Pinion gear + Losi xxx cr

[freemundo]

Guys,

Could some please help me with the following question. I has just bought a 6.5t brushless motor and I was wonder what T pinion gear I use should in my Losi XXX 2wd. I am running a 78t Spur

Thx

danny

[pugboy]

start small and work up until you've as much top end as you want, maybe as small as a 15.

I run 15/82 or 17/82 generally, sometimes up to 21/82 if open track and always has plenty of beans.

Chris

[Southwell]

Ill have a look later, ive fitted and forgotten about my motor, that includes forgetting the gearing :lol: I think im around 23.

[pugboy]

http://www.losi.com/ProdInfo/Files/10thSensoredmotorinstructions.pdf

[freemundo]

Thanks! Small the better seems to be the key!

spur 78 / 15 pinion * 2.43 internal gear ratio works out to 12.6 Losi recommends 12.5. So pretty close!

Thx for your help!

[tyreman]

Thanks! Small the better seems to be the key!

spur 78 / 15 pinion * 2.43 internal gear ratio works out to 12.6 Losi recommends 12.5. So pretty close!

Thx for your help!


I run 78/25 on my losi 6.5, unless it's a bonded rotor you will just cook the motor and speedo on your gearing

[pugboy]

Tyreman won't the motor be less cooked on the 15 tooth than the 25 as the motor will be spinning with less resistance and so has to work less hard?? :confused:

[pugboy]

...but you could gear up as they recommend 10.8:1 for the 6.5 rather than 12.5 (that's th 4.5 turn). IMHO you are better to start under gearing (i.e higher overall ratio) and then gear up rather than go large, then if the motor and speedo are not too hot then gear up a bit.

Just my view.

Chris

[Southwell]

Tyreman won't the motor be less cooked on the 15 tooth than the 25 as the motor will be spinning with less resistance and so has to work less hard?? :confused:

No..

[Southwell]

Im on 22 on std spur, i will be on 23 next time out.

[ashleyb4]

What make of motor is it? diffrent makes, need gearing diffrently. I run a peak 7.5 on a 78t spur on around a 24 25.

A

[freemundo]

It's a Speed Passion competition series 2 6.5 motor.

[Dunc]

I was running 78/23 with that exact motor - no problems with heat and gave good performance.

It's a Speed Passion competition series 2 6.5 motor.

[The Doctor]

I'm running 78/21 indoors on carpet (sports hall size track), which is about ideal. I should think I'll go up a couple of pinions for larger outdoor tracks though. A 15 pinion sounds way too low to me.

[Southwell]

I'm running 78/21 indoors on carpet (sports hall size track), which is about ideal. I should think I'll go up a couple of pinions for larger outdoor tracks though. A 15 pinion sounds way too low to me.

I run 22 indoors, it felt absolutely perfect at the Petit.

[freemundo]

Thanks for the the help guys! I have ordered 17 + 22 T pinion gear I will let you know how it works out! Thx again