I didn't care for the Tekin Pro4 motor that I ran for a while... it would tend to pull too much current and not only did I run into temp issues, but my packs would start to swell and needed to be replaced every 6 months.
I found the sweet spot with the HobbyWing 35656 SD 4000KV motor here:
https://www.hobbywingdirect.com/products/xrm3656sd
Be sure to watch the product review video in the link. The HobbyWing motor is not as powerful as Tekin (but that's actually a good thing) HobbyWing would prove to be more efficient which means lower temps, longer run time, less stress on the battery and actually better consistency, I was still able to clear large triples on the 1/8 track and the truck was easier to drive which made me a faster driver overall. Oh and my packs are lasting over a year without any signs of swelling yet