[jhautz]

You should be able to do 40 with no issue on 4s and that motor. If you want to go for crazy speed runs add a cell and run 5s. That motor will run on 5s all day. I run the 1940/7 wich is very siilar kv rating on 5s all the time and have no problem at all with it.

Also, anyone know why the rc-monster store and the lehner site list different kv ratings for the 1950 motors???? 2178kv on RC-MONSTER and 2090kv on Lehner site???

BTW: I'm in th same boat as you... waitng for the Lehners to show up. I'm trying to decide between the 1950/6 and 1950/7. My plan is to run on 5s most of the time. If I go with the 7 turn I could potentailly run 6s for some really crazy speed runs. Decisions.... Decisions.... I keep going back and forth in my mind I guess what I wind up with will depend on what is in my mind when the motors show up in stock, cuz I'll be ordering it imeadiatly.