I posed this question in my build thread but will ask here too (to cheat and maybe get more views/answers?).
I cannot justify buying a new, bigger motor. So I will install forced cooling. I am thinking of using a marine bilge blower like this:
Bilge Blower Buy 1 Get The Second 1 Free 12VDC 3" Opening | eBay
It is 12V, 3A, 90 CFM. EVSource has a similar one that puts out 105 CFM but for a lot more money. But I can't decide how I will switch this fan on/off. Two options I am throwing around are:
1. Epoxy a 165F (or so) thermal switch to a brush. The cooling fan will turn on once the brush reaches 165F and turn off if it drops to 15F below that.
2. Switch the fan on/off with my [currently unused] pot box idle microswitch. The fan will turn on as soon as the accelerator is depressed. This is a much simpler solution, and the one I am leaning towards.
Which is the better option??