What Lehner

[captain harlock]

Do you get much more speed out fo it?

[Gustav]

Yeah definately,like a maniac.I'm talking about my little 1/10 cars there,a basic4200 on 3s (46K rpm),and a 1920/10 on 4s (45k rpm).I like the 1920 on 3s mostly,much more sensible,it's a blast on 4s though.I'd say the 1920/10 on 4s in my Losi MF2(1800g RTR) could top 60 mph if it had the stability,i'll find a long stretch and give it a go one day,the front end needs loads of ballast to keep it on the ground at full throttle though.I have to run 80g of weight on the front bumper on 3s to keep the wheelies controllable,still pulls them but i can catch it.

Edit;i guess the question really is which motor produces more power on the 3s,the smaller 4200kv one pulling 46k rpm or the larger 3100kv one pulling 35k rpm.Well the answer is definately the 4200,BUT it runs much hotter.It seems to me that anything under 35k max. rpm you're losing alot of performance compared to a higher kv motor on the same batteries,but over 40k rpm you're producing more heat and losing runtime.maybe it's due to lower efficiency or maybe it's just because it's producing more power at the same efficiency,i don't know but i like 35000-39000 max.rpm as a happy medium.

[captain harlock]

I appologize that I confused you with the question, but the first answer was the one I wanted.