Yep, real Flex Fuel. It is a fully implemented flex fuel solution, running on the stock DME! Dial your car in on pump (91-93oct), then E85, set the blending / interpolation curve tables, and be on your way. The benefits here are never having to reflash when changing ethanol blends again (or even worry about mixing the correct blend). Go from straight 93oct to 100% E85 or E98 on the same flash
This is up and running on a few IJE0S cars now and works flawlessly. There is still some more work to be done, and of course porting to the other ROM types will take a good bit of time. Some hardware details are in need of finalization as well. More to come on those items in the weeks to follow.
Some overall highlights and features of this accomplishment:
- first DME integration with a 3rd party sensor
- first large scale rewrite and modification of DME logic
- direct logging of Ethanol Content % in MHD
- separate blending / interpolation per table grouping
- seamless blending between maps for any ethanol content
I'd also like to give a big thanks to @Chris@CKI for his help in testing and flashing my countless revisions at all hours of the day, and also to @martial@mhd for assembly code and hex conversion help along the way! In case you haven't guessed, this will be a module available in MHD similar to M-Boost.
A thread is worthless without pics, right? The log was taken after a fill-up to a higher E content, and you can see the AFR target rising as E% goes up. 2017 is just getting started, and will definitely be the year of the stock DME