Outperforming the CPU by too much

Hiya, I'm using Drafi5's carset, the Barcelona Update, and I'm using that for a full championship. I am racing as Mark Webber in the RBR but I'm out qualifying the McLarens and the Ferrari's. 4 races in and I have 4 pole positions. My race pace isn't as fast but I'm still a little to fast when you look at how Red Bull are doing in F1. I also outpace Coulthard in a major way. I score points, he languishes dowin in 13th/14th. Any suggestions as to how to make me less competitive or in other words make my performance more like the real F1

Increase the grip levels of all of the drivers in GP3 Edit by around 500.

I've got the same problem too. Even in hardest mode, I can start last in a quick race with a Spyker for example, and win the race within 3 laps and my fastest lap is between 0.8 and 2 seconds quicker than any other car!

How do you change the grip levels in GP3 edit?

You go to the performance section. Go to the Quick Edit section (at the bottom). Hit the minus button in the middle. It'll reduce everyones grip by 100.