1:18 motor

Hello all, I have a question. My brother has a rc18 with a mamba 6900kv motor. Runs very well but now its a 100+ outside here in Vegas. Looking for a motor that will fit and run way cooler, motor at 130-140 in just 2 min. I had ordered a 2200kv medusa for my 1:10 running 4s and my motor will only hit 120 running all day. If someone can help , all motors I seem to find are slightly to large and have high kv # . Will be running 2 and 3s packs. Thank you.