ME7.x - Launch Control xD

So you want to launch like the cool Subaru/Evo kids? As it turns out we can! And it's pretty easy. It works like this.. ME7 has a bulit in raised rev limit function which is unused by default. We set it up so the standard rev limit (NMAX) becomes the launch rpm and the raised limit becomes the normal limiter. It's controlled by VNMX so that as long as the car is below 1.25 km/h the launch control limit is used. Above 1.25 km/h the raised limit aka the new normal limit is used.

Here are the maps I modify including their M-Box addresses

CWNMAXMD (8-bit) Codeword Drehzahlbegrenzung Set to 1

VNMX             (1157E)     The vehicle speed for activating the raised (normal) rev limit. We 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.
DNMAXH         (16304)     This is the RPM above rev limit when the fuel cut comes on. Tweaking this helps make more boost on the limiter. I use 50 RPM  (Keep in mind the maximum RPM limit is NMAXOG + DNMAXH)      
ITNMXH          (16308)     Dwell time under lower limit before activating the upper limit. We set this to 0 seconds
NMAX             (1630A)     Ends up being the launch RPM. I've found 4500 RPM works well.
NMAXOG         (16312)     This is the raised RPM limit which becomes the standard limit. Mine is set at 7100 RPM
TMOTNMX       (16316)     Coolant temp for activating raised (normal) rev limit. We set this at -48 so that it can activate at any coolant temp.
TNMXH           (1631A)     This is the time duration of the raised (normal) rev limit. We set this at it's maximum value of 655.3500 seconds. I haven't had a problem yet with this and have been testing for months.

And here are the results! http://vimeo.com/14266421

Eventually the plan might be to make this into a self installing patch file like the Subaru guys use.

I just uploaded a Stock M-box with this code http://nefariousmotorsports.com/forum/index.php?topic=152.0

Additional IMPORTANT Info!

Be aware that when using this method of launch control there is a time limit of 10.9 minutes for driving above the launch RPM. Therefore I suggest you set this appropriately high, somewhere above your normal cruising range. After 10.9 minutes the throttle shuts off until the RPM falls below the launch RPM... This is a potentially hazardous condition so please be aware and implement this code at your own risk!

Additional additional info

Thanks to k0mpresd I've learned certain ECU's need the map CWNMAXMD (8-bit) Codeword Drehzahlbegrenzung (Codeword for RPM limiter) changed from 0 to 1

-Brandon

EDIT: Correction the map is DNMAXH not DNMAX


 for 4B0 906 018 CH

VNMX        11AFB   8bit
DNMAXH     16494 16bit
ITNMXH     16498  16bit
NMAX        1649A  16bit
NMAXOG    164A2  16bit
TMOTNMX  1F9EA   8bit
TNMXH      164A6  16bit

Informação Original:  http://nefariousmotorsports.com/forum/index.php?topic=151.0

ECU Tuning - Guia de Referência

* follow the advice in the funktionsrahmen and set the values in LDRXNZK a bit lower than LDRXN. Em média o LDRXNZK é 15% menor que o LDRXN

* KFLDHBN (LDR-Höhenbegrenzung max. Verdichterdruckverhältnis, charge pressure control: upper limit [compressor pressure ratio]). Units (x,y,z): °C, RPM, ratio
   - Remarks: the S4 wiki notes that on a WOT run, the charge profile will follow LDRXN but because K03 and K04 turbochargers have significant flow limitations, unlike big turbochargers, charge pressure should peak before the engine speed limit then taper off. The compressor map for these turbochargers is shown in Figure 5.1. The ECUxPlot software has a pressure ratio/flow plotter that can be used use to compare against a turbo’s compressor map. The DTC 17963 “Charge pressure: Maximum limit exceeded” will result if boost deviation is too high. There is no difference between the BAM & BFV maps for charge pressure upper limit (compressor pressure ratio).

KFDLULS (Delta Druck für Überladeschutzdiagnose, pressure change for overboost protection diagnosis). Units (x,y,z): mbar, RPM, mbar
   - Remarks: The S4 wiki notes that if charge pressure is significantly higher than stock, or changes have been made to the boost PID control parameters, then consideration should be given to increasing these limits to avoid overboost protection activating at too low a threshold. The most unsophisticated way would be to simply set all the values in the table to maximum but since this will short-circuit an important safety feature, it is better to spend time iterating and optimizing appropriate values.


KRKTE  - is the constant for converting a reference load in % into fuel injection open time ms. So the units for this value are ms/%. The ecu calculates a reference load % based on the desired AFR. If the ecu wants to run rich, the reference load is higher than the actual load. If the ecu wants to run lean, the reference load is lower than the actual load. If the ecu wants to run at stoich, then the reference load is the same as the actual load. So if the reference load was 100% then the injection time would be KRKTE * 100. If you increase the size of your injectors, or increase your fuel pressure you need to scale this number down. If you decrease the size of your injectors, or decrease your fuel pressure you need to scale this number up.

MLHFM - is the table for converting MAF voltage in volts into air mass in grams/second. It should be a 1x512 map in the B5 S4. If you increase the size of your MAF housing you will need to scale this map up, and if you decrease the size of your MAF housing you will need to scale this value down.

TVUB - injection time offset based on voltage
TVTSPEV - injection time offset based on estimated injector temperature
FRLFSDP - injection time scaling factor based on predicted vacuum relative to outside pressure

Manuais Técnicos

* Diversos
   - http://www.vwclub.org.ua/modules/mydownloads/
 * Bosch
   - http://www.bosch-automotive.com/ecat-online/
 * Testando MAF
    - http://www.tuning.online.pt/DIY/diagnostico-maf.php
 * Boas Informações sobre VAG COM
    - http://www.clubegolfpt.com/forum/viewtopic.php?f=37&t=11702
* Documento PDF com informações do motor 1.8t audi golf
    - https://sites.google.com/site/magovit20v/home/arquivos/SAE1-1.8T-ULEV.pdf
 * Como funciona o EPC ( Eletronic Power Control ) ou Acelerador Eletrônico
   -  http://www.volkspage.net/technik/ssp/ssp/SSP_210.pdf

Dados técnicos

VWW 3323 / Golf IV 1.8 GTI Turbo / Golf IV / 1,8 / 142kW / 04/2007-05/2008 / AUQ

*  Injeção Bosh Motronic ME7.5
*  Cabeçote AUQ Small Port
   - Comando de Admissão -  058109021.M  -  7,67mm, 190°, 18°
   - Comando de Excape -  058109022.B  -  9,3mm, 210°, 10°
*  Velas de Ignição
   - Bosch FR7KI332S - Intervalo de troca 20.000 km
   - Bosch FR78
   -> Recomendável utilizar - NGK Iridium BR7EIX
*  Palhetas Parabrisa
   -  Bosch Aerotwin - 21/19 - Ar533s ( modelo descontinuado )
   -  Bosch Aerotwin -  AR21U e AR19U  << Modelo que substitui Ar533s
*  Palheta vidro traseiro
   -  3397004766
*  Filtro de combustível
   - 0986450236
*  Jogo de pastilhas de freio dianteiras
    - 0986BB0094 ou 0986424501
*  Jogo de pastilha de freio traseira
    - 0986BB0059
*  Bobina de ignição - 0986221024
*  Sonda Lambda Wideband LSU 4.2
     - 0258007351
*  Bico injetor
     - 0280156061
*  Kit Bomba de combustível int. tanque com acessórios
     - F000TE164W
*  Bomba de Combustível separada
     - F000TE0046
*  Correia Dentada
     - 1987949192 

   

Links ECU Tunning

* ME7.x Estudo da ECU
http://www.nefariousmotorsports.com/wiki/index.php/Main_Page

* Tuturial de Programação de ME7.x
http://s4wiki.com/wiki/Tuning

* Muitos arquivos
http://chomikuj.pl/shit-tzu/auta/Instrukcje

* ME 7.5 Tuning
http://s4wiki.com/wiki/Tuning