[Mdipinto]

Look. You dont tell us who is paying for the car... so still.
if its your car and they are paying for it, they have some right to say no, deal with it. You wouldnt like for them to take your xbox to a party and somehow it brakes.

all seriousness, tell your mother is better than street racing. Tell her to go to the strip with you. Maybe to do a run... you can't force her to let you do it, but. You can persue her in the benefits of it. In which dragstrip is not that much. I would recomend autocross, but that causes dings from cones!

my advice is make the payments, pay for insurance, maintenance and gas. And then you can do what ever you want. Mommy can't say a thing to stop you.