N54Tech.com - Your Source for International Turbo BMW Racing Discussion
(#3426)
Old
JazRedGT JazRedGT is offline
Junior Member
 
Posts: 241
Join Date: Jul 2015
Car: 2007 335i E-92 6AT
Default 09-01-2017, 11:55 PM

Not anymore. Terry disabled the auto clear feature. Legal issues.


2007 AW 335i E-92 6AT MMP Stage 3 @ 24psi / JB4 G5 ISO / XHP STG3 / VRSF ** / MMP INLETS&OUTLETS / MHD E85 BACKEND / CW EXHAUST / CPe CP / GReddy RS BOV / BMS METH KIT / WAGNER IC / CYBA SCOOPS / BC STAGE2 LPFP 10.98 @ 131
Reply With Quote
(#3427)
Old
mightbaal mightbaal is offline
Junior Member
 
Posts: 265
Join Date: Jun 2015
Car: 2008 335xi
Default 09-02-2017, 12:01 AM

Quote:
Originally Posted by JazRedGT
Not anymore. Terry disabled the auto clear feature. Legal issues.
Where can I get the last map with it or is this in the jb4?


2008 335xi FBO JB4 BMS E85 Backend flash E60 Gas VRSF Chargepipe /w HKS BOV VRSF 7 inch FMIC DCI VRSF DOWNP xHP Stage 3 flashed
Reply With Quote
(#3428)
Old
JazRedGT JazRedGT is offline
Junior Member
 
Posts: 241
Join Date: Jul 2015
Car: 2007 335i E-92 6AT
Default 09-02-2017, 12:13 AM

Pretty sure he got rid of the old firmware and the old BEF that had it disabled. You can disable that code permanently yourself with Tuner Pro.


2007 AW 335i E-92 6AT MMP Stage 3 @ 24psi / JB4 G5 ISO / XHP STG3 / VRSF ** / MMP INLETS&OUTLETS / MHD E85 BACKEND / CW EXHAUST / CPe CP / GReddy RS BOV / BMS METH KIT / WAGNER IC / CYBA SCOOPS / BC STAGE2 LPFP 10.98 @ 131
Reply With Quote
(#3429)
Old
terryd5150 terryd5150 is offline
Junior Member
 
Posts: 71
Join Date: Apr 2015
Car: BMW 335xi
Default 09-02-2017, 09:10 AM

Here's a dumb question.

Are there BEF maps for the JB4 that can be loaded via Cobb?

If so, is there any difference between a Cobb-loaded BEF map and a MHD-loaded BEF map?
Reply With Quote
(#3430)
Old
JazRedGT JazRedGT is offline
Junior Member
 
Posts: 241
Join Date: Jul 2015
Car: 2007 335i E-92 6AT
Default 09-02-2017, 10:30 AM

No but I think you can download the free Bimmer-Boost flasher to load a backend flash.


2007 AW 335i E-92 6AT MMP Stage 3 @ 24psi / JB4 G5 ISO / XHP STG3 / VRSF ** / MMP INLETS&OUTLETS / MHD E85 BACKEND / CW EXHAUST / CPe CP / GReddy RS BOV / BMS METH KIT / WAGNER IC / CYBA SCOOPS / BC STAGE2 LPFP 10.98 @ 131
Reply With Quote
(#3431)
Old
Ericsson Ericsson is offline
New Member
 
Posts: 3
Join Date: Sep 2016
Car: E82, 135i - 2008
Default 09-04-2017, 01:05 PM

Quote:
Originally Posted by MHD
That is an issue caused by the way the BMS maps are provided (as canned bin). You can copy all tuning tables to the proper OEM map (MHD > stock maps op > generate updated bin).
MHD, could you, or anyone else for that matter , please elaborate on this a bit? I find my self in the same position, with the loss of cruise control after a BMS BEF flash.

1. What does the 'Generate updated backup' function do exactly, and...
2. ...how could one use it to fix this particular issue? What would the needed steps be, in what order.

Thanks in advance!

Last edited by Ericsson; 09-04-2017 at 10:12 PM..
Reply With Quote
(#3432)
Old
MHD's Avatar
MHD MHD is offline
Junior Member
 
Posts: 486
Join Date: Jul 2013
Car: 07 335i AT
Default MHd update 1.22 - 09-08-2017, 01:43 PM

- disabled the fuel pump while flashing - Thanks xHP team for the tip!
Reply With Quote
(#3433)
Old
martymil's Avatar
martymil martymil is offline
The Backyard Mechanic
 
Posts: 209
Join Date: May 2015
Car: BMW 1 Series M
Default 09-08-2017, 01:54 PM

You guys are legends

Now get back to work on injector control LOL hahaha
Reply With Quote
(#3434)
Old
Walruf Walruf is offline
New Member
 
Posts: 2
Join Date: Jul 2017
Car: 2009 e92 335i
Default 09-09-2017, 11:08 AM

I just wanted to post my experience using the new anti-rattle algorithm (FUD bit7 - Alternative anti-rattle algorithm):

It seems that it does not play nicely with the MHD BEF exhaust burble option. I have my car flashed to the softest and shortest burble option, but when I activated the FUD anti-rattle I started getting LOUD backfires at partial throttle. Deactivating it fixed the problem.

I did not try flashing to no burble and reactivating the FUD anti-rattle, but unless we hear about un-flashed people having backfire issues with it, I'm reasonably confident there's some issue with using both the burble and the anti-rattle.
Reply With Quote
(#3435)
Old
yellowfin's Avatar
yellowfin yellowfin is offline
Junior Member
 
Posts: 54
Join Date: May 2016
Car: 335xi - jb4 - DCI
Default MHD backend vs custom flash - 09-09-2017, 09:10 PM

Quote:
Originally Posted by MHD
- disabled the fuel pump while flashing - Thanks xHP team for the tip!
This is awesome!
BTW what is the difference between
- Flash a backend (formerly "flash a jb4 backend")
- Flash a custom map
I started from a bms map at some point, but by now it's pretty custom.
Are these options about licensing only, or is there a difference in the upload (like changing certain xdf parameters)?


2007 335xi -- VTT GC lites + inlets + outlets -- Fuel-it stg 2 lpfp -- CPE catted **, FMIC, CP -- Tial BOV -- BMS DCI + OCC -- RB PCV
JB4 + BMS bef (E50)
Reply With Quote
(#3436)
Old
Cynical Cynical is offline
Junior Member
 
Posts: 306
Join Date: May 2011
Car: 335i
Default 09-10-2017, 12:19 PM

Quote:
Originally Posted by MHD
- disabled the fuel pump while flashing - Thanks xHP team for the tip!
Its pretty scary that you just figured this out now.
Maybe you could stop charging us for wanting to boost above 22 psi too.
Reply With Quote
(#3437)
Old
threethirtyfive threethirtyfive is offline
Junior Member
 
Posts: 304
Join Date: Aug 2013
Car: 335i e90
Default 09-17-2017, 04:08 PM

Quote:
Originally Posted by yellowfin
I now have a fix for the 30FE at partial pedal input that I was dealing with for almost a year (http://www.n54tech.com/forums/showthread.php?p=505194 post #27). It happened mostly at light acceleration in 2nd up to high rpm, or under constant coasting uphill in higher gears. Menu 12 did not change a thing, because the pedal input is high enough to get out of the base duty. Every now and then I have seen in the support forum reports of 30FE that fall into this category, although some 30FE were due to other reasons.
The problem addressed here is that with JB4+BEF, ECU_PSI can exceed DME_BT at, say, 20-60% pedal. At WOT, JB4 scales the ECU_PSI down, but apparently not at partial pedal. With the BMS E85 flash, I had ECU_PSI often 2x above DME_BT at 50% pedal. I also observe a throttle closure that seems to be the DME fighting against the higher JB4 target. The solution is to bring DME_BT closer to the JB4 target over the full load range. Alternatively, JB4 could keep watch that ECU_PSI does to too much deviate from DME_BT, thatís maybe something to consider for the powers that be.

Ideally, you want to set boost curve (here, map 6 with up to 20psi) and JB4 pedal mapping (menu 11, I'm at 70%) first, and then set the DME_BT close to the JB4 target. The difficulty is to make this match for the full load/rpm range. What confused me first is that the Load to Torque table seems to define torque as a function of load and rpm, but I am now pretty much sure that the DME really uses it to define the load target (and hence the boost target) as function of rpm and torque request, the latter being calculated from the pedal input. To keep things simple, I modified the load breakpoints (1D) rather than changing the entire torque map (2D). The Figure below should explain. The engine was then a little too eager in idle, so I additionally modified the torque values under 2000 rpm to match the original load vs torque curve at the low end. For comparison, I show the load vs torque request curve original (ie BMS hybrid E85 bef) vs modified. Notice also the more linear curve at the high end in the modified mapping. I found that, at least for my car, the BMS bef sets DME_BT too low first, and then jumps all the way to max load. The latter is usually not too much of an issue although it can cause 30FF under certain circumstances.
Ah, yes, BTW, there are 3 Load/torque maps and breakpoints, I have no clue why. I simply changed all of them.

Anyways, I am very happy with my car now and hope the 30FE/30FF keep staying away.
The GC lites are a blast!

Attachment 65803
Dude, I thought I may be the only one! I have had this issue for the last two years and just haven't had the time to dig into it. It finally went away with my custom tune for my MMP's, at least I feel like it has, I will try it on the normal hill.


'07 e90
Reply With Quote
(#3438)
Old
brainsurgery brainsurgery is offline
Junior Member
 
Posts: 163
Join Date: Feb 2014
Car: BMW E91 LCI 335xi
Default 09-17-2017, 09:30 PM

Quote:
Originally Posted by threethirtyfive
Dude, I thought I may be the only one! I have had this issue for the last two years and just haven't had the time to dig into it. It finally went away with my custom tune for my MMP's, at least I feel like it has, I will try it on the normal hill.
I've had it too with stock turbos. Maybe this fix could be added to "official" back end maps? Or is there some downside why it has not been done already?


335i LCI xDrive AT, JB4, ***, Stage1 LPFP, MHD E85 flash.
Reply With Quote
(#3439)
Old
Jeffman's Avatar
Jeffman Jeffman is offline
Junior Member
 
Posts: 196
Join Date: Sep 2011
Car: 335xi
Default 09-18-2017, 07:56 AM

I just started getting this error with my stock turbos, but Flash-only, requesting 20+psi. Thanks for the fix!


2008 E90 335xi AT 63K MILES
MHD CUSTOM 93 OCT 24 PSI, N20 TMAP, FUEL-IT STG 2 LPFP, cPE CHARGE PIPE, HELIX IC, FORGE DV BLUE SPRINGS, BMS DCI, BMS T-STAT DELETE, BMS OCC, RB PCV, KW-V1 COILOVERS, APEX ARC-8, 235/265 MICHELIN PSS, xHP STAGE 3, SCOOPS
PR IGNITION - COMING SOON!
Reply With Quote
(#3440)
Old
Chuckybob Chuckybob is offline
New Member
 
Posts: 7
Join Date: Mar 2017
Car: 08 BMW 135i
Default 09-18-2017, 02:55 PM

If I'm running e40 full mhd flash, I have inlets outlets and down *****, do you think I need a custom tune or mhd takes into consideration the mmp inlets and outlets.
Reply With Quote
(#3441)
Old
yellowfin's Avatar
yellowfin yellowfin is offline
Junior Member
 
Posts: 54
Join Date: May 2016
Car: 335xi - jb4 - DCI
Default 09-18-2017, 09:20 PM

I did a bit of fine tuning since, see below (notice not only table values, but breakpoints, too). Thing is, I can't say this will work for every setup, but it gives you an idea where to start. Key is to bring DME and JB4 targets in sync. It certainly works for me, although I find it's a very narrow window between 30fe and 30ff. After 2 months without code, I got 30ff in 4th at 1/2 pedal the other day, and upped menu 11 from 70% to 80% in response (ie, higher jb4 target at lower pedal). Fingers crossed. I think it would be nice if - within some bounds - JB4 would keep ECU_psi closer to DME_BT at partial pedal. On the other hand, I also believe that keeping the JB4 and DME targets in sync is good tuning practice in general.

Funny thing about the 30ff is that it sometimes comes with 3100, sometimes not (go figure). The BMS flash has 30ff disabled, but I highly recommend to keep enabled. I am fairly confident to say that when 30ff/30fe come with 3100, you still get kicked in limp even when the codes (all 3 of them, I have tried) are disabled in the flash. The car just does not tell you you're in limp, and you have to restart to get out of limp. Then again, all this is for I8A0S, I don't know if things are different for other DME versions.

load to torque
Name:  load2torque.jpg
Views: 83
Size:  166.6 KB
pedal mapping (this may also play a role)
Name:  pedal-mapping.jpg
Views: 82
Size:  120.6 KB


2007 335xi -- VTT GC lites + inlets + outlets -- Fuel-it stg 2 lpfp -- CPE catted **, FMIC, CP -- Tial BOV -- BMS DCI + OCC -- RB PCV
JB4 + BMS bef (E50)
Reply With Quote
(#3442)
Old
yellowfin's Avatar
yellowfin yellowfin is offline
Junior Member
 
Posts: 54
Join Date: May 2016
Car: 335xi - jb4 - DCI
Default 09-18-2017, 09:31 PM

Quote:
Originally Posted by Jeffman
I just started getting this error with my stock turbos, but Flash-only, requesting 20+psi. Thanks for the fix!
In flash-only, you won't have the problem that jb4 and dme targets are out of whack. Maybe look in the wgdc tables, also boost/torque ceilings? That's the one thing I don't have to worry about with jb4.


2007 335xi -- VTT GC lites + inlets + outlets -- Fuel-it stg 2 lpfp -- CPE catted **, FMIC, CP -- Tial BOV -- BMS DCI + OCC -- RB PCV
JB4 + BMS bef (E50)
Reply With Quote
(#3443)
Old
Jeffman's Avatar
Jeffman Jeffman is offline
Junior Member
 
Posts: 196
Join Date: Sep 2011
Car: 335xi
Default 09-18-2017, 10:13 PM

That's exactly what I''m doing now - reducing boost crowing from 1.5 to 1.4 bar, and to flatten out the load curve. Fingers crossed !


2008 E90 335xi AT 63K MILES
MHD CUSTOM 93 OCT 24 PSI, N20 TMAP, FUEL-IT STG 2 LPFP, cPE CHARGE PIPE, HELIX IC, FORGE DV BLUE SPRINGS, BMS DCI, BMS T-STAT DELETE, BMS OCC, RB PCV, KW-V1 COILOVERS, APEX ARC-8, 235/265 MICHELIN PSS, xHP STAGE 3, SCOOPS
PR IGNITION - COMING SOON!
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 - 2017, N54tech.com