Brief history, from memory, on the turbo era. The rules had a 2:1 ratio for turbo motors. Rule had been there forever, like some old law no one pays attention to. It was thought the ratio was so extreme there would never be a successful turbo motor.
Technology marches on, and Renault came out with a v6 turbo that had about the same power as the NA cars. And so it began.
The most powerful (short-term) car was a straight 4 (BMW) that it was said could put out at least 1000 hp in qualifying trim.
Each team had their own fuel chemist, coming up with all kinds of stuff that would kill you if you breathed it
It was said Senna would blip the throttle mid corner to keep the turbo spooled.