Yeah, i think that they would be rappid fast on a good 4S lipo! if they solved their thermal problems, it should be a nice setup.

My emaxx takes 14-1500 watts getting to topspeed, that's with the 7XL on 5S lipo's. I remember seeing the hvmaxx movie of harald-hans on 4S. it jumped from it's place. it was very agile. that was with the old HV-maxx. 35-38 mph with no thermalling and long runtime is more than enough for on the track.

Plus this HV motor is relative light.

Yea, I think it would be great for most racing... Most being the key word :005:. I think the HV 6.5 would be awesome on 5S LiPo. 2S on the BEC side, or use an UBEC. I think it could handle it. About like the EVX can be modded easily to accept 18 cells...

i bet the new price of an hv 4.5 with esc would cost about the same amount as a 8xl with a quark 80B. IMO i like the new 4.5 but the fiego c xl motors intrest me more.

does it come with an esc even???

have you seen anyone selling them on ebay yet????