Tips on carpet racing?

[mekios]

Hi guys, i am going to race on Petit RC on January so i am looking for any tips for my B4.1 +8. I haven't raced on carpet before, and getting a mid motored car is not an option, as we will never race on carpet in Greece.

I am looking more for a guide for carpet setups, not a setup sheet. I mean like : you need to add weight, you need to get stiffer springs. That sort of stuff.