Boost overshoot on load change

Pages: [1]

« previous next »

Author

Topic: Boost overshoot on load change (Read 6300 times)

dream3R

Hero Member

Karma: +18/-8
Offline

Offline

Posts: 1194

	Boost overshoot on load change « on: December 09, 2013, 12:29:56 PM »

So what's the best/easiest method to approach this?


	Logged

How to work out values from an A2L

http://nefariousmotorsports.com/forum/index.php?topic=5525.msg52371#msg52371

Starting Rev's http://nefariousmotorsports.com/forum/index.php?topic=5397.msg51169#msg51169

noobs read this before asking http://nefariousmotorsports.com/forum/index.php?topic=9014.0title=

ORGORIGINAL 05 5120 creator for Volvo
ORIGINAL Datalogger (Freeware) Author
ORGINAL finder of the 'extra' torque' limits
I don't have ME7.01 A2L I just use ID

nyet

Administrator
Hero Member

Karma: +604/-166
Offline

Offline

Posts: 12234

	Re: Boost overshoot on load change « Reply #1 on: December 09, 2013, 12:39:28 PM »

Q2, DRL


	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.

B234R

Full Member

Karma: +11/-0
Offline

Offline

Posts: 75

	Re: Boost overshoot on load change « Reply #2 on: December 09, 2013, 12:41:13 PM »

If the PID controller is sufficiently calibrated (for a stock turbo it mostly is), use KFLDIMX to get rid of boost spikes.
I've found that that map helps a lot to get rid of most of the boost spikes, on spoolup or transient load in general.

Search on nefmoto, it has been discussed before and explained what to do.


	Logged

dream3R

Hero Member

Karma: +18/-8
Offline

Offline

Posts: 1194

	Re: Boost overshoot on load change « Reply #3 on: December 09, 2013, 12:44:02 PM »

Thanks, I've just been reviewing my tune files.

v7 didn't overshoot at all but V12 does, I'll have to go back and try v7 again, but I wonder if it's adaptations somehow?

I actually lowered the boost profile from v7 to allow for for max output my car would give, based on the logs. The only other changes are some kfzw, KFMDBGRG, and NLLMG changes, the rest is the same.

WTF?


	Logged

How to work out values from an A2L

dream3R

Hero Member

Karma: +18/-8
Offline

Offline

Posts: 1194

	Re: Boost overshoot on load change « Reply #4 on: December 09, 2013, 12:48:15 PM »

Yeah so silly me, I guess I'm running too much dc at my current boost level...

Thanks guys, log'a'tron and dmx tuning it is.


	Logged

How to work out values from an A2L

nyet

Administrator
Hero Member

Karma: +604/-166
Offline

Offline

Posts: 12234

	Re: Boost overshoot on load change « Reply #5 on: December 09, 2013, 12:51:54 PM »

dmx tuning may also require some dmx adaptation tuning as well, especially if you have a turbo that behaves very differently from stock... the rpm ranges in particular..


	Logged

dream3R

Hero Member

Karma: +18/-8
Offline

Offline

Posts: 1194

	Re: Boost overshoot on load change « Reply #6 on: December 09, 2013, 12:53:32 PM »

dmx adaptation?

Stock turbo just 45% more boost!


	Logged

How to work out values from an A2L

B234R

Full Member

Karma: +11/-0
Offline

Offline

Posts: 75

	Re: Boost overshoot on load change « Reply #7 on: December 09, 2013, 01:05:44 PM »

Don't forget that KFLDIMX map needs to be correctly set for other boost values than max boost as well.
Adaption values will be much better if that map is set correctly in most of it's areas.


	Logged

dream3R

Hero Member

Karma: +18/-8
Offline

Offline

Posts: 1194

	Re: Boost overshoot on load change « Reply #8 on: December 09, 2013, 01:20:22 PM »

Quote from: B234R on December 09, 2013, 01:05:44 PM

Don't forget that KFLDIMX map needs to be correctly set for other boost values than max boost as well.
Adaption values will be much better if that map is set correctly in most of it's areas.

Yeah I spent a lot of time using it to get desired inline with actual already, never thought reducing boost would put it out of wack though, only like 3-5% change in a few columns...


	Logged

How to work out values from an A2L

Pages: [1]

« previous next »

Jump to:

Navigation

Personal Tools

May 06, 2024, 09:20:54 PM

Welcome, Guest. Please login or register.
Did you miss your activation email?