To answer your question for how they adjust timing / boost for flex content on OFT, "you can't". Flex fuel with OFT doesn't currently exist. Sure Shiv is working on it, but not a single customer car using OFT has it running right now. Its just not there, yet. And even when it IS there, he is re-purposing factory maps to replicate the flex fuel functionality. Until he or ztan is able to set up custom maps, OFT doesn't even come close to Ecutek from a tuning perspective.
Ecutek makes this easy. You build a reference map for E% by rear o2 voltage, then use that as your reference to tell the car how much fuel to put in. Its all done by selectable options in Ecutek. Mine is set up exactly as Ecutek recommends in their docs, but picture below. Its super easy to implement the base flex fuel functions in Ecutek. Save yourself a ton of headache and just go Ecutek if you want flex fuel support.
Regarding boost control, same thing. You take engine RPM and E% from your initial rear o2 to e% map, and set that up in a custom map to set the CPC duty percentage. You have CPC going to a boost controller, so your CPC duty is your boost control percentage now. You can save a map by referencing rear O2 directly versus wasting a map on determining E%, but that is a different discussion.
That is just the start of it. So many things are possible with Ecutek's custom mapping. The only thing I dislike is that you're limited with how many custom maps you can set up. You can reference values from many different things to use as inputs to your map. Here is a taste, below is everything your Ecutek tuner can reference to create custom logic and safeguards in your tune as @
ptuning described.
Your front and wheel speeds don't match? Set up a custom map using these inputs to modify timing, boost control, etc to reduce power output. Scale your map so that the more you spin, the more timing / boost it pulls, and once you're not spinning the logic is ignored again. You can even set thresholds so the logic isn't applied immediately and is delayed. This is just an example. Ignition traction control isn't ideal, but again, different discussion.
I promise this isn't an Ecutek sales pitch. When it comes to down to keeping things running right, Ecutek simply shadows OFT in comparison. A good tuner can utilize Ecutek to limits far beyond OFT will ever reach. I'm a mostly DIY tuner, who started off on this car using a tactrix cable to flash the OFT maps edited via RomRaider. Once I got my feet wet I switched to Ecutek as the benefits are just so vast, it doesn't make sense to not use it. Unless you're going standalone of course.
