Players playing with a mouse and keyboard control their cars with buttons, which makes controlling the car linearly impossible. Is it possible to assign the controls to the mouse scroll wheel, for example, the throttle? This way, players (including me) don't have to force the engine so hard at all times. We can also drive more normally.
I've always used mouse Y-axis as combined throttle and brake with mouse steering. Invert the axis and maybe set deadzone to -0.1 to 0.1.