The 428i has the 4cyl turbo with 240hp. The 435i has the twin turbo with an underrated 300hp.
Car and Driver mentions it tested the 428i and got a 5.3/14.1. That is impressive. I have seen many 335i at the track and they usually run mid-high 13's. I'd be curious to see that 428i with a 4cyl of 240hp at the track!
Nice improvement btw with the tune. When my wife had her 2010 Lincoln MKT, I put a LMS 93tune in it and got at 13.3sec! I have videos of it killing a Mitsubishi Lancer Ralliart and a 2013 Jeep SRT on the 1/8 mile. EB engines are very responsive to tuning!
Thanks for the video