THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
2Addicts
2Addicts
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning BMW M2 Anti-Lag braaap sound after lifting the throttle

Post Reply
 
Thread Tools Search this Thread
      12-26-2019, 04:16 PM   #45
POMFKIMOCHI
Private First Class
POMFKIMOCHI's Avatar
Canada
39
Rep
188
Posts

Drives: 2017 M240i 6MT/RWD EBII
Join Date: May 2019
Location: Ontario

iTrader: (1)

Do you know if this is possible with the b58 as well?
Appreciate 0
      12-27-2019, 11:51 AM   #46
whoismorggan
Bimmer Nut + Software Dev
whoismorggan's Avatar
United_States
551
Rep
802
Posts

Drives: 2018 Audi S3 IE Stage 1
Join Date: Aug 2017
Location: Raleigh, NC

iTrader: (1)

Garage List
Still interested in this. It's not the shift "fart" between shifts. It's the anti-lag sound after letting off the throttle
__________________
Current: 2018 Audi S3 IE Stage 1
Past: '08 Infiniti G37S, '87 Porsche 944 Turbo, '13 328i, '15 M235i, '15 F80 M3, '16 M235i, '15 335i, '17 X5 xDrive35i
@whoismorggan
Appreciate 0
      12-28-2019, 05:39 PM   #47
Thomas590
Private
27
Rep
86
Posts

Drives: A3 2.0T
Join Date: Sep 2019
Location: EU

iTrader: (0)

Quote:
Originally Posted by POMFKIMOCHI View Post
Do you know if this is possible with the b58 as well?
I don't think so, the non Competition is using N55B30T0. Also, please everyone to reply here in F30 froums (https://f30.bimmerpost.com/forums/sh...php?p=25618337).
Appreciate 0
      12-29-2019, 10:14 AM   #48
julienjj
Private First Class
julienjj's Avatar
Canada
135
Rep
134
Posts

Drives: 135i 6MT
Join Date: May 2015
Location: Canada

iTrader: (0)

Small update, I finally got to read an M2 DME last week. I will be trying to get it to work on my n55 soon.
__________________
2016 435i xdrive Gran Coupé
2011 E82 1M Custom Frozen Brilliant White
2006 E60 M5 Alpine white SMG DELETE 6MT swap.
Gone : 135i 2008 | Gone : 2008 535i Touring|
Appreciate 0
      12-29-2019, 10:49 AM   #49
Thomas590
Private
27
Rep
86
Posts

Drives: A3 2.0T
Join Date: Sep 2019
Location: EU

iTrader: (0)

Quote:
Originally Posted by julienjj View Post
Small update, I finally got to read an M2 DME last week. I will be trying to get it to work on my n55 soon.
Thanks for the update!
The good sign is that you can have this sound even with manual transmission. Our cars are equipped with ZF AT instead of DCT, shouldn't be a problem to get this to work
Appreciate 0
      12-29-2019, 07:24 PM   #50
julienjj
Private First Class
julienjj's Avatar
Canada
135
Rep
134
Posts

Drives: 135i 6MT
Join Date: May 2015
Location: Canada

iTrader: (0)

Quote:
Originally Posted by Thomas590 View Post
Thanks for the update!
The good sign is that you can have this sound even with manual transmission. Our cars are equipped with ZF AT instead of DCT, shouldn't be a problem to get this to work
The X5 M f85 has the antilag as well. That feature is independant of the transmission.
__________________
2016 435i xdrive Gran Coupé
2011 E82 1M Custom Frozen Brilliant White
2006 E60 M5 Alpine white SMG DELETE 6MT swap.
Gone : 135i 2008 | Gone : 2008 535i Touring|
Appreciate 0
      01-04-2020, 03:00 PM   #51
Moflow
Lieutenant Colonel
Moflow's Avatar
United_States
2485
Rep
1,602
Posts

Drives: 2020 M2C 6MT
Join Date: Mar 2019
Location: Seattle

iTrader: (0)

I was doing a little research as to what makes this sound in my M2c, as I had previously thought it was a DSG only thing before taking delivery of my (manual) car.

My understanding is that the car doesn't have a blow-off valve. Traditionally, a BOV works on the INTAKE side of the turbo and relieves excess pressure when the driver suddenly lifts off the throttle (as that pressure has to go somewhere and without a BOV will go right back into the turbo the wrong way, severely slowing it down and prematurely wearing on the turbo.)

BMW's solution apparently is to just use the variable valve timing to overlap the intake and exhaust valves, letting the pressure wave blow right through the cylinders. Afterwards, it hits the exhaust side of the turbo, keeping it spooled and working as a sort of anti-lag. I think the braaap sound is probably a big pressure wave of air flowing through the cylinders without igniting.

Anyway, that's my understanding of things, I may be wrong, but if not, it's a pretty cool solution to both prolong turbo life and keep the turbos spooled at the same time, as traditional, old school anti-lag is super hard on the exhaust side of the turbo.

Someone please correct me if i'm wrong.
Appreciate 0
      01-09-2020, 06:20 AM   #52
O5E46M3
Enlisted Member
O5E46M3's Avatar
108
Rep
46
Posts

Drives: E46 M3
Join Date: Apr 2019
Location: Perth

iTrader: (0)

If this is solved I'll buy a damn M240i or M235i

Time to move on from my M3, don't like the M4 enough to buy and a nice M235i I can get for 30k AUD where as the cheapest M2 ATM is around 60k...

That's a lot of track mod money
Appreciate 0
      01-10-2020, 08:12 AM   #53
julienjj
Private First Class
julienjj's Avatar
Canada
135
Rep
134
Posts

Drives: 135i 6MT
Join Date: May 2015
Location: Canada

iTrader: (0)

Quote:
Originally Posted by Moflow View Post
I was doing a little research as to what makes this sound in my M2c, as I had previously thought it was a DSG only thing before taking delivery of my (manual) car.

My understanding is that the car doesn't have a blow-off valve. Traditionally, a BOV works on the INTAKE side of the turbo and relieves excess pressure when the driver suddenly lifts off the throttle (as that pressure has to go somewhere and without a BOV will go right back into the turbo the wrong way, severely slowing it down and prematurely wearing on the turbo.)

BMW's solution apparently is to just use the variable valve timing to overlap the intake and exhaust valves, letting the pressure wave blow right through the cylinders. Afterwards, it hits the exhaust side of the turbo, keeping it spooled and working as a sort of anti-lag. I think the braaap sound is probably a big pressure wave of air flowing through the cylinders without igniting.

Anyway, that's my understanding of things, I may be wrong, but if not, it's a pretty cool solution to both prolong turbo life and keep the turbos spooled at the same time, as traditional, old school anti-lag is super hard on the exhaust side of the turbo.

Someone please correct me if i'm wrong.
you're not very far from how it its.


Bad news is I tried the flash onto my N55 EWG and the software has FSC protection finally, so it's not possible to run it without some massive reverse engineering effort.
__________________
2016 435i xdrive Gran Coupé
2011 E82 1M Custom Frozen Brilliant White
2006 E60 M5 Alpine white SMG DELETE 6MT swap.
Gone : 135i 2008 | Gone : 2008 535i Touring|
Appreciate 1
Moflow2484.50
      01-13-2020, 05:24 AM   #54
ChristosD
First Lieutenant
ChristosD's Avatar
South Africa
97
Rep
373
Posts

Drives: m135i
Join Date: Sep 2015
Location: Durban

iTrader: (0)

Quote:
Originally Posted by Moflow View Post
I was doing a little research as to what makes this sound in my M2c, as I had previously thought it was a DSG only thing before taking delivery of my (manual) car.

My understanding is that the car doesn't have a blow-off valve. Traditionally, a BOV works on the INTAKE side of the turbo and relieves excess pressure when the driver suddenly lifts off the throttle (as that pressure has to go somewhere and without a BOV will go right back into the turbo the wrong way, severely slowing it down and prematurely wearing on the turbo.)

BMW's solution apparently is to just use the variable valve timing to overlap the intake and exhaust valves, letting the pressure wave blow right through the cylinders. Afterwards, it hits the exhaust side of the turbo, keeping it spooled and working as a sort of anti-lag. I think the braaap sound is probably a big pressure wave of air flowing through the cylinders without igniting.

Anyway, that's my understanding of things, I may be wrong, but if not, it's a pretty cool solution to both prolong turbo life and keep the turbos spooled at the same time, as traditional, old school anti-lag is super hard on the exhaust side of the turbo.

Someone please correct me if i'm wrong.
totally agree with you but just one thing how does this work on the n55 m2? as it does have a diverter valve
__________________

'14 F20 M135i EWG FBO:// INJEN INTAKE // PURE INLET// TURBOSMART BOV DUAL PORT //
//CSF INTERCOOLER // ER CP // SNOW S2.5 METH KIT // B58TU HPFP // NGK 97506 // ER DP // TMSS MID PIPE //MPE // MPBBK // UR STRUT BRACE // BM3 CUSTOM JORDAN E85 TUNE // XHP STAGE 3 //
Appreciate 0
      01-13-2020, 05:30 AM   #55
ChristosD
First Lieutenant
ChristosD's Avatar
South Africa
97
Rep
373
Posts

Drives: m135i
Join Date: Sep 2015
Location: Durban

iTrader: (0)

Quote:
Originally Posted by POMFKIMOCHI View Post
Do you know if this is possible with the b58 as well?
b58 make a similar ALS noise as well as they dont have a BOV or DV
__________________

'14 F20 M135i EWG FBO:// INJEN INTAKE // PURE INLET// TURBOSMART BOV DUAL PORT //
//CSF INTERCOOLER // ER CP // SNOW S2.5 METH KIT // B58TU HPFP // NGK 97506 // ER DP // TMSS MID PIPE //MPE // MPBBK // UR STRUT BRACE // BM3 CUSTOM JORDAN E85 TUNE // XHP STAGE 3 //
Appreciate 0
      01-14-2020, 12:13 AM   #56
POMFKIMOCHI
Private First Class
POMFKIMOCHI's Avatar
Canada
39
Rep
188
Posts

Drives: 2017 M240i 6MT/RWD EBII
Join Date: May 2019
Location: Ontario

iTrader: (1)

If it's just a trick with the VVT and timing, then it should be able to be implemented on vehicles with no bov through some coding and a flashable tune. It's not just a turbo fart, it has a unique resonance. Protuningfreaks please work your magic!
Appreciate 0
      01-19-2020, 03:18 AM   #57
Thomas590
Private
27
Rep
86
Posts

Drives: A3 2.0T
Join Date: Sep 2019
Location: EU

iTrader: (0)

Quote:
Originally Posted by POMFKIMOCHI View Post
If it's just a trick with the VVT and timing, then it should be able to be implemented on vehicles with no bov through some coding and a flashable tune. It's not just a turbo fart, it has a unique resonance. Protuningfreaks please work your magic!
Yea, if somebody could get this to work, they would earn big $.


Quote:
Originally Posted by ChristosD View Post
b58 make a similar ALS noise as well as they dont have a BOV or DV
It will be way easier to get it to work on M235i (N55) compared to M240i (B58).

Quote:
Originally Posted by julienjj View Post
you're not very far from how it its.


Bad news is I tried the flash onto my N55 EWG and the software has FSC protection finally, so it's not possible to run it without some massive reverse engineering effort.
Shet, thanks anyway for at least trying to get it to work. Everyone here appreciate your contribution.
Appreciate 0
      01-23-2020, 02:47 PM   #58
Thomas590
Private
27
Rep
86
Posts

Drives: A3 2.0T
Join Date: Sep 2019
Location: EU

iTrader: (0)

#Update
Appreciate 0
      01-30-2020, 02:05 AM   #59
kilerek
Registered
0
Rep
2
Posts

Drives: e92 n55
Join Date: Jan 2020
Location: Poland

iTrader: (0)



M235i, Wedge Performamce
Appreciate 0
      01-31-2020, 01:47 AM   #60
ChristosD
First Lieutenant
ChristosD's Avatar
South Africa
97
Rep
373
Posts

Drives: m135i
Join Date: Sep 2015
Location: Durban

iTrader: (0)

Quote:
Originally Posted by kilerek View Post


M235i, Wedge Performamce
WHAT how did you do this????
__________________

'14 F20 M135i EWG FBO:// INJEN INTAKE // PURE INLET// TURBOSMART BOV DUAL PORT //
//CSF INTERCOOLER // ER CP // SNOW S2.5 METH KIT // B58TU HPFP // NGK 97506 // ER DP // TMSS MID PIPE //MPE // MPBBK // UR STRUT BRACE // BM3 CUSTOM JORDAN E85 TUNE // XHP STAGE 3 //
Appreciate 0
      01-31-2020, 02:42 PM   #61
kilerek
Registered
0
Rep
2
Posts

Drives: e92 n55
Join Date: Jan 2020
Location: Poland

iTrader: (0)

This is post from facebook group, im waiting for solution.
Appreciate 0
      02-05-2020, 12:08 PM   #62
whoismorggan
Bimmer Nut + Software Dev
whoismorggan's Avatar
United_States
551
Rep
802
Posts

Drives: 2018 Audi S3 IE Stage 1
Join Date: Aug 2017
Location: Raleigh, NC

iTrader: (1)

Garage List
Quote:
Originally Posted by ChristosD View Post
WHAT how did you do this????
The mystery has beeen solveedd!

__________________
Current: 2018 Audi S3 IE Stage 1
Past: '08 Infiniti G37S, '87 Porsche 944 Turbo, '13 328i, '15 M235i, '15 F80 M3, '16 M235i, '15 335i, '17 X5 xDrive35i
@whoismorggan
Appreciate 0
      02-05-2020, 01:19 PM   #63
bbnks2
Colonel
1207
Rep
2,025
Posts

Drives: 135i N55
Join Date: Jan 2017
Location: NY

iTrader: (0)

Quote:
Originally Posted by f20two View Post
The mystery has beeen solveedd!

Wedge performance (steven B) is working on it.
Appreciate 1
      02-05-2020, 01:24 PM   #64
whoismorggan
Bimmer Nut + Software Dev
whoismorggan's Avatar
United_States
551
Rep
802
Posts

Drives: 2018 Audi S3 IE Stage 1
Join Date: Aug 2017
Location: Raleigh, NC

iTrader: (1)

Garage List
Sounds like it's pretty close
__________________
Current: 2018 Audi S3 IE Stage 1
Past: '08 Infiniti G37S, '87 Porsche 944 Turbo, '13 328i, '15 M235i, '15 F80 M3, '16 M235i, '15 335i, '17 X5 xDrive35i
@whoismorggan
Appreciate 0
      02-08-2020, 04:23 PM   #65
Thomas590
Private
27
Rep
86
Posts

Drives: A3 2.0T
Join Date: Sep 2019
Location: EU

iTrader: (0)

This is exactly what I was looking for! Holy moly, will post it at F30 forums.
AMAZING!
Appreciate 0
      03-02-2020, 03:44 PM   #66
whoismorggan
Bimmer Nut + Software Dev
whoismorggan's Avatar
United_States
551
Rep
802
Posts

Drives: 2018 Audi S3 IE Stage 1
Join Date: Aug 2017
Location: Raleigh, NC

iTrader: (1)

Garage List
Any update?
__________________
Current: 2018 Audi S3 IE Stage 1
Past: '08 Infiniti G37S, '87 Porsche 944 Turbo, '13 328i, '15 M235i, '15 F80 M3, '16 M235i, '15 335i, '17 X5 xDrive35i
@whoismorggan
Appreciate 0
Post Reply

Bookmarks

Tags
als, anti-lag, bmw 235i, bmw m2, braap

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -5. The time now is 10:48 AM.




2addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST