E-Revo dewalt conversion

I recently bought the brushed E-Revo and I love it but I've been reading about people blowing up the factory titans so I'm looking into a replacement motor. I'm not expecting brushless speed but a little more would be nice and although I've seen a lot of people using 14V dewalt motors I haven't found anyone doing it with the 18V motor. Since I have several of these already, I'm thinking that might be an option for me. Anybody have any advice?