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Old 12-28-2010, 09:30 AM   #1
xluben
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Join Date: Oct 2010
Location: Minneapolis, MN
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2012 Forester 2.5X
2002 WRX Sedan

Default Logging and Dyno Plots on an 08+ WRX for $10

Maybe this is already posted somewhere else, but it doesn't seem obvious so I thought I would put it out there and maybe save some people some money. I'm not very experienced with logging/tuning, so maybe this will work for logging other years as well. I got the impression (from reading the FAQ threads, HERE, HERE, HERE, HERE, etc) that I needed a $169 Tactrix cable to do anything on my 2011 WRX. Some of those posts specifically state that the Vag Com cable does not work with CAN BUS Ecu's. This is true for flashing, but not true for logging! Since I do not do any tuning myself I was very happy find that I could log (and create Virtual Dyno plots) for only a few dollars.

If you only want to log your car (not reflash the ECU) then you can use a $10 Vag Com cable from eBay!

eBay Link

(Hopefully that link works. You want one of the blue ones with a USB plug on the other end from the OBDII plug.)

Below I attempted to copy and paste the format from the "RomRaider/Ecuflash getting started FAQ" and edit it for using the Vag Com cable for logging only.

RomRaider/Ecuflash getting started FAQ

Quote:
Q: I want to log my Subaru with RomRaider and a $10 Vag Com cable. What do I need to do?
1. Purchase a Vag Com cable HERE. (Hopefully that link works. You want one of the blue ones with a USB plug on the other end from the OBDII plug.)
2. Set up Windows 7 to run XP mode, or use a computer with Windows XP Windows 7 XP Mode.
3. Download and install the correct drivers HERE.
4. Download and install the latest version of Java.
5. Download and install the latest RomRaider software.
6. Download and install the latest RomRaider logger definitions. There are two versions. Choose standard units if you wish to tune in imperial units (ex. psi, degrees F, mph, etc.) or metric units for metric units (ex. bar, degrees C, kmh, etc).
Note: Some of the download links above require you to register to the respective forum in order to download.

Q: How exactly do I install the logger definitions?
For RomRaider versions 0.5.1b and later:

1. Download the latest logger definitions file available HERE. Download the file of the units you prefer (either metric or standard).
2. Unzip the logger.xml file into your main RomRaider directory (or in another directory of your choice where it is unlikely to be moved or deleted).
3. Run Romraider's logger ("Logger" -> "Launch ECU Logger") and select "Settings" -> "Logger Definition Location" from the menu bar.
4. Select the location of the unzipped logger.xml file.

Q: Why do I need to install the logger definitions? Doesn't the latest RomRaider download include the newest definitions?
The RomRaider software (starting with version 0.5.1b) does not ship with any logger definitions. These will have to be downloaded and installed by the user in order for the software to be functional. This is to ensure that you have the latest version of the logger definitions at the time when you first install RomRaider. You also want to periodically check to see if there are new versions of the logger definitions in the future as these updates may include bug fixes, additional tables/parameters and additional ECU support.

Q: Can you give me a step-by-step on how to log with RomRaider?
1. Turn on your laptop.
2. Connect the USB end of your Vag Com cable to the laptop and the other end of the cable to the OBD-II port on your car (underneath the steering wheel).
3. Start RomRaider. Select Logger -> Launch Logger from the top menu.
4. In the logger's Settings menu, make sure "Control File Logging with Defogger Switch" is selected.
5. Turn the ignition key to on or start the vehicle.
6. Choose the correct COM port for your Vag Com cable from the drop down box in the upper left hand corner of the logger.
7. Select the parameters you wish to log in the left pane (the greater the number of parameters selected, the greater the sampling interval will be).
8. When you wish to log to a file, turn on the defogger. When you wish to end writing to that file, turn off the defogger. Each on/off sequence of the defogger will generate a separate file.

Q: Where are my log files saved?
In the logger, go to Settings->Log File Output Location to view or change the directory where the log files are saved.

Q. How do I open my log files?
Use any spreadsheet software that supports .csv files.
If you want to create a dyno plot, you will need to download Virtual Dyno.

To create a log for Virtual Dyno, you will want to do a WOT pull from 2,000rpm's up to redline. You will want to log the following parameters:
  • Time (automatically logged)
  • Engine Speed (rpm)
  • Manifold Relative Pressure (Corrected) (psi)
  • Throttle Opening Angle (%)
The program itself is very easy to use. You can drag and drop your .csv files into the program, set a few parameters for your vehicle and it will give you a dyno plot.

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Last edited by xluben; 01-24-2011 at 08:06 AM.
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Old 12-29-2010, 12:54 AM   #2
mistanoX
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2013 BRZ
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Default

so if I'm just trying to replace the OBD II to USB adapter on my accessport, because I broke off the USB side of it, it wont work will it? (aka what happens if I plug this thing into my accessport?)

is it missing a pin or two on the OBD II side that doesn't let it flash the ECU?

I'm guessing I'm going to have to get a direct replacement from Cobb aren't I? I've been searching all day, even on e-bay
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Old 12-29-2010, 12:18 PM   #3
Phatron
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you cant plug this into an AP
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Old 01-05-2011, 08:22 PM   #4
trepetti
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Default

Great stuff. I'll get the VCP drivers and start playing!

Which VagCom cable did you buy? I hate to wait 3 weeks and end up with a piece of #$@%.

FYI, the link on the 'drivers' line is truncated....the h in http is missing.
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Old 01-05-2011, 08:44 PM   #5
xluben
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2002 WRX Sedan

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I don't know which cable it was exactly. My brother already had it. Check the VW/Audi forums, I think they might have some recommended eBay sellers.

Thanks for the heads up on the broken link. I will try and fix it once I am on an actual computer and not my phone.
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Old 01-06-2011, 05:00 PM   #6
xluben
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2002 WRX Sedan

Default

Quote:
Originally Posted by trepetti View Post
Just gave it a whirl and could not connect to the ECU with either RomRaider or LearningView. I only have com3 listed as a connect option. When I installed the cable Win7x64 found a driver for the Ross-Tek cable. I didn't need to install the FTDI drivers.....wondering if that is the problem.

I am thinking about rebuilding the laptop with 32 bit XP and trying the FTDI drivers.
I am using Win7 64 bit. My computer will only show COM3 until I plug in the cable and manually installed the correct drivers. Once I did that my computer assigned the cable to COM4 and then COM4 showed up as an option on the RomRaider Logger.
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Old 09-26-2011, 03:12 AM   #7
ireallydriveabimmer
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Location: Cranston RI
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06 WRX
WRB HELLA FUNCTIONAL!!

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great write-up...i know there is always risk involved but i have a pretty good grasp on what to do...so what level of risk am i running doing this strictly logging? not flashing...i understand if u rele cant answer/ dont wanna be the guy that says itll b fine.
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Old 09-26-2011, 07:52 AM   #8
xluben
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I would think that the risk of logging alone would be very low.
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Old 12-06-2011, 07:03 PM   #9
ireallydriveabimmer
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im having an issue with the link in step 3....the one about the proper drivers... it just opens a blank tab...i would appreciate any help
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Old 12-06-2011, 07:16 PM   #10
xluben
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2002 WRX Sedan

Default

Quote:
Originally Posted by ireallydriveabimmer View Post
im having an issue with the link in step 3....the one about the proper drivers... it just opens a blank tab...i would appreciate any help
The link is missing an "h" in front of "http". Add that and it should work.
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Old 12-06-2011, 09:24 PM   #11
ireallydriveabimmer
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Location: Cranston RI
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WRB HELLA FUNCTIONAL!!

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thanks a lot man
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Old 12-07-2011, 10:48 AM   #12
dux10
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With the 08+ cars, do you need the Tactrix 2.0 to flash, or does the 1.3 cables work??
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Old 12-10-2011, 11:36 AM   #13
wayward167
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Never tried the 1.3 but both my tuner, and tactrix site say 2.0 is req'd
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Old 12-10-2011, 11:44 AM   #14
Phatron
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1.3 doesn't work on anything after 07....08+ is canbus and needs 2.0
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