Do they have engine sounds?

I want to find some racing sounds to use for my son’s identifying ring when he calls my cell phone. He races and does very well, and I think that would be so appropriate for his ringer. I have found some sites which offer free ones but there is usually a catch to them. And I have found those where you pay a monthly fee. I haven’t decided what to do, I could buy ringtones outright I suppose. I was wondering though if you can make your own. There must be some way to do that, and I would like to find out how it can be done.