flex fuel tuning

[kevin p]

Hi everyone,

I'm tuning a RX7 on Ethanol/E70. Do I use the AFR/Lambda target 2 for the blend? I tried using Fuel Table 2 but it didn't work.   

 

Map file and Log attach.

 

Thanks.

https://drive.google.com/file/d/1mw2pWIKlF35FMLSPI5cseM5_kZxXAKHe/view?usp=sharinghttps://drive.google.com/file/d/1z9WSudu_uFqMOACnZJ13EKYw5dNXlb8X/view?usp=drive_link

[Adamw]

Your AFR target 2 would be the target if you were running whatever fuel that you have set up as 100% multifuel blend.  So say for example E85 was the highest eth content you would ever run, then your multifuel blend table would be set up[ with 100% for 85% ethanol.  This means when you are running E85 you will be using 100% of the multifuel properties (Density, stoich, AFR target 2 etc), and there would be no influence from the main fuel properties & AFR target 1. 

In your log you are running 66% ethanol content, which based on the way your multifuel blend table is set up you are using a blend of 61%.  This means 61% of your fuel calculation is coming from the multifuel properties/Fuel table 2 & AFR table 2, 39% is still coming from the primary fuel/fuel table 1/AFR target 1.