BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Mporium BMW
Post Reply
 
Thread Tools Search this Thread
      10-13-2020, 11:43 AM   #45
Vedubin01
Second Lieutenant
174
Rep
214
Posts

Drives: 2013 E92 M3
Join Date: Dec 2019
Location: Houston

iTrader: (0)

Quote:
Originally Posted by MikeYQM View Post
Which tune do you have?

Alpine stage 2
Appreciate 0
      10-13-2020, 08:30 PM   #46
94jedi
Major
United_States
576
Rep
1,054
Posts

Drives: 2015 BMW M5 Competition
Join Date: Oct 2014
Location: United States

iTrader: (0)

I thought it was fairly well established that this was an issue w/ alpine stg 2 and forward x-pipes?
__________________
Alpinemss Tuned | MS Stage 2 Intake | MS Pulleys | Akrapovic Evolution Exhaust
Appreciate 1
      10-13-2020, 10:27 PM   #47
Powashiftin
Captain
147
Rep
939
Posts

Drives: E92 M3
Join Date: Apr 2010
Location: NJ

iTrader: (2)

Quote:
Originally Posted by MikeYQM View Post
Quote:
Originally Posted by Powashiftin View Post
I have the fully catless BW x pipe. No resonators - Paired with the Corsa muffler. Try it first and then mod it if you feel you need to. The setup sounds great but is very quiet cruising around town.
Do you have the torque dip/bog/hesitation around 2500 RPM? Which tune do you have?
Yes. Alpine stage 2 (burble) from 2019. I just got two new maps from Alex. Stage 2 and stage 2 with burbles. I'll be changing to one of the new maps after I swap out my x pipe, return to oem tune and pass inspection.

The real question is ... why is anyone hanging around 2.5k RPM?
Appreciate 0
      10-16-2020, 10:10 AM   #48
tdott
Colonel
1397
Rep
2,603
Posts

Drives: M3
Join Date: Nov 2010
Location: South FL / 6ix

iTrader: (3)

Quote:
Originally Posted by Powashiftin View Post
The real question is ... why is anyone hanging around 2.5k RPM?
For me, I don't notice it much driving on the street.

It is most apparent for me when launching the car at an autox event and trying to minimize wheel spin.

I try to get the car to roll off then hit WOT. So i'm in first accelerating and you feel right away when it hits ~2k-2.5k that the car stops accelerating for a split second then goes again.

If you just stab the throttle and launch it, it will just dump the clutch and light the rears up which isn't the fastest way to launch it.

This is a video of how I launch the car at an autox event. This was before my headers, so it doesn't do it in the video. Just giving you an idea of why it's a problem for some people.
https://photos.app.goo.gl/MAoB63yMamM7CwKn9

If I had video of it happening, you'd hear it sound like I lifted then hit the throttle again.
This is a video another guy with the problem captured on video:
Appreciate 0
      10-16-2020, 11:27 AM   #49
94jedi
Major
United_States
576
Rep
1,054
Posts

Drives: 2015 BMW M5 Competition
Join Date: Oct 2014
Location: United States

iTrader: (0)

^ yea, that little hiccup is quite pronounced.
__________________
Alpinemss Tuned | MS Stage 2 Intake | MS Pulleys | Akrapovic Evolution Exhaust
Appreciate 0
      10-16-2020, 07:43 PM   #50
tdott
Colonel
1397
Rep
2,603
Posts

Drives: M3
Join Date: Nov 2010
Location: South FL / 6ix

iTrader: (3)

Quote:
Originally Posted by 94jedi View Post
I thought it was fairly well established that this was an issue w/ alpine stg 2 and forward x-pipes?
It is an issue on stock tunes also.

Its not unique to AlpineMS plus he confirmed that his tune doesn't have any changes below 3k rpm. Some BPM tuned owners also confirmed it was an issue for them.

Epic does the BW header tune and claims to be able to fix this.
Appreciate 1
94jedi576.00

Post Reply

Bookmarks

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 04:13 AM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, 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