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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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      02-27-2012, 02:27 PM   #4027
Joshboody
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You may want to start a new thread and include additional logs if you are curious. IMO stage2 is very aggressive already and throwing in an uphill, 4th gear log it will be difficult to make it pretty looking. Everyone gets timing drops, canít be avoidedÖ but can be reduced. Both these guys have more efficient turbos, so their logs arenít going to be as aggressive looking.
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      02-27-2012, 02:28 PM   #4028
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Quote:
Originally Posted by skim7x View Post
Hm very interesting... I'll definitely have to try new gas... What gas do you guys get? Shell?

I have the new BMS catch can... That shouldn't have anything to do with this, right? If anything it would prevent blow-by and prevent the blow-by from reducing the octane...

*sigh* can't wait for meth...
if you do meth get a small nozzle and run 50/50 % you want better octane and suppress IAT , not fueling. Otherwise your trims will go so negative that you will end up probably missifire, with cobb fueling is there and perfect , its not a piggy.
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      02-27-2012, 02:32 PM   #4029
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Quote:
Originally Posted by Joshboody View Post
You may want to start a new thread and include additional logs if you are curious. IMO stage2 is very aggressive already and throwing in an uphill, 4th gear log it will be difficult to make it pretty looking. Everyone gets timing drops, canít be avoidedÖ but can be reduced. Both these guys have more efficient turbos, so their logs arenít going to be as aggressive looking.
My logs didn't look like that even on stock turbos.
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      02-27-2012, 02:48 PM   #4030
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Try some new gas. I did some 60-130 mph testing in Oct and ran these first two with shell 93 from one gas station. Then ran it again a couple weeks later with shell 93 from another gas station. As you can see, totally difference story.
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      02-27-2012, 03:23 PM   #4031
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Quote:
Originally Posted by Joshboody View Post
You may want to start a new thread and include additional logs if you are curious. IMO stage2 is very aggressive already and throwing in an uphill, 4th gear log it will be difficult to make it pretty looking. Everyone gets timing drops, canít be avoidedÖ but can be reduced. Both these guys have more efficient turbos, so their logs arenít going to be as aggressive looking.
Thanks. I'll go to sport map and also try different gas stations.

Quote:
Originally Posted by mithiral67 View Post
Try some new gas. I did some 60-130 mph testing in Oct and ran these first two with shell 93 from one gas station. Then ran it again a couple weeks later with shell 93 from another gas station. As you can see, totally difference story.
What map were you running there? Still Aggressive?

Thanks for all the help, everyone!~
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      02-27-2012, 03:29 PM   #4032
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stage 2+ FMIC aggressie
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      02-27-2012, 03:47 PM   #4033
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just switched to linear map. feels much better than stock throttle. better control.
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      02-27-2012, 04:17 PM   #4034
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Have a 08' 335xi auto, with 33k, installed cobb and I am running stage 1 aggressive v301. Updated my Cobb via usb to latest version. I am experiencing hesitation or feels like milliseconds of loss of power under full throttle even when fully warmed up. Usually from 4k rpm up, when Cobb tune is removed, hesitation goes away. Would new spark plugs solve this? Have owned car since 28k and never been changed. Thanks for any input.
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      02-27-2012, 04:20 PM   #4035
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Quote:
Originally Posted by Smokn944 View Post
Have a 08' 335xi auto, with 33k, installed cobb and I am running stage 1 aggressive v301. Updated my Cobb via usb to latest version. I am experiencing hesitation or feels like milliseconds of loss of power under full throttle even when fully warmed up. Usually from 4k rpm up, when Cobb tune is removed, hesitation goes away. Would new spark plugs solve this? Have owned car since 28k and never been changed. Thanks for any input.
Plugs are due. Should fix your issue.
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      02-27-2012, 06:01 PM   #4036
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Originally Posted by utfenix335i View Post
I was getting some sputtering when I was powering up. Thought it was having too much torque to the wheels (winter + summer RFTs = possible traction issues). Went on a spirited drive with my friends on Saturday night and got the CEL warning on my dash. Plugged the Cobb in and ran the code, came back telling me it was a misfire. Since my car has 44k miles on it, it's about time for me to do spark plugs on my car anyway. Just picked up 6 spark plugs from autohausaz.com for $86 shipped to MD.

Just ordered from there and got free shipping... $72 bux.
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      02-27-2012, 06:52 PM   #4037
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Quote:
Originally Posted by Smokn944
Have a 08' 335xi auto, with 33k, installed cobb and I am running stage 1 aggressive v301. Updated my Cobb via usb to latest version. I am experiencing hesitation or feels like milliseconds of loss of power under full throttle even when fully warmed up. Usually from 4k rpm up, when Cobb tune is removed, hesitation goes away. Would new spark plugs solve this? Have owned car since 28k and never been changed. Thanks for any input.
Can it be the surge most of us are experiencing!!! Are you getting a pause in power between 3k-4k rpm? Try 4th gear cruise at 2k then load the car up gradually, does it initially kik in then pause then kick again?

If so wait in line for the fix soon.
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      02-27-2012, 06:55 PM   #4038
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X2, ordered mine also for $72 shipped to MD. Going to see if it helps, $72 isn't going to hurt.
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      02-27-2012, 06:58 PM   #4039
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I don't have surge or a pause, its like its misfirring. Just not smooth power past 4k rpm. But no codes.
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      02-27-2012, 07:22 PM   #4040
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sounds like my mis-fires.
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      02-28-2012, 12:59 AM   #4041
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I'm thinking of getting the Cobb for my car, but I really wanted to not mess with my warranty so I thought about the less powerful BMW PPK too.

For the Cobb, is it really easy to uninstall? Let's say if for most of the month I want to drive around stock, but perhaps only a weekend or so I want to put the tune back on, can I do that? I figure that less frequent driving like that would be better for the car. Is there any detriment to installing and removing the cobb tune a few times a month if you want to stay stock for most of the time?
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      02-28-2012, 01:30 AM   #4042
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Quote:
Originally Posted by rondocap View Post
I'm thinking of getting the Cobb for my car, but I really wanted to not mess with my warranty so I thought about the less powerful BMW PPK too.

For the Cobb, is it really easy to uninstall? Let's say if for most of the month I want to drive around stock, but perhaps only a weekend or so I want to put the tune back on, can I do that? I figure that less frequent driving like that would be better for the car. Is there any detriment to installing and removing the cobb tune a few times a month if you want to stay stock for most of the time?
It is SUPER easy to install/uninstall the cobb accessport. All you do is plug the AP in and select install or uninstall.

However, there's no real need. There are different levels of power you can run. If you want just a mild bump in power during the week you can run "drive" or "sport" for moderate gains or "agressive" for the most power. You can also run map 0 for stock power without uninstalling the tune.
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      02-28-2012, 02:46 AM   #4043
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Will Cobb increase hp/tq for stage 1 in the future? Im running stage 1 aggressive 93 oct but got use to the power quick. I am desperate to run stage 2 but i can't because i don't have and won't be able to install dp's due to fact that i don't want to lose the warranty. For those people out there like me that can't go with dp's because we don't want our warranty to get voided but would like to have more power and are left with wanting more, are they working on something or will this be as good as it gets?
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      02-28-2012, 04:18 AM   #4044
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Stage 1+ but you need intercooler.
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      02-28-2012, 06:32 AM   #4045
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Quote:
Originally Posted by styles50 View Post
Will Cobb increase hp/tq for stage 1 in the future? Im running stage 1 aggressive 93 oct but got use to the power quick. I am desperate to run stage 2 but i can't because i don't have and won't be able to install dp's due to fact that i don't want to lose the warranty. For those people out there like me that can't go with dp's because we don't want our warranty to get voided but would like to have more power and are left with wanting more, are they working on something or will this be as good as it gets?
Theres not much difference between S1 and S2 (no fmic) other than .5 to 1 degree in advance = around 5-10whp more. S2 sport is weaker than S1 aggressive.
S2+FMIC is a different story and only for FBO guys.
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      02-28-2012, 12:10 PM   #4046
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Hopefully the new maps are released before the end of the week. Seems like a lot of us are having these misfires and hopefully the maps take care of it. If not, it may be time to take care of the carbon build up now that I'm at 45k miles.
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      02-28-2012, 02:51 PM   #4047
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Quote:
Originally Posted by skim7x View Post
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 dunno, those seem like pretty large timing corrections for just rising IATs. On stage 1 I've done pulls hitting 160F and it never dropped timing that many degrees. I'm assuming it happens at that point in 4th and not 3rd because engine load is higher (especially air resistance) at that point and peak power is there. Going uphill increases load further. Maybe you should call Cobb or PM Rob and ask what they think timing pulls could be caused by?
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      02-28-2012, 05:04 PM   #4048
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I dunno, those seem like pretty large timing corrections for just rising IATs. On stage 1 I've done pulls hitting 160F and it never dropped timing that many degrees. I'm assuming it happens at that point in 4th and not 3rd because engine load is higher (especially air resistance) at that point and peak power is there. Going uphill increases load further. Maybe you should call Cobb or PM Rob and ask what they think timing pulls could be caused by?
I e-mailed Rob with the raw datalog file and he got back to me very quickly. He said that the timing is likely caused by bad gas and he recommended I try a different gas station and use the Sport map in the mean time (says the ECU is protecting the engine well, but he likes to be cautious).

And since I'm already past 50k miles, he is recommending I get my intake valves cleaned because I probably have a lot of carbon build-up at this point... I'm going to look for a place to get it done... just a funny story, I called Bloomfield BMW last week about intake cleaning and the SA didn't know what I was talking about... he kept thinking I was talking about "Injection cleaning" and said that BMW recommends against it on our cars because of high pressure something something. Guess I'll have to call a different dealership lol...
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Last edited by skim7x; 02-28-2012 at 06:23 PM.
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