There are those having trouble with thermal issues and not running lipo - Futaba addressed that issue with this - see #3 under vehicles -

http://2.4gigahertz.com/features/receiver-tips.html#car



From what I've read mounting the rcvr on its side, not using foam for insulation and keeping it away from heat sources eliominates thermalling fopr most. If you;'re trying to run in 110F ambient, it is a little diff prob.