Improper calibration may cause damage to your vehicle or it's related components. |
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The first step in tuning is choosing a COBB Tuning Off-The-Shelf (OTS) calibration that most closely matches the mechanical components and modifications of the transmission to be tuned. COBB OTS maps and tuning guides are meant for stock DSG transmission. COBB does not have specific advice on how to set up DSG transmission with aftermarket clutches.
The features vary across different COBB 7 speed DSG OTS mapping. The following matrix reveals the various features within the COBB OTS mapping. For more information about each map refer to the map notes for the particular vehicle.
Torque Limit Removed | Gear Display (In All Modes) | Shift Delay (in Manual Mode) | Shift Time Decreased | Kickdown Disabled in TT | Launch Counter Disabled | Low Throttle Shift RPM | |
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Installed Stock | 1100 RPM | ||||||
COBB OEM+ | X | X | X | X | X | X | 1100 RPM |
COBB Sport | X | X | X | X | X | X | 1500-2200 RPM |
COBB Aggressive | X | X | X | X | X | X | 1700-2400 RPM |
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Accesstuner software allows the user to visualize, sample and record critical engine parameters including sensor information and commanded transmission function.
To setup displayed parameters on the live "Dashboard" press "Ctrl+F" to configure the logged parameters in the "Log List" tab, and those displayed in the Accesstuner "Dashboard" through the "Gauge List" tab. The Dashboard, a screen that reports active transmission and sensor parameters, can be accessed by pressing "Ctrl+B." It is critical to actively monitor the condition of the motor during tuning and this screen is the single best way to do so. These data monitors allow the tuner to determine if a calibration is performing correctly. Accurate and deliberate assessment of logged parameters is the only way to avoid conditions that may damage the transmission.
While connected to a running vehicle press "Ctrl+F" and select the "Log List" tab to select the parameters displayed in saved Accesstuner logs. When data logging is enabled (Ctrl-D) these parameters will be permanently written to a comma delimited data file.
This is a screen shot of some of the available parameters to display in the live dashboard gauges (Gauge List tab) or to be recorded in the data log file (Log List tab). The most up to date list of monitors is always available on the page Engine Monitor List for Volkswagen & Audi MQB Vehicles
Configure recorded (datalog) parameters in the "Log List" tab |
The selected parameters are those that are critical to record under most conditions. Other parameters may be selected or removed based upon the objectives of any specific tuning process.
To a point, you can increase clutch overlap in order to allow the transmission to shift faster. This works because if the transmission is able to begin engaging the next (alternate) clutch while the first clutch is still pressurized, the shift can be accomplished in less time. Use tables located in the “Clutch Overlap” folder. These tables are organized by drive mode. Note that in Sport mode the overlap is longer (faster shifts) than in smoother modes such as ECO. COBB OTS maps slightly increase overlap in a subsection of the overlap targets used while in TT mode.
These values can be changed in order to reduce shift times, however going too far can cause catastrophic damage to the transmission. |
The fact that the Z data is indicated in vehicle speed makes it difficult to easily relate the information within the table, to a real-world result. The best strategy in order to manage more meaningful z data is to convert this table into Engine Speed (rpm). While there isn't a factory table that does so, using available knowledge of gear ratios and some basic math, we can figure it out fairly easily.
In order to display this vehicle speed as engine RPM per gear we must know the conversion. For the 7 speed cars there are TWO different gear ratios. Front wheel drive 2.0-liter GTI and A3 use the following gear ratio/conversion.
Row Labels | Average of Ratio |
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1 | 0.009094651 |
2 | 0.013563425 |
3 | 0.021456933 |
4 | 0.030804481 |
5 | 0.039532642 |
6 | 0.050773494 |
7 | 0.058401822 |
Row Labels | Average of Ratio |
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1 | 0.005156139 |
2 | 0.007985086 |
3 | 0.011648665 |
4 | 0.015738731 |
5 | 0.02075983 |
6 | 0.026033506 |
7 | 0.033694802 |
After a lot of time driving these DSG 7 speed transmissions our impression was that Sport mode was perfect for very spirited driving but that Normal mode shift schedules were not aggressive enough. The car tended to use higher gears to early in the rev range. To create a balanced map we blended ECO (normal) and Sport mapping. These first OTS maps were done as a blend. You can see how this was accomplished on the bottom section of these tuning guide spreadsheets.
The upper section is stock ECO shift schedule. The middle section is sport. The lower section is a blend of eco and sport. In each row the ratio of “sport” to “eco” shift mapping is determined by the red numbers to the left. You can use this spreadsheet to create your own custom blended tables.
Finally, your finished shift schedule can be pasted back into the top of the spreadsheet in KPH to get the data translated into engine RPM.