[TDIwyse]

Originally Posted by GreekboyD

How accurate in your opinion is the "horse power at the wheels" data log?

Well, if you give it the correct total weight, and your OBD speed is accurate (OBD speed is accurate with OEM sized tires and is different than what the speedometer displays), and you're using flat roads and there's no wind ... then it can do a pretty good job of giving you wheel power - wind drag power - front wheel rolling resistance (you won't have wind drag losses on a dyno and unless you're on an AWD dyno you won't see the front tire rolling resistance losses). However it doesn't account for weather affects, which can also throw off validity.

My summer tires are way bigger diameter than OEM so the speed is off which lowers the power reading. And the 3rd gear pulls I normally use (so I'm less likely to loose my license if caught) happen pretty fast now, so the repeatability of the numbers it's giving isn't great. In stock form the car took longer to accelerate and the numbers were actually pretty good and repeatable.

I wouldn't recommend its power numbers as a good tuning tool at this point due to the above mentioned issues. Something that has worked really well for me, and does correct for weather variations and wind drag, is this app: https://play.google.com/store/apps/d...rfexpert&hl=en

[TDIwyse]

Originally Posted by highrollindreamz

any of u guys have a samsung s5...

I've used that one without issues. But I'm not sure why the free version wouldn't work for you. Sorry.

[iaknown]

Originally Posted by TDIwyse

I wouldn't recommend its power numbers as a good tuning tool at this point due to the above mentioned issues. Something that has worked really well for me, and does correct for weather variations and wind drag, is this app: https://play.google.com/store/apps/d...rfexpert&hl=en

Going to check that app out. What would you say is the most accurate device for doing "virtual" dyno runs? That G-meter gizmo you have? Or is an app like the above one just as good?

[iaknown]

Going to start a new thread on totally disabling the SCR system guys. We have a few discussions going on here so it'll help keep things separate. Come on over if you're interested....

[GreekboyD]

Originally Posted by TDIwyse

Well, if you give it the correct total weight, and your OBD speed is accurate (OBD speed is accurate with OEM sized tires and is different than what the speedometer displays), and you're using flat roads and there's no wind ... then it can do a pretty good job of giving you wheel power - wind drag power - front wheel rolling resistance (you won't have wind drag losses on a dyno and unless you're on an AWD dyno you won't see the front tire rolling resistance losses). However it doesn't account for weather affects, which can also throw off validity.

My summer tires are way bigger diameter than OEM so the speed is off which lowers the power reading. And the 3rd gear pulls I normally use (so I'm less likely to loose my license if caught) happen pretty fast now, so the repeatability of the numbers it's giving isn't great. In stock form the car took longer to accelerate and the numbers were actually pretty good and repeatable.

I wouldn't recommend its power numbers as a good tuning tool at this point due to the above mentioned issues. Something that has worked really well for me, and does correct for weather variations and wind drag, is this app: https://play.google.com/store/apps/d...rfexpert&hl=en

Thanks TDI. Great stuff.

[TDIwyse]

Originally Posted by iaknown

Going to check that app out. What would you say is the most accurate device for doing "virtual" dyno runs? That G-meter gizmo you have? Or is an app like the above one just as good?

So that link for the app uses the phones internal accelerometers. So it's similar to the Gtech device in that sense. But the app is able to download the weather conditions where your at and apply standardized correction factors, which the Gtech wouldn't, and also will remove wind drag (you need to ender Cd and frontal area), which the Gtech wouldn't. So at this point the app seems better to me ... this is assuming your phone has decent accelerometers and you follow the correct calibration procedure to calibrate them correctly.

[iaknown]

Originally Posted by TDIwyse

So that link for the app uses the phones internal accelerometers. So it's similar to the Gtech device in that sense. But the app is able to download the weather conditions where your at and apply standardized correction factors, which the Gtech wouldn't, and also will remove wind drag (you need to ender Cd and frontal area), which the Gtech wouldn't. So at this point the app seems better to me ... this is assuming your phone has decent accelerometers and you follow the correct calibration procedure to calibrate them correctly.

Good to know...

I have problems, anyone see a P02CA or 428B code?
TCU low-pressure stage error / Air-filling low-pressure stage control anomaly
(Boost Pressure Control of Large Turbo Control Deviation)
This is the first day I really got to drive the car some distance and I am going into limp mode every time I get on it.

[Yozh]

Iaknown, this us just a shot in the dark. When you were doing your Downpipe, did you disconnect the two upper temp sensors and an O2 sensor from their harnesses? If so, I believe there are some vacuum and electrical controls for the turbos in the same place. I would check.

[TDIwyse]

Originally Posted by iaknown

...
I have problems, anyone see a P02CA or 428B code?

I haven't seen those.

[iaknown]

Originally Posted by Yozh

Iaknown, this us just a shot in the dark. When you were doing your Downpipe, did you disconnect the two upper temp sensors and an O2 sensor from their harnesses? If so, I believe there are some vacuum and electrical controls for the turbos in the same place. I would check.

Hmmm, did not disconnect anything there but I will give a look over. Thanks
I know a few of my vacuum lines were frayed on the outside, but nothing all the way through.

What kind of boost are you guys seeing on Torque? I saw a few highs at 35/36 today. Too much?

[TDIwyse]

Originally Posted by iaknown

Hmmm, did not disconnect anything there but I will give a look over. Thanks
I know a few of my vacuum lines were frayed on the outside, but nothing all the way through.

What kind of boost are you guys seeing on Torque? I saw a few highs at 35/36 today. Too much?

So if my memory is correct, Torque doesn't actually see the MAP sensor, but uses a calculation method based on MAF readings, rpm and what you enter for volumetric efficiency to get is "boost" value. We'd have to use the same volumetric efficiency and have a similar responding MAF to have similar values ... and I'm not exactly sure what I have for VE at the moment. But I dialed it in to agree with what I was seeing with the Bavarian Tech tool and what it measured the MAP sensor giving for peak boost numbers. So I usually peak at about 30-31psi (above normal atmospheric pressure) for full fueling mid/high rpm conditions and it holds that value for almost all the rpm range.

Does your boost peak and fall, or hold steady at the number you are seeing? If it's overboosting and then falling, then that would be different than I see with Torque or the Bav Tech tool or BMWhat...

[iaknown]

This is the best I have right now. Still familiarizing myself with Torque and only had time to log one graph. It kind of sucks but you can see the highs along with the gear changes. And to answer your question Tdi, it certainly doesn't look like a steady rate to me, but that could be because of the lame graph. This read graphing choice gives vacuum and boost though so maybe it is off the MAP on the car?

By the way, how would I spread the graph out on Torque, what would I change?

[TDIwyse]

Originally Posted by iaknown

This is the best I have right now. Still familiarizing myself with Torque and only had time to log one graph. It kind of sucks but you can see the highs along with the gear changes. And to answer your question Tdi, it certainly doesn't look like a steady rate to me, but that could be because of the lame graph. This read graphing choice gives vacuum and boost though so maybe it is off the MAP on the car?

By the way, how would I spread the graph out on Torque, what would I change?

I don't try to graph stuff in Torque, but instead export the log files to a spreadsheet. That way you you have much better control of processing the data/graphs. From your HUD display go to the menu and there are the options for START/STOP logging (it'll save the data you setup in your "what to log" option which is independent of what's on the screen being displayed), as well as the selection to Email Logs (logs are time/date stamped so it's easy to see which log file is which).

Your graph looks a little troubling in terms of overboost. Think Yozh's suggestion is a good one.

[iaknown]

Originally Posted by TDI

I don't try to graph stuff in Torque, but instead Excelrt the log files to a spreadsheet. That way you you have much better control of processing the data/graphs. From your HUD display go to the menu and there are the options for START/STOP logging (it'll save the data you setup in your "what to log" option which is independent of what's on the screen being displayed), as well as the selection to Email Logs (logs are time/date stamped so it's easy to see which log file is which).

Your graph looks a little troubling in terms of overboost. Think Yozh's suggestion is a good one.

Thanks Tdi. Just curious, what do you use to handle the spreadsheet? Excel? Can it take the data and plot a graph? I think I've seen you do that before....

[TDIwyse]

Originally Posted by iaknown

Thanks Tdi. Just curious, what do you use to handle the spreadsheet? Excel? Can it take the data and plot a graph? I think I've seen you do that before....

Excel would work great. I've been using Open Office. Basically any spreadsheet tool should work. You just need to import the .csv log file and then you can plot whatever you want. If you log rpm along with the boost, AFR, EGT's, etc. then you can also make the graph so rpm is on the x-axis and the other other parameters are on the y-axis. That's very helpful for looking at full fueling tests. Basically you can tell Torque to "start logging" before you do a test, then "stop logging" after the test, and this way you don't have a bunch of useless data...

[iaknown]

Originally Posted by TDIwyse

Excel would work great. I've been using Open Office. Basically any spreadsheet tool should work. You just need to import the .csv log file and then you can plot whatever you want. If you log rpm along with the boost, AFR, EGT's, etc. then you can also make the graph so rpm is on the x-axis and the other other parameters are on the y-axis. That's very helpful for looking at full fueling tests. Basically you can tell Torque to "start logging" before you do a test, then "stop logging" after the test, and this way you don't have a bunch of useless data...

Thanks again for the info. Talked to Stan and he gave me a good pointer, to plot actual boost against desired boost. I either have a boost leak or a controller problem. Torque is useless because its not actual values as you pointed out, and it doesn't support requested boost anyway. Guess I gotta wait for a BMWhat adapter...

[iaknown]

Oh and by the way.....DEF countdown warning came on today....

[Yozh]

Iaknown, I could not find the actual vs desired in the BMWhat app. Have figured out data in Torque and it is awesome. Thanks TDI. Can post samples here, but feel we are getting so many topics going here.

For the DEF countdown, looks like you are in the same club as some of us.

[Yozh]

Posted a new thread covering the Torque Pro App.

Here: http://www.e90post.com/forums/showthread.php?t=1026509

Searched, and could not find anything super dedicated

[TDIwyse]

Originally Posted by iaknown

Thanks again for the info. Talked to Stan and he gave me a good pointer, to plot actual boost against desired boost. I either have a boost leak or a controller problem. Torque is useless because its not actual values as you pointed out, and it doesn't support requested boost anyway. Guess I gotta wait for a BMWhat adapter...

You might need something like the Bav Tech tool, which is what I breakout for something like this. Here's some of my Ecotune/downpipe data on the desired/actual boost from back in April on this thread:

http://www.e90post.com/forums/showpo...&postcount=701

If you're getting MAP numbers over 3100 mbar I'd expect there's an issue that may be hardware related.

[TDIwyse]

Originally Posted by iaknown

Oh and by the way.....DEF countdown warning came on today....

This is puzzling. I didn't do anything I'd consider "special" in regards to draining the tanks and i haven't gotten this warning that you and others are seeing...

I did have a service appointment prior to the whole remap/DPF shipping experience. There was a DDE software update done and then the typical DEF fillup. So the DDE was up to the latest revision and DEF was completely full (active and passive tanks). There was less than 100 miles driven in this state before the DDE was pulled and sent in for the flash and after the car was back up and driveable the DEF was drained. Then distilled water added back into both tanks, driven around for awhile, and then completely drained both tanks again...

Not sure if any of these variables are related?

[BMW335D88]

why you guys don t speak with who tune your cars and ask what is going on?