Congrats. Look into an ECU tune, with a new set of plugs, and an intake. Or he||, as odd as it sounds, the "piggyback chips" even produce great results on these cars, like the Scorcher. Though that's mostly due to the fact that the factory ECU doesn't operate too far outside of it's parameters; unlike some cars that will adjust to, say, 91 Octane and use a more aggressive fuel map or even just advance the timing for a noticeable increase in power, these Gamma II engines don't do that. This is why you don't see too many threads recommending higher octane fuel for better performance, and the marginal improvement may not be worth the extra $$$ you're pumping into the tank. But the flipside is that the more static programming can help with more consistent results with either a piggyback or a straight up tune.
You'll get a significant upgrade in power and basically transform the car and feel closer to your old ST. You may not meet the power potential simply because you're down just about a half a liter in displacement....
But there's also more full N cars on the way from Hyundai, so, a Kona N may end up being a decent and more direct Focus ST replacement.
Last edited by Exeno; 05-09-2020 at 11:46 AM.