BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 5-Series (G30) Forum 2017+ BMW 5 Series (G30) General Discussions 2018 BMW M550i G30 - Boost Problems

Post Reply
 
Thread Tools Search this Thread
      09-12-2021, 08:53 PM   #1
MarcSigouin2017
New Member
0
Rep
14
Posts

Drives: 2008 335i
Join Date: Dec 2020
Location: Arnprior, Ontario, Canada

iTrader: (0)

Garage List
2018 M550i  [0.00]
2018 BMW M550i G30 - Boost Problems

HELP!!

I have a 2018 M550i xDrive (56,000 miles). I am drag racing this car with the following Modifications. Someone out here must have run into the same problem(s) I am...I hope:
  • Upgraded Turbos to Pure Turbo Stage 1
  • Catless Down VSRF
  • TMAP 3 Sensors (re-calibrated to allow more boost)
  • Bootmod3 - using Protuning Freaks for Tune
  • E30 Fuel
  • New MAF X2
  • N63 Cold Air Intake with Dry K&N Air Filters

The car runs 11.5 in the quarter at about 120MPH. My goal is to get the car to the 10 sec range.

What happens during the race essentially we are calling for 28 PSI of boost and only see 21 PSI range. Launch Control is used as it should. New Plugs, fresh oil etc. I spare no expense.

Why am I not able to get to 28 PSI of Boost?

Also, when I drive in Sport Plus around town and I give it hard acceleration in 1st gear, the car goes into Limp mode. I stop the car, shut it off and it starts up fine and I continue to drive. This has also happened in Comfort mode.

Any suggestions would be greatly appreciated!!!

Marc
Appreciate 0
      09-13-2021, 09:13 AM   #2
Joe-BMW33
Major General
Joe-BMW33's Avatar
7036
Rep
6,515
Posts

Drives: '18 M550i|'21 X5|'03 540i
Join Date: Apr 2021
Location: Boston

iTrader: (1)

Garage List
2013 VW Tiguan  [0.00]
2015 Infiniti QX60  [0.00]
2021 BMW X5  [0.00]
2003 BMW 540i  [0.00]
2018 BMW M550  [10.00]
You got a lot going on there in terms of modifications. Did you do them all at once or sequentially? If sequentially, start with the last mod done when the problems started.
When you have modified from stock that much, limp mode is going to be really hard to diagnose. Limp mode is to protect the car from itself.
__________________
2018 M550ix|Carbon Black|Dinan Modifications|2003 540i|Jet Black|M-Sport|2021 X5 Mineral White
Prior BMW's: 1987 325e|1993 740i|1998 740il|2001 530i|2002 745li|2007 750li|2006 750li|2001 530i|2012 535xi|
Appreciate 0
Post Reply

Bookmarks

Tags
boost, g30, limp mode

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 11:36 AM.




5post
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