Pinion size with 6.5 Speed Passion

[fmo]

I have been running my DEX 410 for the first time last weekend at an indoor meeting and realized motor temperatures close to 100 C after a 6 min run. The ESC was quite cool at approx. 40-50 C compared to the motor.

Motor is a Speed Passion V3 6.5, ESC is the Speed Passion V2 GT PRO.
Pinion size was 18 teeth.

What pinion sizes do you use in your durangos with 6.5 motors?
Can the motor overheat due to a small pinion?

Thanks for any advice,
Frank

[footey]

i run a 22 pinion

[Adam Skelding]

Same here I ran a 22T pinion on my 6.5T at the Petit.
I was nuts fast and only got to 75C in the car.

On a 5.5T I normally run a 20T.

[fmo]

Thanks guys!

Is it so that a pinion that is to small could overheat the motor, because the motor would almost everywhere run on full revs?

[Adam Skelding]

It could be.
The motor can overheat a little this way.
For short tracks I run my 6.5T on a 20T and 5.5T on a 19T.

See how you go with these.

Just check your transmission isn't tight or that you have a failed bearing somewhere.

[footey]

i have nt had a problem with overheating and i dont even have hloes cut in the shell

[Northy]

22t again here

G

[mark christopher]

22 for me

[fmo]

so - 22 seems to be the direction to go.

footey –*nice to know that you never had any problems with overheating and there are no holes in your shell, did you install a pinion at all...?

[freud]

22T with my 6.5 X12 Octa Wind

[telboy]

Same here.

There seems to be a patern.

[carlin]

Do you guys run 22t at Worksop?

I have been running 20t - 21t with X12 6.5t thats all.

Was thinking going higher but wasnt sure if it was to much

[Northy]

Originally Posted by fmo

footey –*nice to know that you never had any problems with overheating and there are no holes in your shell, did you install a pinion at all...?

No he didn't, I built his car for him

Originally Posted by carlin

Do you guys run 22t at Worksop?

I have been running 20t - 21t with X12 6.5t thats all.

Was thinking going higher but wasnt sure if it was to much

Yes

G

[carlin]

Originally Posted by Northy

No he didn't, I built his car for him





Yes

G

Thanks G

[mark christopher]

Originally Posted by carlin

Do you guys run 22t at Worksop?

I have been running 20t - 21t with X12 6.5t thats all.

Was thinking going higher but wasnt sure if it was to much

Yes but on x11

[Hulk]

You should quite easily be able to go up to a 22t pinion running a 6.5, even with an x12.

At worksop i run a 5.5 on a 23t pinion and have no problems with overheating. I even have the timing on the motor turned up to the max, im never satisfied with how quick my car is lol.

Craig Collinson