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Author Topic: How to: Stock ECU Launch control on ME7  (Read 61696 times)
TijnCU
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« Reply #135 on: October 28, 2015, 02:13:44 AM »

Thanks for the reply  Cool I'm not using this version anymore but I got it working without that bit yes.
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bl33su
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« Reply #136 on: June 29, 2017, 07:27:51 PM »

so i got the launch control working... making loud bangs  Grin

but after the car sorta has a misfire.. i turn it off and turn back on, all good again..

is this due to bad spark plugs or coil pack?
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KasperH
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« Reply #137 on: June 29, 2017, 10:18:02 PM »

so i got the launch control working... making loud bangs  Grin

but after the car sorta has a misfire.. i turn it off and turn back on, all good again..

is this due to bad spark plugs or coil pack?

Loud bangs on a fuel cut limiter?
Either you are in the wrong thread or something is seriously wrong with your engine.
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Brando47
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« Reply #138 on: October 15, 2017, 09:50:17 AM »

Has anyone toyed with the idea of turning the PI controller gains under NMAXMD to zero (NMXPG, NMXPRLG, KINMXG, KINMXRLG, TNMXPR?) so that maybe there is no throttle closing on the limiter, only fuel cut? As a potentially more efficient method than turning DNMAXH down low so fuel cut just comes on overshoot and confusing the PI controller that would likely end up with some wild throttle fluctuations and not building boost ideally. I would then set DNMAXH to 0 so the limiter is equal to NMAX. Obviously all this would also apply to the NMAXOG limiter as well which is obviously less safe than having throttle cut as well as fuel cut as the factory intended, not to mention the extra stress on the valvetrain etc that fuel cut would cause over throttle cut.

Another point, this sentence in the FR under NMAXMD "If tnmxh_w expired (TNMXH) a ramp for nmax w is started. The variable nmax_w is reduced in steps of DNMAX until it reached its lower limit NMAX" implies that maybe setting DNMAX to 0 will effectively disable the timer TNMXH (or at least the implementation of the ramp down to NMAX) so that the launch control rpm can be set below cruising speeds without the detrimental risk of NMAX overriding NMAXOG after 655 seconds.

I haven't tried any of these myself yet, but I'll be sure to post any results
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zamzu
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« Reply #139 on: January 05, 2019, 10:49:52 AM »

Hi,

can someone please confirm that on stock file 1.8t 8E0909518M VNMX is already set to 1.25 km/h and TMOTNMX is also set to -48c ?
I was trying to play around with that "launch control" stuff, but it doesn't seem to work.
I'm pretty sure I've got other scalars right.

Is the VNMX on address: 11AC9?

And I haven't found CWNMAXMD yet (is it the same as CWDNMAX in 7551M), could someone please help?
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nyet
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« Reply #140 on: January 05, 2019, 02:56:54 PM »

Loud bangs on a fuel cut limiter?
Either you are in the wrong thread or something is seriously wrong with your engine.

This.
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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.
zamzu
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« Reply #141 on: January 06, 2019, 12:28:21 AM »

I don't have any bangs or stuff like that, it drives and acts like normal, but the rev limiter (set to 3800) doesn't seem to work for some reason.
Any ideas?
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zamzu
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« Reply #142 on: January 06, 2019, 07:15:46 AM »

Hi again,

can NMAXVG affect on this version of "launch control" ? . I've set it to 6400 in first two rows, so it is lower than my max rpm in NMAXOG.

Thanks Smiley
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