410 Hot Hot Hot.. What pinions do you use?

[Maxbashing]

Hi all,

I recently bougth a second hand 410v3, I have fitted a 6.5t Exceed motor which I have used in another car previously with no issue. I went for a practice and found that after 5 mins of running the motor was quite a bit hotter than I would like.

I have checked and the drive line feels free and the shell has plenty of holes to create a flow of air. Therefore I'm thinking I must have it slightly over geared (to be honest it was pretty ballistic). I am currently running a 22t pinion and the 87t spur and was thinking of shifting to a 21t pinion and an RW Racing 89t spur. I'm increasing the spur rather than dropping to a 20t as I need to make sure the motor stays where it is as I'm really tight for space using my HW Esc.

Can I ask what gearing others are running? Does this sound about right or do you think I have some other gremlin causing my heat issues??

[nobby]

i have just got myself a 410v3, and i'm running a 6.5t hpi flux motor on a 24 pinion and an 87 spur.

i haven't raced it in anger yet, but i'm hopping i'm in the right ballpark.

you might be slightly under geared, which does make the motor run hot.

hope that helps.

[paulc]

I ran 22 or 23 87 in my 410 all the time (about 2 years) with a 6.5 speed passion v3 it did get warm but nothing to worry about

[av4625]

in 10.5 i run 23/87 and 6.5 21/87 do u no the actual temp? i dont have any airholes?

[/tobys]

I usually run between 22 and 24 pinion (depending on track size) with the 87 spur in my 410 on 6.5 and its fine. I work on the basis that if I can hold my thumb on the motor for at least 3 seconds after a qualifying run, then its OK.

Aggressive throttle action, lots of speedo timing/boost and ESC throttle profile can all contribute towards heat as well - try taming all 3 and see if it improves matters.

I have no experience of the motor you are running but it doesn't sound like its over geared (IMO).

[Maxbashing]

I am not sure what temp is was but I used the "can you hold your finger on the can for more that 3 seconds rule" method and I could (just) but it was cold outside so i would have expected it not to be quite so hot.

I had considered the timing/boost on the Esc if I'm honest it came with the car when I bought it and I haven't really done anything with it as it's was new when i got it. I pressumed (maybe more fool me) it would come with reasonable settings. It's a HobbbyWing esc so I will try and sort out reducing the boost a bit and see if can back the timing off a bit.

The fact that several other people seem to be running the same/higher gear ratios suggests that this is not the issue so I will investigate further...