We run my #1 son's car at 6.08 fdr ( kawada vx-r) rollout approx 32mm on hpi sprint on a fairly open asphalt track ,straight about 60mtr long with easy infield, maybe 130 mtr total length.I'm guessing as it is a carpark track and slightly different every week .This motor runs a bit hot and has less runtime than #2 son
We also run #2 sons car at 6.11 ,(kawada vx-r) in an xpress jnr with same approx rollout 32mm.It isnt as hot after 5min run.
(Both of these cars are capable of comparable times as others running in our 12t class).
It is when we change to either yokomo t-max LT or LR motor( we have both) that the heat difference becomes noticeable.
I have noticed that both yoko's use laydown and the kawada standup brushes. Maybe that has something to do with it or maybe the ceramic bushes in the yoko are tighter and take more running in?Or does the yoko just prefer to rev higher?.
Anyways thanks for your replies and keep up this informative thread.