Lots of boost!

Amizzi · 05-22-2016, 02:00 AM

Hi guys,

Kinda new to boosted cars so please be patient with me LOL.
Tonight was a kinda cooler night here in Ontario and perfect to go for a drive.
My buddy did the same and we took our cars to some local winding roads.

My questions is this, both cars are almost identical even bolt on wise with the exception of mine is being a e90 n54 xi with catback exhaust and my friends is the same but the i with oem exhast.
We got to an area and lined up the cars using Map 1 on a jb4, to my surprise I absolutely ripped the doors of him...
We tried a second time and the same thing I left him way behind!!!

I kept an eye on my gauge cluster for rpm, boost etc and couldn't help notice I hit boost in the 15-20 psi mark!!!!!

I've looked it up to double check but of course as many of you know already the boost should be around 14 psi, checked the logged info and it actually went as high as 18.1 psi!!!!

Is that typically normal or do i need to start looking deeper into this?
Thanks,
Adrian

Cory S · 05-22-2016, 08:35 AM

Enjoy it!

N54Angel · 05-22-2016, 10:40 AM

Colder weather makes you hit higher boost

924er · 05-22-2016, 11:13 AM

Jb4 ftw!!

BMWs target load not boost so it can fluctuate depending on various factors.

I do think the gauge hack is ghetto tho lol

Amizzi · 05-22-2016, 12:07 PM

Thanks guys!
May have been the cooler air, car was pulling like a monster last night!
I really even noticed the huge difference without even having to look at any gauges or what was logged.
Peak boost was at about 4300rpm, man oh man was she going!!!
My buddy thought I was lying, he said to me there's not way and that I had something else done. Like I stated though, just had the cat back SPORT exhaust over him and that's all really.
This really doesn't explain thought in regards to my friends car, conditions were the same for both vehicles ...
Today is a fairly warm day, going to give her another go and see if I can replicate.

Amizzi · 05-22-2016, 12:09 PM

Quote:

Originally Posted by Cory S

Enjoy it!

Oh I was enjoying it LOL!
Had a C5 Vette try and pull along side us and he didn't stand a chance!
He eventually backed off when taken by an E90 with 2 cars seats in the back

.

stanlalee · 05-22-2016, 12:56 PM

Are you both on the latest firmware? They recently upped the boost on map 1 and 2 to be more in line with the competition.

05-22-2016, 02:00 AM	#1
Amizzi Private 22 Rep 99 Posts Drives: 2007 BMW 335xi Join Date: Jun 2015 Location: Woodbridge Ont iTrader: (0)	Lots of boost! Hi guys, Kinda new to boosted cars so please be patient with me LOL. Tonight was a kinda cooler night here in Ontario and perfect to go for a drive. My buddy did the same and we took our cars to some local winding roads. My questions is this, both cars are almost identical even bolt on wise with the exception of mine is being a e90 n54 xi with catback exhaust and my friends is the same but the i with oem exhast. We got to an area and lined up the cars using Map 1 on a jb4, to my surprise I absolutely ripped the doors of him... We tried a second time and the same thing I left him way behind!!! I kept an eye on my gauge cluster for rpm, boost etc and couldn't help notice I hit boost in the 15-20 psi mark!!!!! I've looked it up to double check but of course as many of you know already the boost should be around 14 psi, checked the logged info and it actually went as high as 18.1 psi!!!! Is that typically normal or do i need to start looking deeper into this? Thanks, Adrian Last edited by Amizzi; 05-22-2016 at 10:00 AM..
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05-22-2016, 08:35 AM	#2
Cory S Major 305 Rep 1,163 Posts Drives: 2011 335i-X Join Date: Oct 2015 Location: N.H. iTrader: (0)	Enjoy it!
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05-22-2016, 10:40 AM	#3
N54Angel Second Lieutenant 42 Rep 281 Posts Drives: 2008 BMW 335XI Join Date: Apr 2016 Location: Colorado iTrader: (0)	Colder weather makes you hit higher boost
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05-22-2016, 11:13 AM	#4
924er Colonel 352 Rep 2,050 Posts Drives: e92 335i '10 Join Date: Feb 2014 Location: Socal iTrader: (0)	Jb4 ftw!! BMWs target load not boost so it can fluctuate depending on various factors. I do think the gauge hack is ghetto tho lol __________________ '10 e92 N54 DCI intakes, ER chargepipe, TIAL BOV, VRSF 5in FMIC, BMS Downpipes COBB e30
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05-22-2016, 12:07 PM	#5
Amizzi Private 22 Rep 99 Posts Drives: 2007 BMW 335xi Join Date: Jun 2015 Location: Woodbridge Ont iTrader: (0)	Thanks guys! May have been the cooler air, car was pulling like a monster last night! I really even noticed the huge difference without even having to look at any gauges or what was logged. Peak boost was at about 4300rpm, man oh man was she going!!! My buddy thought I was lying, he said to me there's not way and that I had something else done. Like I stated though, just had the cat back SPORT exhaust over him and that's all really. This really doesn't explain thought in regards to my friends car, conditions were the same for both vehicles ... Today is a fairly warm day, going to give her another go and see if I can replicate.
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05-22-2016, 12:56 PM	#7
stanlalee Major 261 Rep 1,093 Posts Drives: 07' E92 335i manual Join Date: Oct 2013 Location: Newport News, Va iTrader: (0)	Are you both on the latest firmware? They recently upped the boost on map 1 and 2 to be more in line with the competition.
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