N54Tech.com - International Turbo Racing Discussion
(#1)
Old
fryj00's Avatar
fryj00 fryj00 is offline
Junior Member
 
Posts: 289
Join Date: Oct 2014
Car: 2011 e92 n55 xDrive 6MT
Default Summary of N55 backend flash options - 03-24-2015, 11:13 AM

Hi, Terry, I am a little cloudy on what possibilities are available for flashes that you have developed for the N55 platform. The only one that I can repeatedly find is the "big turbo" flash but I think I recall reading posts about E85 flashes or flashes for auto trans, etc. Would you mind summarizing briefly what flashes are available? Maybe a sticky on the subject?

Thanks for your time and I love what you do for this community. You guys rock!

-Bryan



2011 E92 N55 xDrive 6MT
VTT Stage 1 | DV+ | Pure inlet | MHD/JB4
Stage 2 lpfp | BMS Intake | Shifteck 4-inch "expansion chamber" | MXP catback
VRSF 7" FMIC | ECS 2-piece rotors
255/40-18 square | 8.5x18 ET35
Fortune Auto MSC-1 coilovers 8k/10k
Reply With Quote
(#2)
Old
BostonBeemah's Avatar
BostonBeemah BostonBeemah is offline
Senior Member
 
Posts: 831
Join Date: Sep 2011
Car: AW 135i
Default 03-24-2015, 12:03 PM

Pretty sure the n55 backend is obsolete for stock turbo cars regardless if e85 is used or not because of the minimal to no gains.


2010 AW/BLK 135i VM 6465 Single Turbo, JB4 + MHD, VRSF CP & Tial, Big Tom, Fuel-It PI + Stage 3 + Return + Ethanol Sensor, BMW PE, MFactory LSD & Axles, Spec 3+ & MFactory SMFW, RB External PCV
Best stock turbo 12.5 @ 19.46 spinning all the way down
RIP 2008 AW/BL 135i
Reply With Quote
(#3)
Old
fryj00's Avatar
fryj00 fryj00 is offline
Junior Member
 
Posts: 289
Join Date: Oct 2014
Car: 2011 e92 n55 xDrive 6MT
Default 03-24-2015, 12:15 PM

Yeah, I think I knew that (generally) but I was kinda hoping that there might be some drivability improvements to be had. For instance, with ~E40 my car idles rough or even dies when cold. My throttle response on decel (rev matching) is total **** for some reason. I was hoping that a flash could help improve response in general...not just looking for peak power. I am also researching a move to stage 2.

Was just hoping to see a collection of relevant info on the subject in one place.

Thanks



2011 E92 N55 xDrive 6MT
VTT Stage 1 | DV+ | Pure inlet | MHD/JB4
Stage 2 lpfp | BMS Intake | Shifteck 4-inch "expansion chamber" | MXP catback
VRSF 7" FMIC | ECS 2-piece rotors
255/40-18 square | 8.5x18 ET35
Fortune Auto MSC-1 coilovers 8k/10k
Reply With Quote
(#4)
Old
Nugs Nugs is offline
Junior Member
 
Posts: 392
Join Date: Apr 2013
Car: 2011 135i
Default 03-24-2015, 06:32 PM

The standard flashes in this thread
http://www.n54tech.com/forums/showthread.php?t=24788
should be fine for stock turbo as well.

It may not add much performance but I found drivability much improved and gearbox shifts much better than JB4 only.
Reply With Quote
(#5)
Old
durty sexn55 durty sexn55 is offline
Junior Member
 
Posts: 107
Join Date: Jan 2014
Car: n55
Default 03-24-2015, 07:05 PM

I'm fbo on my n55 and I'm going to install the stage 2 fuel pump and my meth kit this weekend and do my bef after that
Reply With Quote
(#6)
Old
fryj00's Avatar
fryj00 fryj00 is offline
Junior Member
 
Posts: 289
Join Date: Oct 2014
Car: 2011 e92 n55 xDrive 6MT
Default 03-24-2015, 07:20 PM

Quote:
Originally Posted by Nugs
It may not add much performance but I found drivability much improved and gearbox shifts much better than JB4 only.
Now that's what I'm talking about. I'd love it if my xdrive had the response of an M4...naaaaaasty.



2011 E92 N55 xDrive 6MT
VTT Stage 1 | DV+ | Pure inlet | MHD/JB4
Stage 2 lpfp | BMS Intake | Shifteck 4-inch "expansion chamber" | MXP catback
VRSF 7" FMIC | ECS 2-piece rotors
255/40-18 square | 8.5x18 ET35
Fortune Auto MSC-1 coilovers 8k/10k
Reply With Quote
(#7)
Old
durty sexn55 durty sexn55 is offline
Junior Member
 
Posts: 107
Join Date: Jan 2014
Car: n55
Default 03-24-2015, 08:41 PM

Any body know if wedge have a bef for the n55
Reply With Quote
(#8)
Old
loesch's Avatar
loesch loesch is offline
Senior Member
 
Posts: 512
Join Date: Apr 2012
Car: 2011 BMW 135i M Sport
Default 03-25-2015, 01:16 PM

I like the idea of this thread. BMS did create a basic BEF for when he was testing the VTT Stage 2 turbo but there haven't been any public variants or updates since then. I'm sure some people have been working on tweaking this to increase throttle response or maybe even improve exhaust note. Would be great to hear from some of these people, if they exist.
Reply With Quote
(#9)
Old
tboudre's Avatar
tboudre tboudre is offline
Junior Member
 
Posts: 262
Join Date: Jan 2014
Car: 2011 BMW 335xi E90 N55
Default 03-25-2015, 02:10 PM

I'm not planning a turbo upgrade, but I always read that there is no benefit to the backend flash for stock N55 turbos. I'm curious as to some of the details. I am also wondering if anyone has had any problems or if there are potential problems with running high E% without a backend flash. I have run up to E70 in mine with no apparent problems. I guess the biggest issue would be not getting enough fuel and running lean? How can we tell if we have a problem if the N55 JB4 does not log LT & ST trims?


2011 335i xDrive ///M-Sport LeMans Blue Navigation iDrive 15% Tint N55 E90 - BMS Intake, Le Mans Blue Grilles, Le Mans Blue Rear Diffuser, Alpina B3 TCU Flash, Misc Coding, Matte Black Badge, Gloss Black Exhaust Tips, Blue Calipers*, VRSF Charge Pipe*, Cyba Scoops*, JB4 ISO 5.5, Sport Oil Cooler Valve, FlexFuel (Fuel Rail Pressure) Wires, Wheel Lock Set, Ethanol Content Sensor - No problems up to E70 fuel mix
* Painted 7251 Cobalt Blue Metallic - Matches LeMans Blue
Reply With Quote
(#10)
Old
Nugs Nugs is offline
Junior Member
 
Posts: 392
Join Date: Apr 2013
Car: 2011 135i
Default 03-25-2015, 05:57 PM

Quote:
Originally Posted by loesch
I like the idea of this thread. BMS did create a basic BEF for when he was testing the VTT Stage 2 turbo but there haven't been any public variants or updates since then. I'm sure some people have been working on tweaking this to increase throttle response or maybe even improve exhaust note. Would be great to hear from some of these people, if they exist.
Terry has done a few different revisions for people but not released publicly as the ones in the thread should be good for the majority.
I asked PTF if they would do one for me and Dzenno said he wouldn't because you can't monitor timing on all cylinders with the JB4. If that changed then he would.
Reply With Quote
(#11)
Old
Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
Tuner
 
Posts: 28,177
Join Date: Jan 2008
Default 03-25-2015, 07:37 PM

Quote:
Originally Posted by fryj00
Hi, Terry, I am a little cloudy on what possibilities are available for flashes that you have developed for the N55 platform. The only one that I can repeatedly find is the "big turbo" flash but I think I recall reading posts about E85 flashes or flashes for auto trans, etc. Would you mind summarizing briefly what flashes are available? Maybe a sticky on the subject?

Thanks for your time and I love what you do for this community. You guys rock!

-Bryan
We make one for larger than OEM turbos. There is no reason for a back end flash for OEM turbos. See previous testing.

http://www.n54tech.com/forums/showthread.php?t=22563


Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#12)
Old
fryj00's Avatar
fryj00 fryj00 is offline
Junior Member
 
Posts: 289
Join Date: Oct 2014
Car: 2011 e92 n55 xDrive 6MT
Default 03-25-2015, 08:09 PM

Well nevermind then. I guess I had the impression that there was more to be said but it looks like it's already been said.

Still rock.



2011 E92 N55 xDrive 6MT
VTT Stage 1 | DV+ | Pure inlet | MHD/JB4
Stage 2 lpfp | BMS Intake | Shifteck 4-inch "expansion chamber" | MXP catback
VRSF 7" FMIC | ECS 2-piece rotors
255/40-18 square | 8.5x18 ET35
Fortune Auto MSC-1 coilovers 8k/10k
Reply With Quote
(#13)
Old
fryj00's Avatar
fryj00 fryj00 is offline
Junior Member
 
Posts: 289
Join Date: Oct 2014
Car: 2011 e92 n55 xDrive 6MT
Default 04-02-2015, 11:43 AM

Has anyone built their own N55 map and would like to share fueling settings? High-load AFR, scalar, etc...?

E40, FBO, stock turbo.



2011 E92 N55 xDrive 6MT
VTT Stage 1 | DV+ | Pure inlet | MHD/JB4
Stage 2 lpfp | BMS Intake | Shifteck 4-inch "expansion chamber" | MXP catback
VRSF 7" FMIC | ECS 2-piece rotors
255/40-18 square | 8.5x18 ET35
Fortune Auto MSC-1 coilovers 8k/10k
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2018, N54tech.com