I have a question regarding 2st engines. we all know that 2st produces twice as much power as 4st. That is why in motorcycle grand prix racing almost all constructors focused on 2st (back in the day of course) when classes were determined upon engine sizeses. It was natural that 250cc 2st would produce twice as much power as 4st 250cc. But why it never happend in automobile racing. Why manufacturers never produced 2st engines? Just imagine the power of 3.000cc 2st formula one engine, or 2.400cc 2st turbocharged indycar engine of the past. Also a question is, is it even possible to turbocharge 2st engine?