What's the minimum temperature for breaking in a nitro engine?

[pug]

I got an engine I need to break in, but it has been pretty cold lately, what is the minimum temperature?

 

[Chubaka]

https://traxxas.com/support/Winter-Operating-Tips

doesn't say exact, but states that at 45° it may only heat up to 160-180° and how to acheive warmer temps.

Warm it up with a hair dryer and make sure she stays running hot enough for break in.

 

[Slick2500]

https://traxxas.com/support/Winter-Operating-Tips

doesn't say exact, but states that at 45° it may only heat up to 160-180° and how to acheive warmer temps.

Warm it up with a hair dryer and make sure she stays running hot enough for break in.

Use a beer koozie to wrap the head of the engine to trap the heat in. I've seen guys use socks too.