Hello everyone, I'm looking for some help with tuning for e85 on a '15 Mustang GT. The car has stock injectors, but also retains the stock intake manifold. It does have the ford racing power pack 2 components (GT350 throttle body and air intake though). I've read there is enough headroom with stock injectors to support this.
I found a post in 2014, so for Gen1 coyotes, where the steps were enumerated by wbt:
1. Install 47lbs. injectors.
2. Adjust the AFR for e85
3. Set the WOT lambda
4. Adjust the borderline and optimum power spark tables.
The tables are obviously different in the Coyote gen 2, so I wanted to see if there were any additional tips. I have the Coyote Cookbook as my reference, but I find it to be sparse on suggested torque/spark settings.
I know the borderline/spark tables should be advanced to take full advantage of e85, particularly in the mapped points most used since OP is disabled by default. Is it safe to initially leave them as they are, and slowly advance them while monitoring for KR? I know I wouldn't initially get the performance benefits of e85, but it would be a good baseline.
I grabbed a F150 FFV tune from the repository and tried to look for changes related to FFV. Fuel wise, it looks like quite a few of the available fields are populated the same way that the F150 flex fuel is setup, with the obvious difference that the master switch is disabled. I noticed the Fuel > Power Enrich > WOT Lambda FFV is all 1.00, and the F150 is set at 0.875 - however I've also read that the Coyote likes to run richer, and I saw 0.85 thrown around.
The Spark > Flex fuel blending doesn't completely match the F150 (There is no 100% setting, but I'm guessing to simply duplicate the table to match.
The torque model > general > Ethanol Efficiency is also not populated, so I presume that would be copied from the F150 charts.
I see the FFV tables for IAT and ECT are not available, but the base values are very close and I'm guessing I could probably leave them alone since the settings at normal operating temp is identical? I know e85 has a harder time starting, so I could perhaps change the lower temp IAT and ECT table to mirror the FFV ones from the F150.
Thank you for any help you can give