There aren't too many datalogs posted on the forum and one of the reasons for this is that the forum doesn't have native support for hosting the .csv file type and people are a little reluctant to log.
Here's a quick crash course on how to log and how to share/post these to generate discussion. You don't need ATR to download, view, and share logs. With a modified car, it is always good to periodically take logs and make sure there are no issues. This is also an excellent way to check how the tune you are running performing with your fuel and modifications.
1. First of all, make sure you have the correct map loaded on your AP and that you've driven the car with that map and the usual fuel you use for a good 20-40 miles to allow fuel trims to settle.
2. Set the correct logging parameters in the AP. We created a short video on how to change logging parameters for the AP V3. This is the same for the Focus or any other platform supported by the COBB AP V3.
COBB has also posted a number of useful videos. This following one is for the AP V2
3. A basic set of parameters to log are these:
Accelerator Pedal Position (The throttle pedal position. This is not the same as the throttle plate since the car is drive by wire. This is just what the driver is doing with the pedal)
Actual AFR (Yes the car comes with a stock wideband O2!. This is the actual AFR. Lower numbers are richer, higher numbers are leaner)
Airflow Mass (The Focus ST uses speed density to estimate actual mass airflow using its pre and post throttle pressure sensors. It is a calculation based on a model, not a direct measurement like MAF based cars)
Boost Pressure Actual (Boost measured at the manifold)
Charge Air Temp. – (CAT) (This is the temperature measured AFTER the intercooler before the throttle body. If too high power will be reduced and it tells you if your intercooler is overworked)
Coolant Temperature (Important for the car to be warm when logging. ECU applies compensations based on coolant temperature)
Engine Speed (Engine RPM)
ETC Actual Angle (The throttle plate position angle)
Fuel Rail Pressure Actual (What pressure the injectors are seeing. This is important that it stays constant at WOT around 2100-2200psi)
Ignition Timing Corr. Cyl (1-4) (This is where the ECU pulls timing mostly due to knock. If you see large negative corrections you need to adjust the tune for the fuel you are using)
Ignition Timing (Cyl 1) (This is the amount of timing advance currently running after all reductions are applied)
Load Actual (Amount of load the engine is seeing. This is related to airflow and engine speed and is used in a lot of engine calculations)
WGDC Actual (Wastegate Duty Cycle - this is what controls your boost pressure)
STFT (Short Term Fuel Trim - these are quickly changing corrections to the fueling mixture based on the feedback from the wideband O2)
LTFT (Long Term Fuel Trim - these are learned correction factors based on feedback from the wideband O2)
A more advanced list is this:
- Accel Pedal Position
- Actual AFR
- Boost Pressure
- Charge Air Temp.
- Coolant Temp.
- ETC Angle Actual
- Engine RPM
- FRP Actual
- Ign Corr. Cyl1
- Ign Corr. Cyl2
- Ign Corr. Cyl3
- Ign Corr. Cyl4
- Ign Timing Cyl3
- LTFT
- Load Actual
- Oct Adj Ratio Lrn
- STFT
- WGDC Actual
A note on the parameters being logged. If you are logging all the ones in the advanced list make sure your display parameters are some of these. Adding additional display parameters that are not also logged will exceed the logging bandwidth for the AP and you will get an error to remove some parameters.
4. After setting the AP correctly, take the car to a safe, straight, long piece of road and set the AP to be ready to start logging. Get in 3rd gear or 4th gear and hold the RPMs steady at around 2500RPM.
5. Press the center button of the AP to start the log.
6. Floor the throttle and hold your foot down to redline.
7. Get off the throttle, slow down safely.
8. Stop the log by pressing the center button.
You can repeat steps 4-8 as many times as you like to take more logs.
Datalogs generated by the COBB AP are in the .csv format. This format is can be opened and viewed on your computer with a number of programs. The most popular are:
- Microsoft Excel
- Open Office
- You can upload these to your Google Drive and open them from there. Google Drive has built in support.
Using the AP Manager you can download these logs from your AP. Link to the AP manager below.
COBB Tuning - Ford Accessport V3
Now you want to share these. Simple stuff due to the number of cloud services available.
1. Get an account with Google Drive, Dropbox, etc. It's free and datalogs take very little space so you should have no problem hosing these. I will used Dropbox as an example.
https://www.dropbox.com/
2. Upload the log to your Public Folder on Dropbox.
3. Right click on the log and select -> Copy Public Link.
Paste that link in your thread on the forum like this:
https://dl.dropboxusercontent.com/u/48912771/Focus ST Logs/2013 Focus Stage 1 93 LT 20130108.csv
Here's something else fun to do to check your performance. If you take logs on a nice, flat, stretch of road you can use these logs to estimate the power your car is making using a tool called Virtual Dyno which is actually free. This is a lot cheaper and if you are consistent can be an excellent tool to see what changes to your tune and hardware are doing:
http://www.virtualdyno.net/
A Vdyno sample below:
![]()
Done! Happy Logging and Sharing!
Here's a quick crash course on how to log and how to share/post these to generate discussion. You don't need ATR to download, view, and share logs. With a modified car, it is always good to periodically take logs and make sure there are no issues. This is also an excellent way to check how the tune you are running performing with your fuel and modifications.
1. First of all, make sure you have the correct map loaded on your AP and that you've driven the car with that map and the usual fuel you use for a good 20-40 miles to allow fuel trims to settle.
2. Set the correct logging parameters in the AP. We created a short video on how to change logging parameters for the AP V3. This is the same for the Focus or any other platform supported by the COBB AP V3.
COBB has also posted a number of useful videos. This following one is for the AP V2
3. A basic set of parameters to log are these:
Accelerator Pedal Position (The throttle pedal position. This is not the same as the throttle plate since the car is drive by wire. This is just what the driver is doing with the pedal)
Actual AFR (Yes the car comes with a stock wideband O2!. This is the actual AFR. Lower numbers are richer, higher numbers are leaner)
Airflow Mass (The Focus ST uses speed density to estimate actual mass airflow using its pre and post throttle pressure sensors. It is a calculation based on a model, not a direct measurement like MAF based cars)
Boost Pressure Actual (Boost measured at the manifold)
Charge Air Temp. – (CAT) (This is the temperature measured AFTER the intercooler before the throttle body. If too high power will be reduced and it tells you if your intercooler is overworked)
Coolant Temperature (Important for the car to be warm when logging. ECU applies compensations based on coolant temperature)
Engine Speed (Engine RPM)
ETC Actual Angle (The throttle plate position angle)
Fuel Rail Pressure Actual (What pressure the injectors are seeing. This is important that it stays constant at WOT around 2100-2200psi)
Ignition Timing Corr. Cyl (1-4) (This is where the ECU pulls timing mostly due to knock. If you see large negative corrections you need to adjust the tune for the fuel you are using)
Ignition Timing (Cyl 1) (This is the amount of timing advance currently running after all reductions are applied)
Load Actual (Amount of load the engine is seeing. This is related to airflow and engine speed and is used in a lot of engine calculations)
WGDC Actual (Wastegate Duty Cycle - this is what controls your boost pressure)
STFT (Short Term Fuel Trim - these are quickly changing corrections to the fueling mixture based on the feedback from the wideband O2)
LTFT (Long Term Fuel Trim - these are learned correction factors based on feedback from the wideband O2)
A more advanced list is this:
- Accel Pedal Position
- Actual AFR
- Boost Pressure
- Charge Air Temp.
- Coolant Temp.
- ETC Angle Actual
- Engine RPM
- FRP Actual
- Ign Corr. Cyl1
- Ign Corr. Cyl2
- Ign Corr. Cyl3
- Ign Corr. Cyl4
- Ign Timing Cyl3
- LTFT
- Load Actual
- Oct Adj Ratio Lrn
- STFT
- WGDC Actual
A note on the parameters being logged. If you are logging all the ones in the advanced list make sure your display parameters are some of these. Adding additional display parameters that are not also logged will exceed the logging bandwidth for the AP and you will get an error to remove some parameters.
4. After setting the AP correctly, take the car to a safe, straight, long piece of road and set the AP to be ready to start logging. Get in 3rd gear or 4th gear and hold the RPMs steady at around 2500RPM.
5. Press the center button of the AP to start the log.
6. Floor the throttle and hold your foot down to redline.
7. Get off the throttle, slow down safely.
8. Stop the log by pressing the center button.
You can repeat steps 4-8 as many times as you like to take more logs.
Datalogs generated by the COBB AP are in the .csv format. This format is can be opened and viewed on your computer with a number of programs. The most popular are:
- Microsoft Excel
- Open Office
- You can upload these to your Google Drive and open them from there. Google Drive has built in support.
Using the AP Manager you can download these logs from your AP. Link to the AP manager below.
COBB Tuning - Ford Accessport V3
Now you want to share these. Simple stuff due to the number of cloud services available.
1. Get an account with Google Drive, Dropbox, etc. It's free and datalogs take very little space so you should have no problem hosing these. I will used Dropbox as an example.
https://www.dropbox.com/
2. Upload the log to your Public Folder on Dropbox.
3. Right click on the log and select -> Copy Public Link.
Paste that link in your thread on the forum like this:
https://dl.dropboxusercontent.com/u/48912771/Focus ST Logs/2013 Focus Stage 1 93 LT 20130108.csv
Here's something else fun to do to check your performance. If you take logs on a nice, flat, stretch of road you can use these logs to estimate the power your car is making using a tool called Virtual Dyno which is actually free. This is a lot cheaper and if you are consistent can be an excellent tool to see what changes to your tune and hardware are doing:
http://www.virtualdyno.net/
A Vdyno sample below:
Done! Happy Logging and Sharing!
