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View Full Version : Pinion size with 6.5 Speed Passion

fmo
22-01-2010, 10:50 AM
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
22-01-2010, 10:54 AM
i run a 22 pinion:confused:
Adam Skelding
22-01-2010, 11:05 AM
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
22-01-2010, 11:06 AM
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
22-01-2010, 11:10 AM
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.:thumbsup:
footey
22-01-2010, 11:13 AM
i have nt had a problem with overheating and i dont even have hloes cut in the shell:D
Northy
22-01-2010, 11:15 AM
22t again here ;)

G
mark christopher
22-01-2010, 11:39 AM
22 for me
fmo
22-01-2010, 12:07 PM
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...? :lol:
freud
22-01-2010, 01:40 PM
22T with my 6.5 X12 Octa Wind :thumbsup:
telboy
22-01-2010, 02:45 PM
Same here. :p

There seems to be a patern. :D
carlin
22-01-2010, 02:47 PM
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
22-01-2010, 02:59 PM
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...? :lol:

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


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 :thumbsup:

G
carlin
22-01-2010, 03:42 PM
No he didn't, I built his car for him :woot:





Yes :thumbsup:

G

Thanks G
mark christopher
22-01-2010, 05:08 PM
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
22-01-2010, 05:22 PM
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