First a thank you, then a quick COBB question...

S6F · 01-11-2015, 10:44 AM

Thanks to those who responded to my issue with insbility to uninstall Cobb in prep for a dealer visit. Your advice worked perfectly. Now the question: My 335is running stage1 sport showed a max boost of 14.6psi. How might that compare with stock? Appreciate your replies.

SteveF

LGCubana · 01-11-2015, 12:00 PM

wouldn't your AP allow you to meter your boost, after flashing back to stock ?

TheYuriPanda · 01-11-2015, 12:23 PM

Stock boost is around 7-8 psi. I think. Don't quote me on that lol.

firemanjust1 · 01-11-2015, 01:53 PM

Stock boost on n54 is 8 psi .

135Pats · 01-11-2015, 01:58 PM

Peak boost isn't what you should focus on here, it's all down low and well within the compressor's efficiency. Look at the taper up top, that's what is protecting your turbos, but is also a root cause behind the car falling on its' face north of 4K revs.

What do you do about it? Now that's a good question

But yes, stock N54s make around 8-9 pounds down low, I don't recall what the taper looks like.

Mike@N54Tuning.com · 01-11-2015, 02:17 PM

Quote:

Originally Posted by TheYuriPanda

Stock boost is around 7-8 psi. I think. Don't quote me on that lol.

+1

Don't forget the overboost feature on the IS will raise that for a short time.

Mike

RSL · 01-11-2015, 03:00 PM

Peak overboost on the IS seems to range 11-14psi depending on the cars/conditions and it's shut off around 4500-5000RPM. Mine peaked about 12psi IIRC, and no, you can't log on AP with the OEM bin (overboost logic) loaded.

01-11-2015, 10:44 AM	#1
S6F First Lieutenant 95 Rep 335 Posts Drives: '19 540ixMsport Join Date: Aug 2010 Location: Central NJ iTrader: (1)	First a thank you, then a quick COBB question... Thanks to those who responded to my issue with insbility to uninstall Cobb in prep for a dealer visit. Your advice worked perfectly. Now the question: My 335is running stage1 sport showed a max boost of 14.6psi. How might that compare with stock? Appreciate your replies. SteveF
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01-11-2015, 12:23 PM	#3
TheYuriPanda First Lieutenant 74 Rep 390 Posts Drives: 335i XDrive E90 2010 Join Date: Aug 2014 Location: Colorado iTrader: (0)	Stock boost is around 7-8 psi. I think. Don't quote me on that lol. __________________ My Build Thread: http://www.e90post.com/forums/showth...8#post16918878
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01-11-2015, 01:53 PM	#4
firemanjust1 Second Lieutenant 32 Rep 208 Posts Drives: Audi S3/03 350z Join Date: Dec 2013 Location: buffalo ny iTrader: (0)	Stock boost on n54 is 8 psi .
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01-11-2015, 01:58 PM	#5
135Pats Major General 456 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	Peak boost isn't what you should focus on here, it's all down low and well within the compressor's efficiency. Look at the taper up top, that's what is protecting your turbos, but is also a root cause behind the car falling on its' face north of 4K revs. What do you do about it? Now that's a good question But yes, stock N54s make around 8-9 pounds down low, I don't recall what the taper looks like. __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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01-11-2015, 03:00 PM	#7
RSL Captain 648 Rep 779 Posts Drives: E92 ///M3 (Retired) / 335is Join Date: Mar 2012 Location: USA iTrader: (6)	Peak overboost on the IS seems to range 11-14psi depending on the cars/conditions and it's shut off around 4500-5000RPM. Mine peaked about 12psi IIRC, and no, you can't log on AP with the OEM bin (overboost logic) loaded.
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