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      02-08-2014, 08:01 PM   #1
tennis_pr0
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COBB Datalogs

Hey guys, just got my 2010 335xi and installed the COBB AP yesterday.

I am running completely stock and have the stage 1 aggressive map installed (93 octane map).

The temp was 25 f out and I did two 3rd gear pulls. This link has both pulls in it.

Please tell me how they look, thanks.

http://www.datazap.me/u/tennispr0/co...3rd-gear?log=0
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      02-08-2014, 08:39 PM   #2
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      02-08-2014, 10:12 PM   #3
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have some over boosting hence throttle closers easy fix and all else looks good.
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      02-08-2014, 10:19 PM   #4
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Quote:
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have some over boosting hence throttle closers easy fix and all else looks good.
What do you mean and how do I fix this? I might have ever so slightly let off the throttle during the pull...
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      02-08-2014, 10:25 PM   #5
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After I hit 6500 rpm I let off the gas completely and shifted twice to get to fifth gear, then I stopped logging, is that what you are talking about?
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      02-08-2014, 11:29 PM   #6
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Guys should I use the 91 octane tune instead of the 93?
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      02-09-2014, 12:59 AM   #7
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Originally Posted by tennis_pr0 View Post
Guys should I use the 91 octane tune instead of the 93?
Logs look good to me. You have minor boost oscillations, but I think that's fairly normal. You seem to be hitting target, and have no timing corrections on either pull. Timing correction is the big indicator that your timing is too much for your octane. Your engine looks pretty healthy to me.
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      02-09-2014, 04:35 AM   #8
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Guys should I use the 91 octane tune instead of the 93?
Run whatever is the highest octane you can find. No reason at all to drop down to 91.

Congrats on the new car bud.
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      02-09-2014, 08:33 AM   #9
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Run whatever is the highest octane you can find. No reason at all to drop down to 91.

Congrats on the new car bud.
Thanks Pats, do my logs look good? I think the oscillations are because I ever so slightly let off the throttle during acceleration. I think I did this because I didn't want to hit the kickdown switch, so I was a little bit careful with the throttle once I pushed it all the way down.
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      02-09-2014, 08:58 AM   #10
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When I got the car, they filled it up with 91 octane. So I let it run dry and then refilled it with 93, however I probably had like one gallon of the 91 still left, so lets say I had 1 gallon of 91 and then like 13 gallons of 93, could this cause the oscillations?
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      02-09-2014, 10:21 AM   #11
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Quote:
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Thanks Pats, do my logs look good? I think the oscillations are because I ever so slightly let off the throttle during acceleration. I think I did this because I didn't want to hit the kickdown switch, so I was a little bit careful with the throttle once I pushed it all the way down.
Very sharp outside of the boost oscillations and throttle closures.

No 91 octane would not cause that.
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      02-09-2014, 10:29 AM   #12
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Log doesn't look good but is not too bad. It won't damage your car so relex.
Oscillations has nothing to do with your fuel or you letting off the throttle. It is because the map you are running is not meant for 25f temperature.
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      02-09-2014, 12:17 PM   #13
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Log doesn't look good but is not too bad. It won't damage your car so relex.
Oscillations has nothing to do with your fuel or you letting off the throttle. It is because the map you are running is not meant for 25f temperature.
So thats the reason because it was so cold out? It was actually more like 15-20 degrees
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      02-09-2014, 12:31 PM   #14
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How do i fix this what am i missing?
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      02-09-2014, 01:27 PM   #15
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You will need to become familiar with ATR and dial in the tune in order to fix this issue. I can walk you through fixing or, if you do not feel comfortable doing it yourself, shoot an email to sales@protuningfreaks.com and we will create a custom tailored map to your car and you will pick up some power while getting any issues resolved.
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      02-09-2014, 01:42 PM   #16
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The OP is overshooting Load and Boost target. Do not be alarmed by this it will not harm your car but it does needs to be cleaned up.

It seems you are not familiar with how to use ATR, so I would advise to get with Allen@PTF as suggested to get your tuning cleaned up

FWIW, it looks like the BLM table needs to be lowered and the WGDC Ceiling needs to be raised both on the back half. Easy fix without having to screw with the PITA WGDC base table
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      02-09-2014, 01:59 PM   #17
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I am nlt following with this really. I did not have this problem with my other car and had the same tune.

Could it be because of the cold weather? Is this sometjing i have to take care of or is it okay to just leave? Should i reinstall the accessport or change to a lower map, like sport map instead of aggressive map?
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      02-09-2014, 02:04 PM   #18
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Seems to me that running my stock car on a 91 octane tune (sport tune) would be safer and more reliable?
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      02-09-2014, 07:29 PM   #19
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Should I change to sport map or how do I fix this?
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      02-09-2014, 09:55 PM   #20
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      02-10-2014, 07:11 AM   #21
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The issue you are experiencing will not cause any damage to the engine. There isn't an issue with too aggressive of fuel for the map, the WG tables are just not optimized for your current conditions.
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      02-10-2014, 07:32 AM   #22
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Quote:
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The issue you are experiencing will not cause any damage to the engine. There isn't an issue with too aggressive of fuel for the map, the WG tables are just not optimized for your current conditions.
Should i use the sport map instead?
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