XRAY - Model racing cars

Hello. The last sunday I had a very hot indoor carpet race stock 13.5. My motor was at 69ºC at the finish of every race. The grip was medium. However I lose a lot of power, and I don't know why. I had new tyres in the race (lrp 30X)

I think the reason may be:

- Very hot conditions
- Medium grip
- The last time I used the batteries was 12 days ago.

What do you think?

69degC is not that hot for a motor after a run.

Did the car get slower, or did the handling change?

Yes, is true.

The car get slower

Ones of the batteries that I used, I discharged them 12 days before (storage mode).

Are you using a fan next to the motor?

Is it a power loss you can see/feel or is it reducing speed of lap times on the timing chart through the race that you sare seeing?

Since temp is so low, how do you measure? It can make a huge difference to measure into the holes of the can so you really get the temp of the rotor and not the can outside.

I measure in the outside of the motor. Mmmm ok, I will measure in the holes of the motor. Thank you !!

and remember track temp and humidity also affect lap times, so your .5 sec loss might not be the car, if you comparing one weekends racing to another

Do you use additive? What type?
For how long?