JB4tech.com - International Turbo Tuning Discussion
Mike_L's Avatar
Mike_L Mike_L is offline
Posts: 2,132
Join Date: Jun 2014
Car: 2022 X3 M40i
Default Max E85 on B58D - 06-10-2022, 10:40 PM

Anybody know? With E85 costing a fraction of premium, Iím wondering what it would take, or if itís even possible, to run my 22 X3 M40i on straight E85? I know stock the manual says up to E25. And supposedly the 22s arenít flashable without sending the DME to Russia so a backend E85 flash isnít happening. So are there any other options to allow a greater percentage?

Mike Levy
2022 Black Sapphire X3 M40i
2010 Glacier Pearl Nissan Murano SL
Reply With Quote
Tips000 Tips000 is offline
Junior Member
Posts: 31
Join Date: Jun 2022
Car: 2021 supra
Default 06-11-2022, 12:05 AM

Max ethanol content will be different for each car (and changes with temperature).

The best thing you can do is get a good map on 93, then start mixing in e85 until your trims start hitting close to 45.

If you get to a mixture of e30ish if your trims are still below 45 add boost (go up a map or increase settings in your custom map)

IMO a fuel it sensor is 100% required.

I have a Supra, I can get about 20psi at e25 and have decent logs but fuel trims are close to maxed and when it gets colder than 55* outside trims max out which isn’t ideal and can lead to lean AFR.
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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

Forum Jump

vBulletin Skin developed by: vBStyles.com
Copyright © 2007 - 2022, JB4tech.com