XFI with E85 question

[JDEstill]

Just to be sure, could someone confirm something for me? I'm starting to look at an XFI controlled car that is running E85. If I set the Fuel Energy Constant at 0.680 for E85, then what should I do with the air/fuel ratio table? Does it get the appropriate E85 AFRs (i.e. I specify 10.0 if I want it to be at stoich), or does the table get the equivalent gasoline AFRs (i.e. I specify 14.7 if I want it to be at stoich)?

I'll be logging lambdas once it is up and running, and that will of course tell me for sure which approach is the right one, but before I get to that point I was hoping someone could tell me for sure which approach is the correct one. Might save me a little time and effort.

Thanks!

John

 

[HighPSI]

The table changes automatically. You should just have to trim it a little in certain areas. The values will be actual A/F ratios for E85 not gasoline ratios. I would also increase your cranking & AE fuel tables.

 

[JDEstill]

huh, so it does. I wasn't aware that the XFI did that. Thanks Cal.

John