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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 > Boost seems low at 6,500 for cobb stage 2 + fmic!



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      01-25-2012, 02:22 AM   #1
Streetsweeper360
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Boost seems low at 6,500 for cobb stage 2 + fmic!

Did some live dataloging tonight with my stage 2 + fmic map and the boost peaks 18 or so but at redline it's at 8.8 .to 9.1 is his right ?? It seems low boost for redline after seeing 18 peak in the mid range .please need insight !My buddy told me to me that his jb4 holds 13 at redline .Why is the Cobb doing his don't seem normal or might it be?? Very confused .Thanks
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      01-25-2012, 02:25 AM   #2
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is this the guy with the multiple personality?

if so
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      01-25-2012, 02:36 AM   #3
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Quote:
Originally Posted by RaihaX View Post
is this the guy with the multiple personality?

if so
No !! I'm not that sauce dude ! Omg lay off of it,mr 5 cleared it uP already.Thanks.
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      01-25-2012, 02:52 AM   #4
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boost doesn't get reported accuratley after a certain rpm. Its running more boost than 8 psi at redline
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      01-25-2012, 02:59 AM   #5
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Quote:
Originally Posted by 805beemer View Post
boost doesn't get reported accuratley after a certain rpm. Its running more boost than 8 psi at redline
Thought they fixed this problem with the new firmware ?
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      01-25-2012, 07:57 AM   #6
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??
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      01-25-2012, 09:04 AM   #7
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They didn't fix it on all rom versions.
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E90 LCI N54 6AT
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      01-25-2012, 09:06 AM   #8
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???
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      01-25-2012, 09:41 AM   #9
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Quote:
Originally Posted by Streetsweeper360 View Post
No !! I'm not that sauce dude ! Omg lay off of it,mr 5 cleared it uP already.Thanks.
Would love to see a picture of your car. Must be beast with Cobb Stage 2+.
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      01-25-2012, 10:50 AM   #10
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      01-25-2012, 10:55 AM   #11
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lol
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      01-25-2012, 11:10 AM   #12
messi
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Quote:
Originally Posted by RnmEvo9 View Post

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      01-25-2012, 11:18 AM   #13
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Did you update to the latest firmware?

Did you datalog properly?

Without the datalog we can't really say much.
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      01-25-2012, 12:28 PM   #14
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Quote:
Originally Posted by Brey335i View Post
Did you update to the latest firmware?

Did you datalog properly?

Without the datalog we can't really say much.
That's the weird part ,when I bought the Cobb a few weeks ago i did the fitem ware update . I hooked it back up last night and it said update , I redid the update . Should I reflash it?? How much boost are holding up top??
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      01-25-2012, 12:40 PM   #15
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After updating the firmware reset the ecu then uninstall and re-install the AP. I know it's not "necessary" but it has solved odd issues in the past.
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      01-25-2012, 01:49 PM   #16
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Do a complete uninstall and install it again. Unless you're hitting 22 psi at 6500 something is wrong.
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      01-25-2012, 02:13 PM   #17
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Quote:
Originally Posted by Brey335i View Post
Do a complete uninstall and install it again. Unless you're hitting 22 psi at 6500 something is wrong.

Cobb told me no need for uninstalling it.They told me reflash it and I'm good .brey how much boost are you holding till
6,500??
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      01-25-2012, 04:03 PM   #18
RnmEvo9
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I see about 13.0-13.5psi from my p3 boost gauge around 6500rpms just to give you an idea StreetSweeper360.
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      01-25-2012, 04:41 PM   #19
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Quote:
Originally Posted by RnmEvo9 View Post
I see about 13.0-13.5psi from my p3 boost gauge around 6500rpms just to give you an idea StreetSweeper360.
What tune you running ?
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      01-25-2012, 04:45 PM   #20
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Cobb Stage 2+FMIC stock throttle
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      01-25-2012, 06:13 PM   #21
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Quote:
Originally Posted by RnmEvo9 View Post
Cobb Stage 2+FMIC stock throttle
Read your threads and you have a jb4 ?
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      01-25-2012, 06:48 PM   #22
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Quote:
Originally Posted by Streetsweeper360 View Post
Read your threads and you have a jb4 ?
Can't take my word for it? Ok how about this...

Name:  cobb.jpg
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