Here, copied from my old AZ post. Use the set of variables above, if it doesn’t work it may be one too many blocks. Remove charge air specified, and so on until it works. Also check block 39, ambient air pressure, and write it down so you can reference your true boost pressure.
J
[QUOTE=ilspazzaneve;7362756]Here’s what to log, to start. Go to the ENGINE controller, then hit ADVANCED MEAS VALUES:
http://www.ross-tech.com/vcds/tour/screenshots/open-screen.png
http://www.ross-tech.com/vcds/tour/screenshots/adv-meas-01.png
You’ll only be able to log 8 or so blocks at a time, any more and it won’t read. Note some of the block #s are different on different cars, but it’ll be close, just match the descriptor instead. Don’t forget to hit TURBO and GROUP UDS REQUESTS to speed up the sampling time.
Pick your blocks like below, then hit LOG, then START. Your log is a *.csv file, saved where you specified.
I’ll usually do a run like this at the beginning to get the ambient conditions and check to make sure everything is OK.
Group 10 - Field 0 Outside air temperature
Group 15 - Field 0 Vehicle speed
Group 25 - Field 0 Engine speed
Group 39 - Field 0 Ambient air pressure
Group 345 - Field 0 Air mass
Group 352 - Field 0 Intake manifold pressure
Group 538 - Field 0 Cat. temperature; bank 1
Group 544 - Field 0 TI_1_HOM[0] (this is cylinder 0 injection time)
Group 556 - Field 0 Intake air temperature
Group 566 - Field 0 Throttle valve angle (don’t be surprised if it only opens 80 degrees, that is normal)
Here’s a knock log with all cylinders (the individual cylinders show how much timing is being pulled per cylinder due to knock)
Group 15 - Field 0 Vehicle speed
Group 25 - Field 0 Engine speed
Group 216 - Field 0 IGA_AD_1_KNK[0]
Group 217 - Field 0 IGA_AD_1_KNK[1]
Group 218 - Field 0 IGA_AD_1_KNK[2]
Group 219 - Field 0 IGA_AD_1_KNK[3]
Group 220 - Field 0 IGA_AD_1_KNK[4]
Group 221 - Field 0 IGA_AD_1_KNK[5]
Group 222 - Field 0 Ignition angle; actual
Group 623 - Field 0 Charge air pressure specified value
Here’s one which I use to gauge performance
Group 15 - Field 0 Vehicle speed
Group 25 - Field 0 Engine speed
Group 216 - Field 0 IGA_AD_1_KNK[0]
Group 222 - Field 0 Ignition angle; actual
Group 233 - Field 0 Lambda probes actual; bank1
Group 345 - Field 0 Air mass
Group 352 - Field 0 Intake manifold pressure
Group 556 - Field 0 Intake air temperature
Group 623 - Field 0 Charge air pressure specified value
Group 625 - Field 0 RFP_AV
What to log:
Usually the best logs are long pulls in 3rd or 4th from a nice low RPM, say 2500 or lower, up to redline.
Some 1/4 mile logs are fun too, from a dig.
Start your log about 10 seconds before your running, at least, since you may find on a slow PC the log file starts a bit late.
The *.csv file
Try to limit your logs to the runs themselves, it’s a pain in the ass to wade through 9000 rows to look for the pulls. If you have 20 mins of logs, please try to edit it such that there are a few rows before, and a few runs after the pulls, but leave the headers on the rows.
For those with DSG
For those with an S-tronic tranny, get used to not activating the kickdown switch, or else the tranny will downshift and you won’t have a full pass in that gear. By “almost” flooring the accelerator pedal (you can actually feel the stiffness of the kickdown switch at this point), you’ll still get full throttle, but stay in the gear you wanted. You can check this with VCDS, the throttle will open to 85%/80degrees (this is full open, don’t worry).
Posting:
If you use gmail, that makes life a whole lot easier. Import your *.csv file to Google Docs as a spreadsheet. When you open the spreadsheet “file”, “Publish”, and copy the spreadsheet link and post it here. Easy!
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