Running 160-180 sounds a little cold to me, but if ya like the performance there, nothing wrong with that. As far as warming it up just run it around for a bit. Don't have to beat on it, or take it to easy. Just make sure it's fully warmed up before you begin tuning in the carb. As far as using hairdryers that's for a motor with a ton of pinch that won't roll over very easy when it's to cold.