The type of battteries I am looking at right now are 2 4s1p 4250mah packs rated at 18-27c (hyperion lcx). If I connect them in parallel I get 4s2p, 8500mah, 153 to 230 amps?

Please correct me if I'm wrong. But that shouldn't that be sufficient?

I'm going to use a MMM. And with a 8xl looking for 40mph.