Nice! Did you notice that the game FPS is capped in settings at 60 FPS?
You can click the white helmet in the main menu to get to the configuration screens
Did not recognize the settings menu which is very nice. I set the fps cap to 120 in the config file, ran a race, quit and had an average framerate of 83.
Great! That's more or less what I expected, about 3x of my Rpi3 FPS