Nice that you are trying with E85.
But thats not an easy one, espacialy on EGAS ME7...
Your Ignition is only +3° - you have to log alot more to have it right.
Having too late ignition with E85 can damage your system too, due to pre/self ignition. Which is terrible with E85 due to very high laminar flame velocity. Same for to early ignition. In general more dangerous than pump gas because it has burn stabilizer.
Your FKVVS is not calibrated well. It doesn't need to be touched at all for those injector sizes.
KRKTE is wrong for that injectors, TVUB needs to be higher (I think).
In KFWKSTT you have all possibilities because one axe is engine start Temp (tmst).
You don't need to change it that much for higher engine start temperatures (above E85 vaporization point).
Be aware of oil dilution!
KFFWL Address is sent to you by private message.
Good Luck.
Thanks for your help and support.
Not quite easy indeed, it was much easier with my previous SAAB but I got great support on this forum!
To give you some more information about my tune, my main target was to build sort of daily Flexifuel setup so this why I may have strange values in my bin:
- Iginition was not changed much from stock because I did not wanted to create issues with petrol and I was not looking for big "boost" by ignition. Butt dyno says it's OK but I did not think I was on risky area. Should I back it off to stock?
- TVUB: I simply used the spreadsheet from my injector dealers (IPD Usa which uses base DW injectors, I can attach the file here: I took the value for 4bar fuel pressure), I thought they got it right.
- KRKTE: I "guesstimate" by looking LTFT betweel fuel petrol and full E85 and find something in the middle to "adapt" within ECU range depending of fuel. I saw this method on the forum and seemed reasonnable to me but I could get wrong.
- FKKVS: As I read over the forum, many people keeps their FKKVS stock or put all 1 due to their linearity. I tried both but I I still got issues with idle STFT which was oscillating in a big range to me (+/-8% at max). I read that TVUB is moslty responsible for idle STFT issues but as I consider this as input from my spread sheet, I did not dare modify it.
So this why I end up with a FKKVS like with higher in lower pulse range because it seems to reduce my idle STFT oscillating range (but I agree, it may not be the proper way to do...
)
I have unfortunately not much device for logging (most used is CAN reader + torque) so I mostly rely on driving feeling and some performance measures.
My target was just to get a safe flexfuel tune for my car which I can use daily 365 days/year and if you a have any tricks I use to optimise it, I am always willing to try and learn !
Larry
