M5POST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   M5POST - BMW M5 Forum > F10 M5 Forum > BMW M5 (F10) General Forum

Post Reply
 
Thread Tools Search this Thread
      10-23-2020, 10:27 PM   #1
GAM
Lieutenant
GAM's Avatar
39
Rep
471
Posts

Drives: 2014 M6 Gran Coupe
Join Date: Mar 2012
Location: Palm Beach

iTrader: (1)

Fuel Trims and AFRs

Hey guys, can anyone tell me what are the key numbers to look at on logs when it starts to be an issue (running out of fuel) on higher boost maps? JB4 BCM here with map 1 and 2 with 93 and oct booster. I’d like to understand the logs better and see what are the critical numbers. Thanks!
Appreciate 0
      10-24-2020, 08:50 AM   #2
ajm55
Private First Class
51
Rep
175
Posts

Drives: f10 m5
Join Date: Dec 2019
Location: south africa

iTrader: (0)

My LTFTs fluctuate between -10 and 10. I think that fuel trims max out beyond -20/20 but I'll leave it to the experts to guide you. My AFRs in stock form and with a flash will run from about 14.7 at 4,500 rpm to high 12s at 7,000rpm. My tune makes a good deal of extra power (about 65 whp and 150 nm) but not sure how this was achieved as the maximum increase over stock boost is about 2.5psi at about 5,000rpm while boost tapers off to the stock levels from 6,500 rpm to the top
Appreciate 0
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 05:26 AM.




m5post
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