do you have a proposal where should I change it to prevent the overboost and what should be the values? I've uploaded the current KFLDIMX table

Thanks for the help you a nyet too.
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BlackT
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« Reply #29 on: August 14, 2019, 03:27:42 PM »

Currently I have this log. The strange thing is the lamda value for me when I checked the log.
http://nefariousmotorsports.com/forum/index.php?topic=16562.msg128041#msg128041
Use values of IMX from this file i dont see here overboosting
But what i see is bad tuned KFMIRL

Your LDRXN at 5250 RPM is 175 % load
--> 175% load and 5250 RPM tru KFMIOP in your map is about 90% tourqe request
--> 90% tourqe at 5200 RPM tru KFMIRL in your map is around 160-165%

Soo at first you are requesting 175% load, but tru tourqe maps ecu calculated to request 165% load. And there all shit start to hapen, it has nothing to do with your IMX


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