2ZR Turbo Yaris

[eTiMaGo]

Old-school is easier, sure, less variables to tune. But that also means less chances to improve power at both low and high-ends...

The 6-speed and LSD are more of a long-term wish. I'd really want the 6th gear for cruising at lower RPM. Due to the very tight packaging in the engine bay, I may not be able to fit the slightly larger transmission.

E85 behaves like very high-octane race fuel, in a nutshell. Increased detonation resistance is the main advantage, you can dial up the boost and ignition quite a lot.

I also personally like that it is locally-produced, so there is less pollution related to transporting crude oil, and it also burns cleaner than dino soup.

But it has some drawbacks:
1) 30% lower energy by volume. So you basically need to flow 30% more fuel for the same power output. Injectors and fuel pumps need to be sized accordingly (I'm looking at 1000cc injectors to have a bit of headroom), and a tank will not take you as far as regular gasoline.
2) Ethanol is hygroscopic (it slowly absorbs moisture). So, if you don't drive very often, youu may need to get your tank emptied and refilled. (Also a nasty side effect, the moisture eventually ends up in your oil, so more frequent changes are recommended)
3) Cost. In some countries, E85 is WAY cheaper than gasoline. Over here, it's only about 30% less than premium, so at the end of the day, your cost/mile is about the same

Anyway as you might tell, I am quite a proponent of the stuff

A nice little primer for the stuff:
https://www.youtube.com/watch?v=ltWcgiCm4NY