Thanks for the tip BrianG. It was pretty balmy when I drove it, so I'm sure it helped. I do have it geared low (12T pinion...stock spur, not sure on tooth count). The 4600 always overheated in my slash running up to the 180F when I'd be forced to shut her down.
If the 4600 isn't enough for the crt, well that's a perfect excuse to get the SCT system for it, the girlfriend can't complain then!