Stop. You don't have a job? Even a do it yourself deal won't work then. You need some money to setup and tune the car, as if you try to half ass your way through you are going to actually cost yourself more.
I'm not saying that you will wreck it because you are 17, or anything else, I am saying going fast costs money, money that you don't have or make, and unless you like walking or have rich parents that will buy you another car while your engine is in 4 or 5 major pieces you are going down a precarious road.
1993 Notch HCI /1994 Lightning / 1973 F250 Hiboy/ 1986 Omni GLH /
1994 Cummins 3500 / 1997 Cummins 3500 /1980 F250 6cyl