Lag after Downpipes

e92_boost · 03-14-2015, 06:14 PM

Well just installed my VRSF Downpipes and HOLY LAG, has anyone experienced this? I did 1 & 7 on JB4 to have it adapt and still laggy. Can anyone chime in on this? The rattle got louder but I was expecting that thinking of upgrading to RB soon to get away from the annoying noise.

SM335i · 03-14-2015, 06:20 PM

No lag whatsoever when I installed mines.. Actually felt the opposite, like the turbos breathe better

e92_boost · 03-14-2015, 06:22 PM

I wonder if it's just me or what im having my cousin e92ben check it out and see what he says.

e92_boost · 03-14-2015, 07:01 PM

Found the issue I had it on map 4 switched to map 5 full throttle and sometimes jumps to map 4 again

///Mposter · 03-14-2015, 08:22 PM

You might have swapped the O2 sensors from bank 1 to bank 2 . Did you mark the pre-c a t ones ? Did you also mark the rear ones too? The rear connectors can easily be swapped. Also double check that you didn't install the v-band clamp in front of the wastegate arm.

///Mposter · 03-14-2015, 08:28 PM

The rear turbo vband location out of the way of the wastegate arm .

e92_boost · 03-15-2015, 12:11 AM

Quote:

Originally Posted by ///Mposter

You might have swapped the O2 sensors from bank 1 to bank 2 . Did you mark the pre-c a t ones ? Did you also mark the rear ones too? The rear connectors can easily be swapped. Also double check that you didn't install the v-band clamp in front of the wastegate arm.

So you think the rear ones are opposite now?

e92_boost · 03-15-2015, 12:12 AM

Quote:

Originally Posted by ///Mposter

The rear turbo vband location out of the way of the wastegate arm .

What do you mean by this picture im confused still learning.

e92_boost · 03-15-2015, 12:45 AM

Can you see it their? That was when the screw wasn't on the clamp

924er · 03-15-2015, 01:01 AM

You did something wrong. I felt way faster spooling and more power. Hands down best mod aside from Cobb. No wastegate rattle except on cold start but goes away after one minute

e92_boost · 03-15-2015, 10:57 AM

Quote:

Originally Posted by 924er

You did something wrong. I felt way faster spooling and more power. Hands down best mod aside from Cobb. No wastegate rattle except on cold start but goes away after one minute

Power is crazy and no lag before when I tried it it was on map 4 and when I'm on map 5 sometimes it kicks me off to map 4

924er · 03-15-2015, 03:29 PM

Quote:

Originally Posted by e92_boost

Quote:

Originally Posted by 924er

You did something wrong. I felt way faster spooling and more power. Hands down best mod aside from Cobb. No wastegate rattle except on cold start but goes away after one minute

Power is crazy and no lag before when I tried it it was on map 4 and when I'm on map 5 sometimes it kicks me off to map 4

Yeah I wouldn't know why cuz I don't have jb4

FoShizzle · 03-15-2015, 06:10 PM

I had this happen to me a few times when I first put on my downpipes. It went away when I upgraded the jb4 firmware from 27x to 28.5b. Try putting some better fuel also.
Edit: just saw on n54tech that there were a few known bugs in the 27.x firmware that were fixed in 28.

Flex68 · 03-15-2015, 06:35 PM

How do you update the firmware ???

FoShizzle · 03-15-2015, 07:05 PM

http://www.n54tech.com/forums/showthread.php?t=10605

e92_boost · 03-16-2015, 12:48 AM

So you think it could be the firmware?

xrt_si · 03-16-2015, 09:54 AM

Quote:

Originally Posted by 924er

You did something wrong. I felt way faster spooling and more power. Hands down best mod aside from Cobb. No wastegate rattle except on cold start but goes away after one minute

I had exactly the same experience. Throttle response improved dramatically.

Brule · 03-16-2015, 07:58 PM

The known JB4 bugs are always very minor and very specific types of applications being improved.

I don't think firmware would change whats happening here but I would strongly recommend loading the updated firmware.

Throttle response will be determined by the settings of the menu 10 and 12 rather than firmware updates.

e92_boost · 03-16-2015, 09:05 PM

It hasn't done it anymore I haven't updated the firmware either

03-14-2015, 06:14 PM	#1
e92_boost Captain 228 Rep 703 Posts Drives: Smart Car Join Date: Nov 2014 Location: Kenosha Wi iTrader: (0)	Well just installed my VRSF Downpipes and HOLY LAG, has anyone experienced this? I did 1 & 7 on JB4 to have it adapt and still laggy. Can anyone chime in on this? The rattle got louder but I was expecting that thinking of upgrading to RB soon to get away from the annoying noise. __________________ ESS G1 e90 - BBS E88
	Appreciate 0 Tweet Quote

03-14-2015, 06:20 PM	#2
SM335i Banned 106 Rep 1,059 Posts Drives: Car Join Date: Apr 2013 Location: Location iTrader: (0)	No lag whatsoever when I installed mines.. Actually felt the opposite, like the turbos breathe better
	Appreciate 0 Quote

03-14-2015, 06:22 PM	#3
e92_boost Captain 228 Rep 703 Posts Drives: Smart Car Join Date: Nov 2014 Location: Kenosha Wi iTrader: (0)	I wonder if it's just me or what im having my cousin e92ben check it out and see what he says. __________________ ESS G1 e90 - BBS E88
	Appreciate 0 Quote

03-14-2015, 07:01 PM	#4
e92_boost Captain 228 Rep 703 Posts Drives: Smart Car Join Date: Nov 2014 Location: Kenosha Wi iTrader: (0)	Found the issue I had it on map 4 switched to map 5 full throttle and sometimes jumps to map 4 again __________________ ESS G1 e90 - BBS E88
	Appreciate 0 Quote

03-14-2015, 08:22 PM	#5
///Mposter Macgyver 213 Rep 942 Posts Drives: 2007 e92 335i Join Date: Jun 2011 Location: Greensboring iTrader: (0)	You might have swapped the O2 sensors from bank 1 to bank 2 . Did you mark the pre-c a t ones ? Did you also mark the rear ones too? The rear connectors can easily be swapped. Also double check that you didn't install the v-band clamp in front of the wastegate arm. __________________ GTX3076R , ADV, JB4, FMIC, BOV, 17"APEX, 255/40/17 SQ, 6-SPD Manual
	Appreciate 1 Quote

03-14-2015, 08:28 PM	#6
///Mposter Macgyver 213 Rep 942 Posts Drives: 2007 e92 335i Join Date: Jun 2011 Location: Greensboring iTrader: (0)	The rear turbo vband location out of the way of the wastegate arm . Attached Images __________________ GTX3076R , ADV, JB4, FMIC, BOV, 17"APEX, 255/40/17 SQ, 6-SPD Manual
	Appreciate 0 Quote

03-15-2015, 12:45 AM	#9
e92_boost Captain 228 Rep 703 Posts Drives: Smart Car Join Date: Nov 2014 Location: Kenosha Wi iTrader: (0)	Can you see it their? That was when the screw wasn't on the clamp Attached Images __________________ ESS G1 e90 - BBS E88
	Appreciate 0 Quote

03-15-2015, 01:01 AM	#10
924er Colonel 352 Rep 2,049 Posts Drives: e92 335i '10 Join Date: Feb 2014 Location: Socal iTrader: (0)	You did something wrong. I felt way faster spooling and more power. Hands down best mod aside from Cobb. No wastegate rattle except on cold start but goes away after one minute __________________ '10 e92 N54 DCI intakes, ER chargepipe, TIAL BOV, VRSF 5in FMIC, BMS Downpipes COBB e30
	Appreciate 0 Quote

03-15-2015, 06:10 PM	#13
FoShizzle aka Mike 108 Rep 1,395 Posts Drives: AW E92 335is Join Date: Jun 2008 Location: LA/Ventura, CA iTrader: (11)	I had this happen to me a few times when I first put on my downpipes. It went away when I upgraded the jb4 firmware from 27x to 28.5b. Try putting some better fuel also. Edit: just saw on n54tech that there were a few known bugs in the 27.x firmware that were fixed in 28.
	Appreciate 0 Quote

03-15-2015, 06:35 PM	#14
Flex68 Captain 76 Rep 853 Posts Drives: E92 335i Join Date: Mar 2015 Location: Australia iTrader: (0)	How do you update the firmware ???
	Appreciate 1 Quote

03-15-2015, 07:05 PM	#15
FoShizzle aka Mike 108 Rep 1,395 Posts Drives: AW E92 335is Join Date: Jun 2008 Location: LA/Ventura, CA iTrader: (11)	http://www.n54tech.com/forums/showthread.php?t=10605
	Appreciate 0 Quote

03-16-2015, 12:48 AM	#16
e92_boost Captain 228 Rep 703 Posts Drives: Smart Car Join Date: Nov 2014 Location: Kenosha Wi iTrader: (0)	So you think it could be the firmware? __________________ ESS G1 e90 - BBS E88
	Appreciate 0 Quote

03-16-2015, 07:58 PM	#18
Brule Brigadier General 842 Rep 3,190 Posts Drives: 2007 335i e92 6spd man Join Date: Jul 2013 Location: Darwin iTrader: (0)	The known JB4 bugs are always very minor and very specific types of applications being improved. I don't think firmware would change whats happening here but I would strongly recommend loading the updated firmware. Throttle response will be determined by the settings of the menu 10 and 12 rather than firmware updates.
	Appreciate 0 Quote

03-16-2015, 09:05 PM	#19
e92_boost Captain 228 Rep 703 Posts Drives: Smart Car Join Date: Nov 2014 Location: Kenosha Wi iTrader: (0)	It hasn't done it anymore I haven't updated the firmware either __________________ ESS G1 e90 - BBS E88
	Appreciate 0 Quote