Which Controller for My Application?

So I wanna run a 22.2v system w/ a Lehner 3100XL (maybe the 2800XL) in my non-bling maxx (meaning, its lighter than stock :D ). My requirements are to go fast (just under 50 mph) on a big track for a long time (up to :30 minutes). Probably not an uncommon desire/request.

I'm definately going LiPo. I think the TP8000-3S4P (*2) is the ticket (22.2v, 8000mah).

I'm looking at the BK controllers. The 9918 for its price ($200 less then the next step up which is $400) *might* work for me. But w/ ambient temps in So. Cal @ 100F-110F I need a controller that's not going to faint, but I of course don't wanna pay for total and complete overkill either.


18120 - 22.2v seems like this controller will be at its voltage limit, what effect will running a long race have on it?

30120 - limited to 42000rpm? yuk

18150 - see voltage issue w/ 18120

30150 - limited to 42000rpm also.

I think I'd feel more comfortable w/ something like a "20120" that doesn't have a 42000rpm rev limit.


Not sure which controller I should get. Any suggestions?

tia