Launch Control

Posts related to specific vehicles, or any other general tuning info.

Launch Control

Postby abc-tuning » Tue Jan 21, 2014 12:29 am

How to do Launch Control on Me7.5 and many other ECUs

VNMX (1157E) - The vehicle speed for activating the raised (normal) rev limit. Set this as low at it goes (1.25 km/h) so the launch control shuts off as soon as you start moving off the line.
Values: 8bit
Unit: km/h
Factor: 1,250000
Offset: 0
Presicion: 2

DNMAXH (16304) - This is the RPM above rev limit when the fuel cut comes on. Tweaking this helps make more boost on the limiter. 50 RPM is a good start.
Values: 16bit LoHi
Unit: 1/min
Factor: 0,250000
Offset: 0
Presicion: 3

ITNMXH (16308) - Dwell time under lower limit before activating the upper limit. Set to 0.
Values: 16bit LoHi
Unit: s
Factor: 0,010000
Offset: 0
Presicion: 4

NMAX (1630A) - Ends up being the launch RPM. 3000 is a good start.
Values: 16bit LoHi
Unit: 1/min
Factor: 0,250000
Offset: 0
Presicion: 3

NMAXOG (16312) - This is the raised RPM limit which becomes the standard limit. Set to your desired redline.
Values: 16bit LoHi
Unit: 1/min
Factor: 0,250000
Offset: 0
Presicion: 3

TMOTNMX (16316) - Coolant temp for activating raised (normal) rev limit. Set this at -48 so that you can rev past the low limit while car is warming up.
Values: 16bit LoHi
Unit: s
Factor: 0,010000
Offset: 0
Presicion: 4

TNMXH (1631A) - This is the time duration of the raised (normal) rev limit. Set this to its maximum value of 655.3500 seconds. In theory, this may trigger at some point, but nobody has reported such a thing yet.
Values: 8bit
Unit: degrees C
Factor: 0,750000
Offset: -48
Presicion: 2

Some ECU's need:
CWNMAXMD (8-bit) - Codeword Drehzahlbegrenzung (Codeword for RPM limiter). Change from 0 to 1

Values: 8bit
Factor: 1
Offset: 0
Presicion: 2

8D0907551M-launch_control.rar
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Re: Launch Control

Postby sparco » Tue Jan 21, 2014 2:58 am

Great info abc :thumbup:
I am not working on these ecu's, but currently trying to make launch control for my 1.6HDi ;)
Totally different approach though, first test file is ready...

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Re: Launch Control

Postby zok » Tue Jan 21, 2014 10:00 am

I just did it on my mondeo 2.0 TDCi with manual gearbox (ECU Delphi MPC555) - found the gear dependant IQ limiter, an set a column for neutral gear to 50 mg/str @ 2000 and 0 mg/str @ 2500 rpm.

RPM limit while standing still is just a bit less than 2500 rpm (because of interpolation), and as soon as 7 km/h is reached, I get into the column for 1st gear (still restricted to avoid excess wheelspin).

I had tried to set up other configurations, but so far, this one proved to be one of the best I tried on this engine. Except on the wet surface. It just keeps spinning and spinning and spinning all the way to third gear... :crazy: :D

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Re: Launch Control

Postby Grantyboy91 » Tue Jan 21, 2014 11:24 pm

This sounds pretty interesting, although as far as I know with the 1.8t 20v engines you need forged rods as you can bend them or worse with launch control ?

On another note though, has anyone tried this with the 1.9pd engines yet ? Would be a pretty funny !

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Re: Launch Control

Postby sparco » Tue Jan 21, 2014 11:32 pm

Its tried and tested... vag edc15suite has a built in function to activate LC

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Re: Launch Control

Postby sparco » Thu Jan 23, 2014 10:30 pm

here's mine, currently set at 2750rpm, still need to adjust the Torque limit to prevent wheelspin, but as the comment states, it's on shitty wheels, slipping clutch and wet surface at the moment...

http://youtu.be/jQ_Ry63UK0c

http://youtu.be/UL8at0QjMt0

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Re: Launch Control

Postby Nvm » Sun Jan 26, 2014 2:15 am

Awesome work

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Re: Launch Control

Postby punda » Wed Jan 29, 2014 2:41 pm

great info , Thanks for sharing

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Re: Launch Control

Postby Infamouspt » Thu Feb 06, 2014 8:19 pm

Really great, thanks for the info :)

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Re: Launch Control

Postby gpro » Mon Feb 10, 2014 3:28 am

thank you! very helpful

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