In this iteration of my work on the DSPORT Subaru WRX, the performance benefit of ethanol based fuel is shown, with a 100 horsepower gain on a basic bolt on setup after custom tuning. Key benefits of ethanol fuel are discussed, as well as vehicle preparation, and finally dyno charts show the massive gains.
![](https://i0.wp.com/www.innovativetuning.com/wp-content/uploads/2022/08/210-TestandTune-WRXE85-009-FlexFuelDynoHP.png?fit=1000%2C549&ssl=1)