JB4 +mhd BEF Car feels slower than it should be

Jake1z · 11-19-2020, 07:35 PM

2009 335xi 6 speed manual
Zero codes, fuel trims are spot on, boost is where it should be but the car just feels slow. Has c/l down pipes, dci, charge pipe, one step colder plugs, new valve cover and gasket, 3.5 map sensor, front drive shaft removed at the moment(but felt slower either way)

Ran both map 2 and currently running map 5... car feels like it should be faster than it is. fuel pressures seem fine in jb4 mobile app. what other parameters should i check to make sure everything is running good? Car feels like it runs out of steam at higher rpms.

_N54 · 11-19-2020, 08:34 PM

How does it feel at the low to mid range? The N54 on stock turbos always runs out of steam you can feel it falling flat on it's face after 5500 rpm and up. It's best to shift at 6,000-6,200.

Saif2018 · 11-20-2020, 12:54 AM

Quote:

Originally Posted by Jake1z

2009 335xi 6 speed manual
Zero codes, fuel trims are spot on, boost is where it should be but the car just feels slow. Has c/l down pipes, dci, charge pipe, one step colder plugs, new valve cover and gasket, 3.5 map sensor, front drive shaft removed at the moment(but felt slower either way)

Ran both map 2 and currently running map 5... car feels like it should be faster than it is. fuel pressures seem fine in jb4 mobile app. what other parameters should i check to make sure everything is running good? Car feels like it runs out of steam at higher rpms.

Logs?

Ran out of steam at what rpm?

Boost is meant to tapper at higher rpm because stock turbos run outta steam as S58 mentioned.

Soden82 · 11-20-2020, 06:09 AM

Make sure your jb4 is updated to latest firmware. You made sure you have 4/2 on using your steering wheel controls?

Jake1z · 11-20-2020, 06:13 AM

I'll do a log today. I've had two other 335is with the same exact mods, both were automatic but seem to pull harder then this car does. Im pretty sure I updated the jb4 when I bought it used about two months ago, but I'll check the firm ware just in case. I am running the 4/2 for the bef.

ragingpanda · 11-20-2020, 07:31 AM

Quote:

Originally Posted by Jake1z

2009 335xi 6 speed manual
Zero codes, fuel trims are spot on, boost is where it should be but the car just feels slow. Has c/l down pipes, dci, charge pipe, one step colder plugs, new valve cover and gasket, 3.5 map sensor, front drive shaft removed at the moment(but felt slower either way)

Ran both map 2 and currently running map 5... car feels like it should be faster than it is. fuel pressures seem fine in jb4 mobile app. what other parameters should i check to make sure everything is running good? Car feels like it runs out of steam at higher rpms.

torrque · 11-20-2020, 01:39 PM

Quote:

Originally Posted by Jake1z

2009 335xi 6 speed manual
front drive shaft removed at the moment(but felt slower either way)

WHY???

Jake1z · 11-20-2020, 03:06 PM

has a vibration while on the parkway took it out to isolate it. vibration went away so its either cv axles or drive shaft. I left the car and took my work truck home so I'll do a log on monday and report back thanks guys.

feuer · 11-20-2020, 06:50 PM

It would slower but safer with BEF vs JB4 alone.

blown07 · 11-20-2020, 09:05 PM

The newer BE flashes have much lower timing then they used to. This is my guess why your car feels slow. I did custom timing tables in Tuner Pro based on older BE flashes with good results.

335xi_full_throttle · 11-21-2020, 01:37 AM

Quote:

Originally Posted by blown07

The newer BE flashes have much lower timing then they used to. This is my guess why your car feels slow. I did custom timing tables in Tuner Pro based on older BE flashes with good results.

Do you mind posting pictures of the timing tables for the old bef?

Smgs1992 · 11-21-2020, 07:43 AM

What is your timing look like? DME could be pulling timing resulting in less power

Fuel-It! · 11-21-2020, 11:17 AM

Post up your JB4 log in one of their support threads and they can provide you with free tuning advice.

Silent9n54 · 11-21-2020, 03:27 PM

Were your other N54s AWD ? extra weight will make it slower

blown07 · 11-22-2020, 10:29 AM

Quote:

Originally Posted by 335xi_full_throttle

Do you mind posting pictures of the timing tables for the old bef?

If you want I will send you any of the older BMS flashes. Are you running the pump flash or race flash?

335xi_full_throttle · 11-22-2020, 11:02 AM

Quote:

Originally Posted by blown07

Quote:

Originally Posted by 335xi_full_throttle

Do you mind posting pictures of the timing tables for the old bef?

If you want I will send you any of the older BMS flashes. Are you running the pump flash or race flash?

Race

Jake1z · 11-23-2020, 01:30 PM

Took a log as I was getting onto the parkway today. Nothing crazy but maybe it will show something. Do I need to open with another app or just post a csv file right on here or what ever type of file it is.

Jake1z · 11-23-2020, 02:39 PM

what parameters should i show?

335xi_full_throttle · 11-23-2020, 03:45 PM

Quote:

Originally Posted by Jake1z

what parameters should i show?

If that's datazap, just provide a link for us to view it.

RoughKnight · 11-23-2020, 05:02 PM

shouldnt be this hard to help people lol...

Jake1z · 11-23-2020, 05:48 PM

https://datazap.me/u/jake1z/doesnt-f...21-24-27-28-29

_N54 · 11-27-2020, 11:25 AM

Cylinder 6 is getting some timing drop and your AFR looks to be lean. When I flashed with my custom MHD tune the logs looked strange, but when I reset the adaptations after instructed by the tuner everything started to look normal. Go on your MHD app and reset the adaptations and see how the logs look after. I did read some where that the flywheel on a manual car can cause a false knock on cylinder 6 so you can always check off the desensitized knock option in the app and reflash the car and see if cylinder 6 runs clean like all other cylinders.

11-19-2020, 07:35 PM	#1
Jake1z Private First Class 5 Rep 107 Posts Drives: 2008 335xi e92 Join Date: Oct 2013 Location: 732 NJ iTrader: (1)	JB4 +mhd BEF Car feels slower than it should be 2009 335xi 6 speed manual Zero codes, fuel trims are spot on, boost is where it should be but the car just feels slow. Has c/l down pipes, dci, charge pipe, one step colder plugs, new valve cover and gasket, 3.5 map sensor, front drive shaft removed at the moment(but felt slower either way) Ran both map 2 and currently running map 5... car feels like it should be faster than it is. fuel pressures seem fine in jb4 mobile app. what other parameters should i check to make sure everything is running good? Car feels like it runs out of steam at higher rpms. __________________ Black 09 335xi coupe 6MT Down pipes, Charge Pipe, DCI, JB4, 2 Step, BEF, 3.5 Bar, Last edited by Jake1z; 11-23-2020 at 02:38 PM..
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11-19-2020, 08:34 PM	#2
_N54 Captain 300 Rep 884 Posts Drives: 335d Join Date: Mar 2020 Location: USA iTrader: (0)	How does it feel at the low to mid range? The N54 on stock turbos always runs out of steam you can feel it falling flat on it's face after 5500 rpm and up. It's best to shift at 6,000-6,200. __________________ 2013 335is - sold 2011 335d
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11-20-2020, 06:09 AM	#4
Soden82 Major 483 Rep 1,200 Posts Drives: 2011 BMW M3 Join Date: Jun 2017 Location: Boston iTrader: (1) Garage List 2011 BMW M3 [0.00]	Make sure your jb4 is updated to latest firmware. You made sure you have 4/2 on using your steering wheel controls? __________________ 2009 BMW 335i 6MT big single (eventually) For now... MHD tuned VRSF Race IC DCI ATM exhaust
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11-20-2020, 06:13 AM	#5
Jake1z Private First Class 5 Rep 107 Posts Drives: 2008 335xi e92 Join Date: Oct 2013 Location: 732 NJ iTrader: (1)	I'll do a log today. I've had two other 335is with the same exact mods, both were automatic but seem to pull harder then this car does. Im pretty sure I updated the jb4 when I bought it used about two months ago, but I'll check the firm ware just in case. I am running the 4/2 for the bef. __________________ Black 09 335xi coupe 6MT Down pipes, Charge Pipe, DCI, JB4, 2 Step, BEF, 3.5 Bar,
	Appreciate 0 Quote

11-20-2020, 03:06 PM	#8
Jake1z Private First Class 5 Rep 107 Posts Drives: 2008 335xi e92 Join Date: Oct 2013 Location: 732 NJ iTrader: (1)	has a vibration while on the parkway took it out to isolate it. vibration went away so its either cv axles or drive shaft. I left the car and took my work truck home so I'll do a log on monday and report back thanks guys. __________________ Black 09 335xi coupe 6MT Down pipes, Charge Pipe, DCI, JB4, 2 Step, BEF, 3.5 Bar,
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11-20-2020, 06:50 PM	#9
feuer Major General 4277 Rep 9,209 Posts Drives: wife crazy! Join Date: Apr 2015 Location: Chicago, IL iTrader: (5)	It would slower but safer with BEF vs JB4 alone.
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11-20-2020, 09:05 PM	#10
blown07 Lieutenant 202 Rep 449 Posts Drives: 335i Join Date: Jul 2013 Location: Tijuana iTrader: (0)	The newer BE flashes have much lower timing then they used to. This is my guess why your car feels slow. I did custom timing tables in Tuner Pro based on older BE flashes with good results. __________________ 335i FBO,Meth,JB4,Sutphin flash,LSD,GCLites 11.25@127.4 on NT05R 335xi FBO,Meth,JB4,Sutphin flash,VTT stage1 11.38 1/4 - 7.30 1/8th - 3.35 0 to 60 @ 0C
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11-21-2020, 07:43 AM	#12
Smgs1992 Captain 721 Rep 946 Posts Drives: 2007 bmw 335i Join Date: Apr 2020 Location: Cincinnati ohio iTrader: (0)	What is your timing look like? DME could be pulling timing resulting in less power __________________ 07 E92 335i 6MT, MMP inlets, DCI, VRSF 7.5 competition intercooler, VRSF catless downpipes, VRSF chargepipe, 335is clutch, Vader Solutions stage 2 LPFP, MHD stage 2+, Hawk HPS 5.0 pads, R1 Concepts drilled slotted rotors, TSW Nurburgring 19x8 19x9.5
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11-21-2020, 11:17 AM	#13
Fuel-It! Banned 550 Rep 949 Posts Drives: M4, M5, M2C, X4M, 440i, etc... Join Date: Mar 2019 Location: Phoenix AZ iTrader: (0)	Post up your JB4 log in one of their support threads and they can provide you with free tuning advice.
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11-21-2020, 03:27 PM	#14
Silent9n54 Captain 574 Rep 940 Posts Drives: 2007 E92 335i Join Date: Jul 2017 Location: Vancouver, Canada iTrader: (0)	Were your other N54s AWD ? extra weight will make it slower __________________ 2007 E92 335i / FBO + Inlets / E85 Custom Tune by WedgePerformance / 9.68 @ 140 / TPC Stage 2 19T / 2.1s 0-60 mph / 2010 535Xi 6MT - 437M - MHD / Instagram @Silent9n54
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11-23-2020, 01:30 PM	#17
Jake1z Private First Class 5 Rep 107 Posts Drives: 2008 335xi e92 Join Date: Oct 2013 Location: 732 NJ iTrader: (1)	Took a log as I was getting onto the parkway today. Nothing crazy but maybe it will show something. Do I need to open with another app or just post a csv file right on here or what ever type of file it is. __________________ Black 09 335xi coupe 6MT Down pipes, Charge Pipe, DCI, JB4, 2 Step, BEF, 3.5 Bar,
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11-23-2020, 02:39 PM	#18
Jake1z Private First Class 5 Rep 107 Posts Drives: 2008 335xi e92 Join Date: Oct 2013 Location: 732 NJ iTrader: (1)	what parameters should i show? Attached Images __________________ Black 09 335xi coupe 6MT Down pipes, Charge Pipe, DCI, JB4, 2 Step, BEF, 3.5 Bar,
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11-23-2020, 05:02 PM	#20
RoughKnight Private First Class 54 Rep 174 Posts Drives: BMW 335xi N54 Auto Join Date: Apr 2019 Location: Ottawa Ontario iTrader: (0)	shouldnt be this hard to help people lol... __________________ -------------------------------------------------------- ARM CP, DP, 7.5 FMIC, TiAl Q Bov MHD Stage2+/xHP/xDelete Road to 500hp daily on the way (ya right lol) --------------------------------------------------------
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11-23-2020, 05:48 PM	#21
Jake1z Private First Class 5 Rep 107 Posts Drives: 2008 335xi e92 Join Date: Oct 2013 Location: 732 NJ iTrader: (1)	https://datazap.me/u/jake1z/doesnt-f...21-24-27-28-29 __________________ Black 09 335xi coupe 6MT Down pipes, Charge Pipe, DCI, JB4, 2 Step, BEF, 3.5 Bar,
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11-27-2020, 11:25 AM	#22
_N54 Captain 300 Rep 884 Posts Drives: 335d Join Date: Mar 2020 Location: USA iTrader: (0)	Cylinder 6 is getting some timing drop and your AFR looks to be lean. When I flashed with my custom MHD tune the logs looked strange, but when I reset the adaptations after instructed by the tuner everything started to look normal. Go on your MHD app and reset the adaptations and see how the logs look after. I did read some where that the flywheel on a manual car can cause a false knock on cylinder 6 so you can always check off the desensitized knock option in the app and reflash the car and see if cylinder 6 runs clean like all other cylinders. __________________ 2013 335is - sold 2011 335d
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