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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Zasquatch's COBB Datalog Grapher - Graph logs with a few simple clicks!



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      03-27-2012, 10:42 AM   #23
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Quote:
Originally Posted by Dr_Dirt View Post
Nice it works!
Here is my COBB Stage 1+ Aggressive, not sure why boost dropped, can anyone tell?
http://www.e90post.com/forums/attach...1&d=1332641512
Boost is supposed to taper down to about 13's by redline. It peaks in the 4500 range.
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      03-27-2012, 10:43 AM   #24
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Quote:
Originally Posted by Zasquatch View Post
Why would you want that? The graph would get messy, as RPM is not generally linear. Data starts looking weird and skewed when graphed against a non-linear scale. From my experience, RPM typically isn't of that much concern when looking at logs... more of a reference point. I usually just note the x value of the point (time), go to the data table, and see what RPM I was at given the time.

But again, if there is enough desire it can be added.
ahh i gotcha. I was just going from what I've seen on dyno graphs. How they have their RPM's going along with the axis at the bottom, that way you have two axis on the side for other data scales.
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      03-27-2012, 02:11 PM   #25
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You can also graph COBB logs using Virtual Dyno.
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      03-27-2012, 04:17 PM   #26
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Quote:
Originally Posted by Nor_Cal_335i View Post
You can also graph COBB logs using Virtual Dyno.
You can.... I never liked the output format though... Hence why I made this
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      03-27-2012, 06:59 PM   #27
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Quote:
Originally Posted by Nor_Cal_335i View Post
You can also graph COBB logs using Virtual Dyno.
Correct but it's nice to say numbers on the y axis instead of having to probe along the lines.
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      03-27-2012, 07:01 PM   #28
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Quote:
Originally Posted by Zasquatch View Post
You can.... I never liked the output format though... Hence why I made this
I've been trying to make it work on my windows7+office2010 setup with no luck now. Have you tried it? if yes then may be I need to share my error codes.

Thanks for taking the time to write this script
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      03-27-2012, 08:15 PM   #29
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Quote:
Originally Posted by marv85 View Post
I've been trying to make it work on my windows7+office2010 setup with no luck now. Have you tried it? if yes then may be I need to share my error codes.

Thanks for taking the time to write this script
Yep I've got no problems in win7/office 2010. What/where are you getting errors? And are you using COBB logs from a more recent firmware? Let me know, we'll figure it out.

If you want, post up your log and I'll try to open it on my end... (zip it first and you should be able to attach it I think, otherwise change the extension)

Last edited by Zasquatch; 03-27-2012 at 08:27 PM.
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      03-27-2012, 09:00 PM   #30
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Quote:
Originally Posted by Zasquatch View Post
Yep I've got no problems in win7/office 2010. What/where are you getting errors? And are you using COBB logs from a more recent firmware? Let me know, we'll figure it out.

If you want, post up your log and I'll try to open it on my end... (zip it first and you should be able to attach it I think, otherwise change the extension)
Yes I am using the latest firmware. I attached the log. let's see if it works on your end. changed extension to txt

Thanks!
Attached Files
File Type: txt 3rd_gear_pull_3_17.txt (16.7 KB, 49 views)
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      03-28-2012, 06:39 AM   #31
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Originally Posted by marv85 View Post
Yes I am using the latest firmware. I attached the log. let's see if it works on your end. changed extension to txt

Thanks!
Just uncheck "WOT Datalog" and try again... You didn't log Accel Ped Pos, so you can't use the data cleaning option.

The result will be a left hand scale that is in the hundreds due to timing and AFR prior to the pull, but just double click the scale and choose 20+/- as your max and you'll have a nice clean plot.

You also will prob need to change line colors... mine came up all pastels...
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      03-28-2012, 09:55 AM   #32
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Quote:
Originally Posted by Zasquatch View Post
Just uncheck "WOT Datalog" and try again... You didn't log Accel Ped Pos, so you can't use the data cleaning option.

The result will be a left hand scale that is in the hundreds due to timing and AFR prior to the pull, but just double click the scale and choose 20+/- as your max and you'll have a nice clean plot.

You also will prob need to change line colors... mine came up all pastels...
Ahh I see, I read the debug window but I keep confusing pedal pos with TPS (I find it more useful to log TPS) and so I blamed your script .

I'll give it a try, thanks
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      03-28-2012, 10:18 AM   #33
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Quote:
Originally Posted by marv85 View Post
Ahh I see, I read the debug window but I keep confusing pedal pos with TPS (I find it more useful to log TPS) and so I blamed your script .

I'll give it a try, thanks
Right on. Yeah, TPS tells you more, but I log Pedal Position to make sure throttle closures aren't due to me accidentally letting off the gas...

Last edited by Zasquatch; 03-28-2012 at 10:54 AM.
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      03-28-2012, 10:26 AM   #34
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Quote:
Originally Posted by Zasquatch View Post
Right on. Yeah, TPS tells you more, but I log Pedal Position to make sure "events" aren't due to me accidentally letting off the gas...
Yup, it makes more sense to use the Pedal to Display WOT runs
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      03-28-2012, 04:13 PM   #35
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Quote:
Originally Posted by Zasquatch View Post
You can.... I never liked the output format though... Hence why I made this
Cool. Good job btw.

Quote:
Originally Posted by marv85 View Post
Correct but it's nice to say numbers on the y axis instead of having to probe along the lines.
Okay. I find it works better for tuning to probe over the line and know the exact data at a certain RPM point. Guessing the data by using the numbers on the y axis isnt something I would do while tuning someones car.
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      03-28-2012, 04:41 PM   #36
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Quote:
Originally Posted by Nor_Cal_335i View Post
Cool. Good job btw.
Thanks man.

Quote:
Originally Posted by Nor_Cal_335i View Post
Okay. I find it works better for tuning to probe over the line and know the exact data at a certain RPM point. Guessing the data by using the numbers on the y axis isnt something I would do while tuning someones car.
You can still select a point and see the x and y values... it's a built in feature of Excel
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      03-28-2012, 07:51 PM   #37
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Quote:
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Thanks man.



You can still select a point and see the x and y values... it's a built in feature of Excel
I know. I just have always liked standalone applications over excel worksheets.
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      03-29-2012, 06:48 AM   #38
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I know. I just have always liked standalone applications over excel worksheets.
LOL so don't use it
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      03-29-2012, 02:29 PM   #39
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LOL so don't use it
Dont worry, I wont. LOL.
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      03-29-2012, 03:07 PM   #40
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Okay. I find it works better for tuning to probe over the line and know the exact data at a certain RPM point. Guessing the data by using the numbers on the y axis isnt something I would do while tuning someones car. [/quote]

As mentioned you can probe the data points with excel when you need to know the exact numbers.
however, when you're looking at the overall shape it's nice to roughly know the y values.
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      03-30-2012, 06:18 AM   #41
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Is anyone having issues with the last step of the code, i.e. graph format and axis labels? There seems to be an isolated issue with office 2007 that I cannot replicate for the life of me.

The graph should look like this, wide-screen with axis labels for the data you included:
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      04-03-2012, 10:11 AM   #42
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Why can I not open this in adobe reader x or excel? Am I stoopid?
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      04-03-2012, 04:19 PM   #43
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Why can I not open this in adobe reader x or excel? Am I stoopid?
Save the file, right click the file, select "rename" and change the extension to .zip

Then unzip it and you will see an excel file inside.
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      04-06-2012, 08:47 AM   #44
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Thanks for this, very helpful.

I think it would be helpful to show a small graph shown underneath (similar to how volume or technical graphs are sometimes shown under stock price graphs) that shows RPM and maybe TPS (or something else), X-aligned with the main graph. This doesn't pollute the scales, and you don't need a high precision graph of RPM....

My 2 cents. Thanks again.
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