b4.1 rtr excessive motor heat

[Ryder666]

hey all first post and sorry if this has been asked before

i recently bought myself a few new turnigy 5000mah 2s lipos and using them in the b4 yesterday the motor got seriously hot.

is there any thing i should change to stop the motor over heating so badly

thanks

tom

[Toyman]

yes, change your gear ratio

[chickentikka25]

Some things to try, in order of preference:

1. Gear down!! Put a smaller pinion on, say 2 teeth smaller at first
2. Check the timing on the motor isn't high - if it's anything but zero take it back to zero
3. Check your transmission is free and not binding at all
4. Don't run the car until the Lipo cut out on the speedo kicks in. 5AH is a huge amount of capacity at the end of the day so you might just be running far too long. And it's not good to take Lipo's to the cut off point anyway.
5. If it's a brushed motor it will feel hot anyway - check the colour of the comm and brushes. If they're even slightly blueish then yes, it is way too hot

If you're still worried about heat and it's a brushless motor, buy a £20 temp gun from Maplins and temp the motor after you run it. My B4 runs at around 45 degrees after a 5 min run which is perfectly acceptable. In my touring car the motor would come off at around 130 deg!

HTH.

[Ryder666]

thanks for the replies

im running the stock reedy brushless 3300kv motor and xp450-bl esc

so all in all just tone the run times down a bit, im thinking of getting an ez-run setup for it are they any better than the stock gear?

thanks

tom

[grelland]

I am not sure I understand, but if you gear down, you will increase your run time, not "turn down" as you say.

Also, why would you want to change the stock electronics? What do you mean with "better than the stock gear"?

[Ryder666]

I mean don't run as long, and as to the eletronixs I meant more competetive as I'm looking to start racing in a few weeks

Thanks
Tom