A better motor such as the Neu will help w/temps. for sure..Many people have used the 8xl and most have had heat issues. Medusa has a 70 series motor you might check out.....
http://www.rc-monster.com/proddetail...0&cat=20....on 4s, go with the 2200kv...on 5s go with the 1600kv...The 5s set up will be the more efficient set up...If you are running 6s...even better!
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S