1/10 buggy on 3s

[ilpufxit]

I just bought a Kyosho Laser zx5 and I'm thinking of running 3s. Here's the thing, I have a couple 3s 4000mah lipos but they are only 10c rated. If I'm correct, that means I can draw 40 amps. My question is, will the little buggy draw more than that on 3s? and second, what's an appropriate motor to use with a MM? I would otherwise probably run a 5700 MM motor on 2s.