Exit speed is everything when it comes to being fast. At most, if you take a corner absolutely perfectly you might gain a tenth on another fast competitor. If your corner exit speed is 100 km/h, you gained roughly 2.5 metres or half a car length, which is a pretty big gain on a corner if your opponent doesn't screw it up. If your exit speed is just 3 km/h lower than his, you will lose 0.85 metres/second on the following straight, so if the straight is longer than 3 seconds or around 120 metres, you will begin to fall behind. But the real key is rotating your car the best way to get on the throttle earlier than the other guy combined with a higher exit speed. If you exit that same 3km/h faster and get on the throttle just 1/10th of a second sooner, you will blow by him before the next corner because you'll be travelling perhaps 6-7 km/h faster or more, down the entire length of the straight, gaining more than 2 metres/second.
I'm not an alien by any stretch but I do have a lot of online racing experience, and by far the biggest mistake sim racers make is pushing too hard entering the corner, getting off the racing line or just generally out of shape, and being late and slow exiting the corner.
By the way, if your exit speed is
"impotent", I'd see a doctor

Click to expand...