Wuau¡¡¡, thanks guys for all responses . i´m a litle clear ideas now.
My Gen-x, work well in asphalt, last year 2nd in Nationals, and for now i´m 1st in Nationals, here are not top levels drivers, but i feel others cars more easy to drive and setup, i need these, because i´m not have more time to training, i drive +1 hour, for race and the tracks always are a litle dirty.

Greetings, Luis C.