can someone look at my tune please? timing and fueling issue

[JUSTASBC]

I have a couple questions that I can not figure out. I am working with the truck in my sig. I recently switched to Injector Dynamics id1300 injectors. I installed the data from ID, and they seem to be working real well. The reason I went with the id1300's is that they are designed to be used with different fuels such as E85, and pump gas. E85 is not that readily available in my area, so I figured I would drive on the street on pump gas, and switch to E85 to go to the track. Today I put in about 30% ethanol, and it ran real lean. The sensor appears to be working properly for the amount of ethanol I put in. I can correct this by adjusting B3601 from 0=14.68 to 100=3 and filling the cells in with linear data. I just know this is not the proper way to correct this, and I can not figure out how to correct this properly. Or is this the best way to do this?

I also have a question about timing. My timing seems to be bouncing between 13, and 16.5 at WOT. I am not sure what is causing this, there must be something in the tune that I have overlooked. I go WOT around frame 580.

Any help is appreciated.

Daryl

1753017531

[darcy]

Looks like the ethanol is working ok by that log. B3601 is set correctly.

Why do you think it's lean? Are comparing Measured AFR to Commanded AFR - you can't do this if both one is pure gasoline and the other is an ethanol blend.
I'd switch over to comparing EQRatio and Lambda then you are independant of the fuel composition.

At WOT you command 10.0AFR, which for a stoich of 12.95 (30%ethanol) is EQratio of 1.3.
You measure an AFR of ~11.2, which if set for stoich of 14.68, is EQRatio of 1.3

So all is good on the fuelling side.

[JUSTASBC]

Sorry, that log is after I changed the injector flow and both VE tables. That was so I could show the timing issue.

[JUSTASBC]

Here are 2 logs where the tune was not changed. The only difference was adding alcohol.


1753917540

[JUSTASBC]

After work today I messed with this a little. I got thinking about it, and maybe the fuel injectors are not flowing what they are suggested to flow. When I removed my old injectors, and installed these I populated the data with the online provided data ID offers, but my truck ran very rich. I had to lower the main VE tabke and boost VE table to get it to run properly. Well when I put in ethanol, it was not rich enough making me believe the injectors are not flowing what they are advertised to flow. I decided to take 5% off the IFR, and add 5% to the main VE and boost VE tables. It actually ran pretty close. I would assume that it should not have made a difference, but it did. Was I thinking right when I did this? Or should have have went in the other direction?