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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 > All COBB Tuning AccessPORT Flash for N54 335i Discussion Here



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      02-24-2012, 11:00 AM   #4005
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Are your turbo on their way out? Still under warranty?......(Pause)....Vishnu Single Turbo......? Haha
My turbos have been smoking and rattling for about 20,000 miles now. I'm just waiting to see what is on the market when they finally fail... but so far wgdc is perfect and no problems making boost. So it's just an annoyance thing at this point.
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      02-24-2012, 02:54 PM   #4006
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My turbos have been smoking and rattling for about 20,000 miles now. I'm just waiting to see what is on the market when they finally fail... but so far wgdc is perfect and no problems making boost. So it's just an annoyance thing at this point.
How many miles do you have on your car?
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      02-24-2012, 06:12 PM   #4007
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I don't understand this surging stuff, none of the public maps ever surged. They all run great on my car... Never even had throttle closure.
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      02-24-2012, 06:34 PM   #4008
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Originally Posted by Zasquatch View Post
This graph isn't very good... You should isolate 3rd gear and remove RPM so the scales are a bit better. Also move IAT over to your secondary y-axis.

I've had this problem since September... I'm itching for the fix!
I didn't graph it, someone did it for me. That was the first log I took of about 5 and by the last couple the throttle closures went away as the waste gate DC adjusted. Now my copy of windows office expired so i can't even look at csv's. I don't notice the surge as much on the ST map, but haven't tried the linear map since it came out in beta and don't know if they made any improvements on it since then.
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      02-25-2012, 11:02 PM   #4009
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Had a chance to do some data logging on my car a couple nights ago... unfortunately, this run was on an uphill segment with a consistent right curve. How does it look? I'm new with looking at these and not sure how the timing corrections look... and how the requested load vs actual load looks... any comments would be great, thanks!



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      02-25-2012, 11:51 PM   #4010
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The logs look pretty good. I'm going to assume the timing corrections in 4th gear are related to IATs and aren't that bad.
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      02-25-2012, 11:57 PM   #4011
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The logs look pretty good. I'm going to assume the timing corrections in 4th gear are related to IATs and aren't that bad.
Yeah... I thought it was weird that there was so much timing correction going on in 4th gear... but wasn't sure what was going on...
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      02-25-2012, 11:58 PM   #4012
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Hey guys, i am sure you have seen this, but if you haven't, check this out. If you are getting misfires, COBB has put out DIY misfire diagnostic. i would do this before you change out your spark plugs. it maybe a coil.

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      02-26-2012, 12:14 AM   #4013
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Yeah... I thought it was weird that there was so much timing correction going on in 4th gear... but wasn't sure what was going on...
I can't say for sure it's IAT related, but i'd say it's likely. I haven't hit 100F IATs since i started running stage 2+, but on stage 1 whenever my IATs went over 90F i tended to get timing pulls. Since your timing on #1 only pulled to 5* and then started climbing steadily again it really isn't bad. When it starts pulling, adding and then pulling ris when you may have an issue.
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      02-26-2012, 01:44 AM   #4014
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Definitely a difference is boost targeting speed btween stage1 sport and agg... Agg is slower and doesn't hold boost as well during a shift. I'd love to know the difference in mapping?
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      02-26-2012, 02:58 AM   #4015
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Quote:
Originally Posted by skim7x View Post
Had a chance to do some data logging on my car a couple nights ago... unfortunately, this run was on an uphill segment with a consistent right curve. How does it look? I'm new with looking at these and not sure how the timing corrections look... and how the requested load vs actual load looks... any comments would be great, thanks!



What was used to graph this?
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      02-26-2012, 03:03 AM   #4016
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Microsoft Excel :P
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      02-26-2012, 06:59 AM   #4017
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use this site for easy graphing FYI

http://www.javalotte.com/csvgraph/
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      02-27-2012, 07:25 AM   #4018
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Microsoft Excel :P
try the sport map, what octane were you on during the logs, i must say they look worse than min (timing)...
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      02-27-2012, 07:53 AM   #4019
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you can also Virtual Dyno to graph, much much easier....
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      02-27-2012, 08:39 AM   #4020
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you can also Virtual Dyno to graph, much much easier....
Finally just gave it a try... pretty cool.
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      02-27-2012, 11:06 AM   #4021
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I was running aggressive map on Exxon 93 octane. What could cause my timing to be so 'bad'... And what constitutes 'bad' timing, anyways? Just the degree of timing correction? Thanks!
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      02-27-2012, 11:07 AM   #4022
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Ok I'll try that next time...

Enrita, any input on my timing? I know you've had a lot of experience with Cobb... Thanks!
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      02-27-2012, 11:26 AM   #4023
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Try the sport map on the same gas. Seems its too aggressive as it pulls basically timings on all cylinders. Spurk plugs are new?
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      02-27-2012, 11:36 AM   #4024
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Quote:
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Try the sport map on the same gas. Seems its too aggressive as it pulls basically timings on all cylinders. Spurk plugs are new?
Thanks for the reply. The spark plugs have about 10,000 miles on them now.

How much timing should I expect?
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      02-27-2012, 11:55 AM   #4025
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When you shift into 3rd gear the car is not happy with the multiple timing corrections. Try dropping to the sport map temporarily
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      02-27-2012, 12:54 PM   #4026
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You mean when i shift into 4th, right? Looks like not much timing correction in third... I'll go down to stg2+fmic sport and try to do some logs soon...

Is this a tuning problem or hardware problem? Or no way to tell?
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