Ran some Vag logs for fun with stock box and VTDA.................
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AudiWorld Super User
Joined: Apr 2004
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Ran some Vag logs for fun with stock box and VTDA.................
I really did this for my own education to get more familiar with Vag-Com and Excel charting. You be the judge, the results are by no means scientific. A lot plays into this including the driver. I tried to keep each run the same as possible, actually on my driveway. The second group of charts is with the OEM fender feed to the stock box removed.
<img src="http://images28.fotki.com/v1002/photos/6/645139/2489087/StockBoxRun1-vi.jpg">
<img src="http://images29.fotki.com/v1016/photos/6/645139/2489087/StockBoxRun2-vi.jpg">
<img src="http://images27.fotki.com/v1018/photos/6/645139/2489087/StockBoxnoFeedScreenedRun1-vi.jpg">
<img src="http://images27.fotki.com/v990/photos/6/645139/2489087/StockBoxnoFeedScreenedRun2-vi.jpg">
<img src="http://images27.fotki.com/v1023/photos/6/645139/2489087/VTDARun1-vi.jpg">
<img src="http://images28.fotki.com/v1000/photos/6/645139/2489087/VTDARun2-vi.jpg">
The MAF Sensor was the same in each run. I wish I had logged the inlet air etc for the stock box, with the feed but I didn't think of it at the time. I also tried to keep the RPM about the same. These were all logged in first gear, the second gear readings were about the same.
BTW, the inlet air temps are probably higher for the VTDA because the engine didn't fully cool after the second group of runs. The first group was run a day or two ago.
<img src="http://images28.fotki.com/v1002/photos/6/645139/2489087/StockBoxRun1-vi.jpg">
<img src="http://images29.fotki.com/v1016/photos/6/645139/2489087/StockBoxRun2-vi.jpg">
<img src="http://images27.fotki.com/v1018/photos/6/645139/2489087/StockBoxnoFeedScreenedRun1-vi.jpg">
<img src="http://images27.fotki.com/v990/photos/6/645139/2489087/StockBoxnoFeedScreenedRun2-vi.jpg">
<img src="http://images27.fotki.com/v1023/photos/6/645139/2489087/VTDARun1-vi.jpg">
<img src="http://images28.fotki.com/v1000/photos/6/645139/2489087/VTDARun2-vi.jpg">
The MAF Sensor was the same in each run. I wish I had logged the inlet air etc for the stock box, with the feed but I didn't think of it at the time. I also tried to keep the RPM about the same. These were all logged in first gear, the second gear readings were about the same.
BTW, the inlet air temps are probably higher for the VTDA because the engine didn't fully cool after the second group of runs. The first group was run a day or two ago.
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AudiWorld Super User
Joined: Apr 2004
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I tried that with two runs, but like you said the RPM doesn't show properly for each plot......
there may be a way, Maybe someone can tell me how to do that. Maybe I needed to set some sort of marker.
AudiWorld Senior Member
Joined: Jun 2004
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You have to add rows in Excel spreadsheet and then copy/paste the time & RPM data
for each run into one column (the first time and first RPM column). Once you get the time and RPM data for all runs in a single time and single RPM column, delete the extra time and RPM columns.
Each data run (g/sec) will be a separate column. So when done, your work sheet headings will be:
TIME
RPM
run 1 (g/s)
run 2 (g/s)
run 3 (g/s)
etc.
You can then graph all runs on a single chart.
You did this on your driveway???? Must be pretty long.
These were all 3rd gear runs, right?
Each data run (g/sec) will be a separate column. So when done, your work sheet headings will be:
TIME
RPM
run 1 (g/s)
run 2 (g/s)
run 3 (g/s)
etc.
You can then graph all runs on a single chart.
You did this on your driveway???? Must be pretty long.
These were all 3rd gear runs, right?
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