Really what have you done to the motor. In most cases they want to see how committed to showing the car and if you have won any events you have entered. You must remember when being sponsored you become an investment to the sponsor and how old you are how you present yourself will determine if you are successful
About 1 in 200 companies will sponsor you unless you have something to offer them.
I'm currently sponsored by 2 companies, www.Autobadges.com and www.extremeeffect.com .
I offer my services to both of them.
My first sponsor, Autobadges.com, owned and opperated by Erick (EVal), sponsored me after I kept getting him business for his emblems . Only after that happened have I gotten to know him, and he has become one of my Best friends.
My second sponsor is Extreme Effects.
Both of these companies are sponsoring www.v6stangs.com
But yeah, you have to give in order to recieve. Let them know what you can offer them, and that is always a good way to open up talks with a prespective sponsor.