Top speed race class

[SpEEdyBL]

Two 5700s will will do it. If one 5700 is enough to push a 5bl truck to 65 mph, two 5700s will be able to push a 10lb to the same speed even easier since there is less than twice the wind resistance. The velineon motor btw is closer to a cm4600 motor, so that is not an alternative.

I recommend that you DO NOT get 6xls or 7ls or you will need twice as much batteries. Batteries supply the power. NOT the motor. Also you want to limit the rotational mass as much as possible.

Also, when you decide on batteries, try to get the biggest cells you can without having to put them in parallel. For example, two 3s1p 5000 mah packs would work better than two 3s2p 6000 mah packs.