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discreet_335i discreet_335i is offline
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Default 06-09-2015, 09:37 PM

Quote:
Originally Posted by discreet_335i
Terry id like to take you up on this. Can you send me your email address? Here's mine.
Flores.maurice@gmail.com
Help me out terry please. My car randomly shuts off when the jb4 activates.. you know after it reaches the temp for it to kick on. While in reverse at times it bucks quite a bit... While at a stop while in drives idle is sometimes rough.

I have played around with the base duty cycle thinking it may be the problem but no change regardless of setting. Spark plugs are somewhat fresh and are gapped at .28".

No code being thrown that would hint a misfire or something along those lines.


Mods - **, FMIC, JB4, and INTAKE.
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GuidoDoc GuidoDoc is offline
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Default 06-10-2015, 04:48 PM

Getting close to finally getting JB4 for my 2011 e90 n55 xdrive 6MT and there are a few questions for which the answers elude me even with having searched the forum.

Do new units purchased today come setup as ISO with the diode removed or do we still have to do this when the unit arrives?

I read about the water pump battery drain issue. Is that resolved on new jB4 units?

Are firmware updates necessary right out of the box?

I also read about boost beinging limited in 1st and 2nd gear. Is that true and if so does it apply to 6MT?

Sorry if these are lame noob questions. Thanks for the help.
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E90 335xi E90 335xi is offline
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Default 06-10-2015, 06:30 PM

Quote:
Originally Posted by GuidoDoc
Getting close to finally getting JB4 for my 2011 e90 n55 xdrive 6MT and there are a few questions for which the answers elude me even with having searched the forum.

Do new units purchased today come setup as ISO with the diode removed or do we still have to do this when the unit arrives?

I read about the water pump battery drain issue. Is that resolved on new jB4 units?

Are firmware updates necessary right out of the box?

I also read about boost beinging limited in 1st and 2nd gear. Is that true and if so does it apply to 6MT?

Sorry if these are lame noob questions. Thanks for the help.
Hey there, I have the exact same car.

I bought mine a few months ago and the diode was not cut. I don't think they are by default, unless you ask BMS specifically. Not everyone wants/needs the ISO.

Never heard about water pump battery drain issue - I've not had it I guess.

Firmware updates are not necessary but recommended. Bugs are worked out, smoothness is improved, and finally since 5_8 came out just recently, trims can now be logged for N55s.

Boost limiting is a user-defined option, so you can decide if you want to limit boost in 1st / 2nd / 3rd, or not. With xDrive, you'll have all the traction you need, and you won't put enough load on the car to fully spool the turbo in 1st and 2nd anyway. Really, this feature only benefits RWD guys.

Make sure you get an upgraded chargepipe. The factory one will crack very quickly with the higher boost.

Enjoy!


2011 E90 335i xDrive 6MT
BMS JB4 ISO 5_9, FF wires, VRSF CP, GFB DV+
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msabiha2003 msabiha2003 is offline
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Default 06-10-2015, 08:49 PM

HI GUYS,
I just wanna tell my experience with the n55 ISO upgrade.
i did the mod about 2 weeks ago , and let me say that its a HUGE different now , its much smoother and feels a lot quicker. i also installed the FFW added 5 gallons of e85 the rest 93. WOwww .
a friend of mine couldn't wait to do his also, so i just did it for him and he is .
thanks for guys @ BMS
i included a log for anybody interested to look at
Attached Files
File Type: csv 2015-06-04 22_35_09.csv (8.3 KB, 193 views)


2011 e92 xdrive, automatic, jb4 g5 iso, vrsf ********, drop in air filter, VRSF 7`FMIC, alpine b3 trans flash
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harkes harkes is offline
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Default 06-11-2015, 02:10 AM

I don't get the default Auto Shift Boost Reduction of 60. There is a huge hesitation on boost after gear shifts on my F-series. A value like 8 feel sooo much better - any problems using this?
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 06-11-2015, 08:53 AM

Quote:
Originally Posted by harkes
I don't get the default Auto Shift Boost Reduction of 60. There is a huge hesitation on boost after gear shifts on my F-series. A value like 8 feel sooo much better - any problems using this?
That is an E series setting. F series would be closer to 8-10.


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.
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///N55Power's Avatar
///N55Power ///N55Power is offline
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Default 06-12-2015, 12:13 AM

@Terry@BMS why does the E series with the 6MT need the autoshift boost reduction so high? My car drives SOOO much better with values of 20-30. Much more responsive. Should I change it back? I tried to do a log, but the USB connections on my laptop keep loosing the connection when I do a pull and it disconnects.
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Dr3am Dr3am is offline
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Default 06-12-2015, 04:47 AM

Quote:
Originally Posted by F335i
Yes. and you don't need the flex fuel wires unless you're going to put more than 20% E-85 mix in your tank. Also, I believe after a certain date, the tunes are shipped with the ISO mod already. no need to cut anything. I don't know that date. As off the N54 I know they started shipping them with ISO mod starting around august of last year. E-mail terry to see if yours is already ISO modded.
Not true -- The n55 JB4 stage II for the E90 does not come modded for the ISO, it will need board *modification*, you just don't need to ship your board in and have it exchanged. The language in the E90 ISO forum sticky isn't too clear when it says you don't have to change your board, you just have to modify the one you have.

Just posting this since the topic caused me much confusion when I first started playing with the ISO and started getting caught up in this G5, G4 stuff... which just isn't applicable to the n55 motor.
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Default 06-12-2015, 10:36 AM

Quote:
Originally Posted by ///N55Power
@Terry@BMS why does the E series with the 6MT need the autoshift boost reduction so high? My car drives SOOO much better with values of 20-30. Much more responsive.
+1


2013 135is 6mt - FBO - Pure stg2 - 90/10 meth - Fuel-It stg2
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E90 335xi E90 335xi is offline
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Default 06-15-2015, 07:09 AM

Quote:
Originally Posted by GR1P
+1
+2

I do notice some post-shift laggyness in my MT, but I haven't played with the autoshift boost reduction settings until we get an answer on this.


2011 E90 335i xDrive 6MT
BMS JB4 ISO 5_9, FF wires, VRSF CP, GFB DV+
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Newguy123 Newguy123 is offline
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Default 06-15-2015, 07:17 AM

lower the value from 60 0n down for e series cars if you feel its lagging post shift. i had mine down at 20 when i was on a maxed out S1 turbo. now at stage 2 im back up at 60 its just happy there every car is different


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E90 335xi E90 335xi is offline
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Default 06-15-2015, 02:21 PM

Quote:
Originally Posted by Newguy123
lower the value from 60 0n down for e series cars if you feel its lagging post shift. i had mine down at 20 when i was on a maxed out S1 turbo. now at stage 2 im back up at 60 its just happy there every car is different
Is there anything unsafe about lowering the value, or will the usual safety checks (i.e. map 4) kick-in if/as needed?


2011 E90 335i xDrive 6MT
BMS JB4 ISO 5_9, FF wires, VRSF CP, GFB DV+
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Default 06-15-2015, 02:23 PM

Quote:
Originally Posted by E90 335xi
Is there anything unsafe about lowering the value, or will the usual safety checks (i.e. map 4) kick-in if/as needed?
No but it might start over boosting so keep an eye


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F335i F335i is offline
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Default 06-17-2015, 07:40 PM

In my experience with an auto N55, it depends where you shift, if you shift very early like me at 5k, I know it's very early. I set my autoboost reduction to 100 because early shifting causes over boost so I need it high. If you shift at 6k+ then 60 is safe. I messed around with this setting a lot and I concluded that you just want a smooth shift without a large over boost spike because it will hurt your timing & boost. Boost & timing needs to correct it self after a spike. You probably feel 20 is good because you're not reducing your boost by much and you feel responsiveness because of that boost spike, but look at your logs and see if your timing & boost is correcting (lowering) too much and make adjustments until you get a smooth boost & timing after shift. Be advised this for auto never tested a manual.


JB4 S2+ISO Map 7, BMS **, BMS chargepipe, BMS Intake, Flex fuel wires, BMS OCC.
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tboudre tboudre is offline
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Default 06-18-2015, 04:39 AM

I don't know if this is a related issue, but since 5.8 firmware, if I give it partial throttle and let off it seems to boost quickly, then cut boost completely and the BOV actuates. (N55 electronic BOV, right?). Then I get back on the throttle and it kicks back up, but ends up doing a kind of bucking. I would think this might have to do with the PID setting. I changed the setting when I went to the ISO and haven't touched it since, and my autoboost reduction is also untouched and should be the recommended 60, I have to remember to doublecheck next time I hook up the app. I also sometimes get a gauge sweep while driving (JB4 resetting) since the 5.8 firmware, but not while having this issue. I just replaced my battery, thought that might have something to do with the reset, but it's still doing it. I should have done some troubleshooting before posting, but writing it down might help me get my thoughts on it together and maybe someone has a suggestion I can try.


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
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E90 335xi E90 335xi is offline
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Default 06-23-2015, 07:49 PM

Just an update on the Auto Shift Boost Reduction: it's for automatic transmissions only.

Steve has suggested the value to be 0 on MT cars to prevent it from accidentally triggering (in this thread: http://www.n54tech.com/forums/showth...660#post384660)

I've set mine to 0 (used to be 60) and have noticed less lag after shifts, with no overboost issues.



2011 E90 335i xDrive 6MT
BMS JB4 ISO 5_9, FF wires, VRSF CP, GFB DV+
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Sir Jake Sir Jake is offline
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Default 06-25-2015, 04:00 PM

Thanks I believe I dropped mine to 40 the other day and forgot to log anything. I'll change it to 0 after!
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Dr3am Dr3am is offline
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Default 06-25-2015, 06:33 PM

Quote:
Originally Posted by F335i
In my experience with an auto N55, it depends where you shift, if you shift very early like me at 5k, I know it's very early. I set my autoboost reduction to 100 because early shifting causes over boost so I need it high. If you shift at 6k+ then 60 is safe. I messed around with this setting a lot and I concluded that you just want a smooth shift without a large over boost spike because it will hurt your timing & boost. Boost & timing needs to correct it self after a spike. You probably feel 20 is good because you're not reducing your boost by much and you feel responsiveness because of that boost spike, but look at your logs and see if your timing & boost is correcting (lowering) too much and make adjustments until you get a smooth boost & timing after shift. Be advised this for auto never tested a manual.
I think this is probably the most informative comment regarding boost reduction (assuming accurate) I've read yet. Also I believe this is the culprit for my timing drops after shifting....I'm getting alittle over boost myself.
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TDDaryl TDDaryl is offline
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Default 07-05-2015, 08:22 PM

I too am getting gauge sweeps while driving. I just ignored it because it doesnt effect the car but it does freak me out when it happens. This also started when I jumped to the 5.8 ISO.


2012 E82 FBO JB4 (Daily)
2008 335x 6466 ST (being rebuilt and upgraded)
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 07-05-2015, 08:34 PM

Quote:
Originally Posted by TDDaryl
I too am getting gauge sweeps while driving. I just ignored it because it doesnt effect the car but it does freak me out when it happens. This also started when I jumped to the 5.8 ISO.
The newer one is pulling more from the CANbus so ensure those CANbus wires are clean. You can also try soldering them as a test.


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.
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TDDaryl TDDaryl is offline
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Default 07-05-2015, 08:41 PM

Thanks. I will give that a go.


2012 E82 FBO JB4 (Daily)
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 07-05-2015, 08:44 PM

If that doesn't do it email me, and I can just manually slow down the CANbus rate for you as a test.


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.
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TDDaryl TDDaryl is offline
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Default 07-05-2015, 08:46 PM

Ok thanks!


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2008 335x 6466 ST (being rebuilt and upgraded)
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paradoxical3 paradoxical3 is offline
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Default 07-05-2015, 10:08 PM

also getting sweeps, will inspect canbus wires tomorrow
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djfellipe djfellipe is offline
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Default 07-06-2015, 07:23 AM

Same here, getting sweeps every now and then after uploading 5_8. Was also having some weird boost issues. Decided to go back to 5_7, everything is smooth again.

2011 335xi 6mt, **, cp, bms intake, running 8gal of e85 + 93.
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File Type: csv 2015-06-30 09_51_49.csv (9.1 KB, 105 views)
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