i race with a guy who tried tekin's 4000kv pro4..it ran too hot all the time, hew couldn't get the temps where they should be..he got the 4600kv and the temps are down quite a bit..he ran a fan on the 4000 just to get the temps in the 160's..tried 3-4 different pinions..the 4600 has been running 140's with no fan..bigger can be a good thing..jmo, i've got a tenshock sc411 4600kv ordered..just waiting for it to b shipped
