I understand what you're trying to accomplish Robo, but I'm not certain it's possible in a 4 cyl. I know I questioned Trifecta a lot about an e47 tune for my GXP and it basically came down to the simple answer...there was no way to switch between e47 and a 93 octane tune for my car. I would have to drain the tank every time I wanted to switch and the tables were so precise for the e47 that if the mix was off by a 1/2 gallon either way the car wouldn't run good.... I was told later by a tuner at work that it's all or nothing with e85 on a 4cyl. He was a drag racer and used to tune the 2.0L Dodge turbo motors to run on e85 for drag racing. He told me to with a 4cyl, that tuning for both was impossible.... I will watch this this thread in case you find something because I would love an e47 tune in my car and over 400hp!! (can't use true e85 in mine...without different injectors or hpfp).
Ghost, the LNF (engine in the GXP) is a completely different beast than the LE5 (which is what I have). The ECMs are totally different due to direct injection (LNF) versus port injection (LE5). I can up injectors, increase the voltage going to the in tank pump, and run true E85. I can do that with what I have now...I just want to be able to switch fuels without hassle.
The E67 (model number of the ECM in the LE5) is used on other cars and has settings for flex fuel use. I can go into HP Tuners and actually switch on the Flex Fuel feature. The issue is with the Operating System (OS) that is on our ECM, that's the ONLY table I have access to. If you pull up the E67 for a 2007 Cadillac CTS-V, there you will find it has all the Flex Fuel tables you need to make this work. Problem is the OS on the Caddie is not compatible with the OS on the Kappa so you can't just write the Caddie tune onto a Kappa ECM and have it work.
I have been told that when you turn on flex fuel, you have two tables, the "regular" gas table, and what equates to a E100 table. There is a virtual way for the ECM to determine what fuel is going to the engine but I would rather use the GM sensor that monitors the fuel going to the engine and then reports this to the ECM to allow the ECM to "blend" the two tables together for whatever the alcohol content is going to the engine. That sensor just has to be pinned into the ECM (and I know what pin it goes to...woot!). It actually is pretty simple to add the sensor.
The hard part is changing the OS. Lucky for me I have someone that knows how to do that sort of thing. LOL I just don't know if his skill set includes this ECM. If anyone can do it though, it's him.
I also found a thread talking about EFILive and that they had created a tune like this for the 2007-8 HHR (uses same engine and ECM). They did it on that car because the 2009 HHR WAS flex fuel enabled but on the E37 ECM and the LE9 engine (not really that much different from the LE5...basically the same motor with some alcohol friendly parts). I have reached out to them as well to see if they did do that and what I would need to do to get an ECM set up that way where I could still tweak it. They guy I met on FB (putting the Kappa drivetrain into a Miata...LOL) is looking to do the same and has reached out to HP Tuners to see what they say. We're also checking their repository to see if we can find the elusive needle in a haystack where someone may have accomplished this and shared their tune there.
For those that may be reading this and don't know what the heck I'm talking about (because I know Ghost knows this stuff) when we talk about a tune on our cars, we are changing the data that goes into the OS, not the OS itself. What we're talking about here is a whole new level of modifying the engine management system.