Thanks for all of the comments. Of course, I'm confused again. I've done research on this forum and found multiple references to the advantages of running the 7XL, which included better torque, more efficient running, cooler running AND longer runtimes. The longer runtimes is what threw me, because the 7XL is a 7 turn motor and in my experience, 7 turn motors DRAW CURRENT. I was confused, but figured that there must have been something that I just didn't understand, yet. Still, the max current rating issue was still hanging in the back of my mind. I hope that someone can shed some light on this issue.

As for the batteries, a single 4S pack would be the easiest for me. I've also been considering a 4S2P 6Ah pack. A 20C 4S pack should be able to handle 80A constant. The 4S2P pack should be able to handle the current draw easily. I was going to run MaxAmps packs, but they kind of dropped the ball on my last order. It seems that they are running behind on orders and the delivery time is kind of up in the air. I ordered two packs on the 18th and they were just shipped today. Maybe I'm spoiled, but that's too long for me. In fact, I don't even need those packs any longer. OK, I'm going off on a tangent now. Anyway, I might have to get the mount down before I settle on the battery configuration.

As for the gearing on the kv of the motor, I'm still thinking in terms of nitro engines turning at 40,000 rpms. I'm just learning that I don't have to spin an electric motor that fast. Are you guys just running the ultra low kv motors and gearing up?

What kind of speed could I expect from an 8 or 9XL on 4S lipo? Runtime on 4S 4Ah lipo? What about an 11L? Am I going to have heat issues with an 11L? Would an 11L have enough power? I need better acceleration than a nitro buggy with a hot engine (Novarossi 21-5) AND I NEED to be faster. 40 or 45 mph.

Thanks.