You may be right seedygreen, but I guess I should said I like to be more on the conservative side of things. I keep forgetting my moderate speed needs may not be what others are looking for. To me, 30 mph is the maximum speed I like to achieve on a very rough off-road track (with 1/8 eBuggy). I am, almost always, using (high gear ratios) very low tooth count pinion gears on all my RCs. Looking at Redcat's site, I see a 3300kv brushless motor as an option, so I could possibly assume the RC would handle that motor. Jumping from a very "stock" brushed motor to an all out powerhouse brushless motor would concern me. If OP has ability to tame the motor down with transmitter endpoint adjustments...great! Doing so, and how much throttle limiting is done, will add some heat to the ESC. No throttle EPAs...then pinion/spur gears it is to adjust top end.

One of RC's best friends (or something like it)... http://www.ebay.com/itm/Temperature-...p2056016.l4276