brushless 1/5 4wd conversion about to begin! couple questions.

[Ryu James]

Originally Posted by Jabe

You realy need to get it hardened... its very easy to do if you have blowtorch, just heat it untill it starts to go from red to white then drop it in cold water and thats it.
You might want that spur last longer than pinion, so it should be hardened.
I have hardened HotRacing pinions and those last just long as other hardened.

i dont think i have a torch that would turn this gear red. what kind of gas?