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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 > Can someone take a look at these logs?



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      05-09-2012, 04:39 AM   #1
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Can someone take a look at these logs?

I did two logs in second gear from about 2500 RPMs to around 6500RPMs. Im running COBB stage 2+FMIC aggressive 93 oct. with stock throttle. Can someone possibly graph these and tell me what they look like? I dont know what any of these data logs are telling me. I did send them to COBB but thought Id also get some info from the forum members.

EDIT. Well its not letting me attach CSV files. Says they are invalid. How do I attach these logs? Thanks for everyones help.
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      05-09-2012, 04:52 AM   #2
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install Virtual dyno you can than graph them.
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      05-09-2012, 05:03 AM   #3
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Quote:
Originally Posted by enrita View Post
install Virtual dyno you can than graph them.
I googled Virtual Dyno and there are a few different ones. Can you suggest the one I should use?
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      05-09-2012, 05:22 AM   #4
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Ok heres all I could come up with.
Attached Files
File Type: txt datalog2excel.txt (16.6 KB, 51 views)
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      05-09-2012, 05:36 AM   #5
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Ok Ive never used or posted these graphs before so lets see if it works. Let me know how the car is running.

Ok the graph didnt fully show everything needed. I apologize. I dont know how to get this done correctly lol
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      05-09-2012, 05:53 AM   #6
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You have to zip them before uploading raw csv files.
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      05-09-2012, 06:45 AM   #7
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You have to label the curves, otherwise we have no idea what were looking at.
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      05-09-2012, 07:13 AM   #8
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if you have Excel download my grapher. 3 clicks and you have a nice tidy graph...
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      05-09-2012, 08:49 AM   #9
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Quote:
Originally Posted by Tzu View Post
You have to label the curves, otherwise we have no idea what were looking at.
YA WHEN I SAVED THE GRAPH IT HAD THE LABELS NOW THEY ARENT ON THE ATTACHMENT. ILL TRY AGAIN LATER ON.
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      05-09-2012, 09:12 AM   #10
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Send a message via AIM to themyst
You need to do the logs in 3rd shifting to 4th for the feedback to be of any use.
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      05-09-2012, 11:19 AM   #11
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Quote:
Originally Posted by woptang22 View Post
I googled Virtual Dyno and there are a few different ones. Can you suggest the one I should use?
http://www.bradbarnhill.com/projects/VirtualDyno/
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      05-09-2012, 12:44 PM   #12
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Just paste the content of the CSV file into here: http://www.javalotte.com/csvgraph/ and post the image.

EDIT: Make Time X axis.
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      05-09-2012, 07:24 PM   #13
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Quote:
Originally Posted by themyst View Post
You need to do the logs in 3rd shifting to 4th for the feedback to be of any use.
Oh Im didnt know that. THe guys from COBB told me to just do a third gear pull. Maybe I should shift into fourth and log again.
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      05-09-2012, 07:34 PM   #14
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Quote:
Originally Posted by rader1 View Post
This link is the one I used for the graph above. When I graphed it, all the parameters were off to the left of the graph. But when I save it to my computer and attach it to this site, all the parameters are gone. All is left is he graph with different colors and no descriptions. WHat am I doing wrong?
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      05-09-2012, 07:45 PM   #15
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Quote:
Originally Posted by woptang22 View Post
This link is the one I used for the graph above. When I graphed it, all the parameters were off to the left of the graph. But when I save it to my computer and attach it to this site, all the parameters are gone. All is left is he graph with different colors and no descriptions. WHat am I doing wrong?
Virtual Dyno is great, but I'm telling you, if your only objective is to make a chart for others to look at, just paste the contents of your CSV into the web link I posted above. Select Time as the X axis, most or all of the stuff on the y axis, and you'll get a postable image.
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      05-09-2012, 07:51 PM   #16
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Quote:
Originally Posted by phazen23 View Post
Virtual Dyno is great, but I'm telling you, if your only objective is to make a chart for others to look at, just paste the contents of your CSV into the web link I posted above. Select Time as the X axis, most or all of the stuff on the y axis, and you'll get a postable image.
The link you posted is actually the one Im trying to use now. LOL Ive pasted my log into wordpad like it says. Then paste it into the box in the link you provided, then I hit graph and nothing happens. No graph no nothing. So I start over and hit graph before I paste and it allows me to select x or y axis. I choose x and then it doesnt allow me to paste my log. Im not sure whats going on.
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      05-09-2012, 08:00 PM   #17
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Quote:
Originally Posted by woptang22 View Post
The link you posted is actually the one Im trying to use now. LOL Ive pasted my log into wordpad like it says. Then paste it into the box in the link you provided, then I hit graph and nothing happens. No graph no nothing. So I start over and hit graph before I paste and it allows me to select x or y axis. I choose x and then it doesnt allow me to paste my log. Im not sure whats going on.
Which log. The one you posted, or your CSV? The txt file you posted isn't in CSV format.

1) Open your CSV using notepad, not wordpad.
2) select all, copy to clipboard
3) visit link
4) empty clipboard into the little box, click graph
5) you'll see two columns and all your option. under the column "X-axis", select Time. Under the "Y-axis" column, select all of the checkboxes
6) Click OK, an image with a black background will appear underneath the box you pasted your data into.
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      05-09-2012, 08:10 PM   #18
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Here you go, I reformatted your data and plugged it in. Getting an image out of it was harder than I remember though *shrugs*
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      05-09-2012, 08:42 PM   #19
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Quote:
Originally Posted by phazen23 View Post
Here you go, I reformatted your data and plugged it in. Getting an image out of it was harder than I remember though *shrugs*
Thank you very much for graphing that for me. I really appreciate it. Now if someone can tell me what all this means? lol
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      05-09-2012, 09:22 PM   #20
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Quote:
Originally Posted by woptang22 View Post
Thank you very much for graphing that for me. I really appreciate it. Now if someone can tell me what all this means? lol
Unfortunately, I'm still learning how to differentiate a good run versus a bad one, but I see:

a) only one gear being logged. Ideally 2 or more are preferred, I think 3rd and 4th are the favorites, though it can be difficult since you're going pretty fast at the end of 4th.
b) no timing corrections, which is good. Timing corrections happen when your tune is too aggressive or your gas is too crappy.
c) inlet air temperature looks good
d) some minor throttle closures at the beginning. Was your DSC on? DSC is usually the culprit, so its recommended to turn it off while you do data logs.

FYI, I also didn't turn on all the options you logged. Someone please chime in if they need something I deselected.
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      05-10-2012, 04:42 AM   #21
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Thanks alot for your help on this thread. I greatly appreciate it. I wanted to do some logs because Ive only been using stage 2+FMIC for a few weeks and wanted to make sure everything is working properly. Im glad to hear things that you noticed are pretty good. And I had the DSC off. Maybe I was somehow feathering the throttle for some reason lol. But thats kind of another reason I did some logs. When I get of the gas hard, it seems as if the car "stutters" through the rpms a bit. Nothing totally major. But it just feels as if there isnt a smooth delivery. Just a bit choppy as the rmps go higher.

Quote:
Originally Posted by phazen23 View Post
Unfortunately, I'm still learning how to differentiate a good run versus a bad one, but I see:

a) only one gear being logged. Ideally 2 or more are preferred, I think 3rd and 4th are the favorites, though it can be difficult since you're going pretty fast at the end of 4th.
b) no timing corrections, which is good. Timing corrections happen when your tune is too aggressive or your gas is too crappy.
c) inlet air temperature looks good
d) some minor throttle closures at the beginning. Was your DSC on? DSC is usually the culprit, so its recommended to turn it off while you do data logs.

FYI, I also didn't turn on all the options you logged. Someone please chime in if they need something I deselected.
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      05-10-2012, 04:55 AM   #22
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timing not being pull on cylinder 1 does not mean all cylinders are happy. Cyl 1 is normally the happiest of them all.
I would log always 1-2-5 at least. Best is all of them.
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