The download of the original engine map isn't necessary in most cases. If the tuning company already has the engine map for that model vehicle and vehicle engine, they modify the file they already have. I believe the option is for vehicles/engines that are not already in their database. This is also localized to the Mychiptuning company, none of the other companies need your ECU file nor ask for it.If it's a late Bosch Tri-core ECU I bet it will be a bench flash using Alientech or similar. Bench flash isn't for the inexperienced and you need to be brave enough to get the sealed ECU lid open first. To do ECU flash via OBDII you need dealer or cloned software tools which only use genuine V.W OE encrypted flash files. Unencrypted flash files manipulated with Winols are usually bench flash. An 07 ECU isn't tri-core and can accept an unencrypted binary file via OBD. Here's the key phrase:
With these tools, you will be able to copy the original engine maps from your vehicle and upload them to our tuning service. Once we have produced custom tuning files for you, you will be able to download them back to your vehicle. These tools make the process easy and simple.
The hard and expensive part is buying the software tools to do the read first and being sure you can write the modified file back to a Tri-core ECU. Just trying to read a tri-core ECU incorrectly can brick it.
I hope that works for you because the ECU has personality data e.g immo codes, dpf data for diesels, odo data etc. I think the VIN is in there too. The only way they can keep the original data is by selectively writing back the mapping block, but then I think the CRC end of file code will need to be recalculated. The price of the tune file will be a lot less than the software tool to use it.If the tuning company already has the engine map for that model vehicle and vehicle engine, they modify the file they already have.
You can do a simple Google search for Volkswagen ECU engine tune. Thousands of owners have done ECU tunes, this isn't new technology. I personally don't know the intricacies of applying a tune directly to the vehicles ECU, but the companies such as APR, United Motorsports etc. do. If I were to take a stab at what they are doing, their method of tuning does not compromise or overwrite any of that personality data you mentioned, so its not like wiping a hard drive and reinstalling a OS, its more like they are over writing specific areas of the OS, keeping the personality data intact.I hope that works for you because the ECU has personality data e.g immo codes, dpf data for diesels, odo data etc. I think the VIN is in there too. The only way they can keep the original data is by selectively writing back the mapping block, but then I think the CRC end of file code will need to be recalculated. The price of the tune file will be a lot less than the software tool to use it.
Vox,It seems a good idea but the admins might be concerned that non OE tuning files from suspect sources critical to the running of an EOS were being used? There are many autotech. savvy people using WinOls working from their bedrooms and selling on their popup websites. There are even free access sites with hundreds of tuning files. You wouldn't be able to trust what was being hosted and swapped. Bona Fide firms with a good reputation for selling custom tune files will probably protect their products to use with matching software keys. People will then start trying to use ripped off copies of dongles and tuning software which carries a huge risks of corrupting their ECU.
If you want to experiment with that kind of thing at your own risk, then have a look at specific tuning forums like Digital Kaos and the Garage forums - plenty of dodgy files swapped there, judging by the lengths of some of the threads, what goes wrong and requests to recover blocked ECUs. You won't get any of the max torque after an ECU reflash if you turn on the key and nothing happens!
I experimented a little with bench reflash because that method writes direct to ECU memory using WinOls readable unencrypted binaries. However, I decided to get a used ECU with the same board version and that's what I play tunes with. Get a problem and I can revert back to the OE. Handy strategy if I am forced to use a Stealer who might overwrite a remapped ECU without asking.