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View Full Version : Gearing help please!

aussiebuddha
01-24-2007, 05:39 AM
Just installed a ss+5800 on my XL-5 pede.
Anyone knows what pinion should I use?
Spur is 86T stock
XL-5 stock tires
Maxamps 7.2v Lipo
Mainly run on pavement or short cut grass.
looking for speed mainly, but dont wanna overheat.

Thanks to all.
By the way, anyone has any links to faqs or documentation on gearing and gearing calculators?

papaweely
01-24-2007, 06:30 AM
Super Sport has a thermal shutdown - go for it! I run 15/87 to cut down on speed, and wheelie all day ...

aussiebuddha
01-24-2007, 06:53 AM
how does that translate into an 86 spur? sorry i suck at ratios

lecatpuke
01-24-2007, 07:57 AM
Smaller pinion or larger spur = more torque, less top speed (cooler motor)
Larger pinion or smaller spur = less torque, more top speed (hotter motor)

Your ratio is the spur teeth divided by the pinion teeth, typically multiplied by some constant for your motor.

The pinion has the largest effect on gear ratio. There really isn't too large of a gearing difference between a 86T and 87T spur, but the 87T will give you marginally more torque.

The higher the number, the more torque and less power.
86/15 = 5.73
87/15 = 5.8

But if you dropped a tooth on the pinion,
86/14 = 6.14
87/14 = 6.21

Bigger increases. You don't really want to push your SS to thermal shutdown, even though it's a nice safety feature. 15/86 is plenty safe and pinions are cheap--get yourself an odd set from 13-19 and you'll be able to accomodate every running scenario.

cooleocool
01-24-2007, 05:24 PM
15/86 should be close enough to 15/87...

Maxx-Damage
01-24-2007, 06:21 PM
Instead of makin another thread, ill just ask here. Im running a 17t misfit motor in my pede. I have a 87t spur and have the chioce of a 12t, 16t or 18t pinion gear. Which pinion should i pick.

monsterpede13
01-24-2007, 06:24 PM
i would run either 12 or 16, again depending on whether you want speed or torque.

you should NEVER put a bigger pinion than number of turns on the motor.. it is recommended to put a pinion 2 teeth less than the number of turns..

lecatpuke
01-24-2007, 06:34 PM
i would run either 12 or 16, again depending on whether you want speed or torque.

you should NEVER put a bigger pinion than number of turns on the motor.. it is recommended to put a pinion 2 teeth less than the number of turns..
The Titan 12T is an exception to that rule. The RTR comes 19/86 from the factory, and granted even that is about as high as you'd want to gear it (I don't know why they give you the 23T pinion), but anything up to 19T is safe.

monsterpede13
01-24-2007, 06:37 PM
The Titan 12T is an exception to that rule. The RTR comes 19/86 from the factory, and granted even that is about as high as you'd want to gear it (I don't know why they give you the 23T pinion), but anything up to 19T is safe.

I am aware of this, but he is not talking about the titan, he is talking about a different motor. The titan is an exception because it has a fan in the rear aswell.

anyways sorry to get off topic

lecatpuke
01-24-2007, 06:38 PM
I am aware of this, but he is not talking about the titan, he is talking about a different motor. The titan is an exception because it has a fan in the rear aswell.
Indeed, just trying to clarify for posterity's sake.

Maxx-Damage
01-24-2007, 06:43 PM
OK thanks monsterpede for the gearing help. Im gonna try the 12t first and see how hot or cool it runs, if it fails then its another motor good bye probably. If i had a titan 12t right now i dont think id be asking for gearing, id be using it.:) thanks though lecatpuke.

monsterpede13
01-24-2007, 06:49 PM
your welcome. it shouldn't fail with a 12t pinion, it should actual run pretty cool.. good luck

BACK on topic.. lol I used to run my novak at 16/87.. ran fast, wheelies easy and it ran warm.. not HOT, but not to cool.. lets say it past a 10 second rule. :-P

Maxx-Damage
01-24-2007, 08:09 PM
just ran it outside with the Duct tape snow proof method, which worked nicly. Motor stayed close to room temp due to it being about 28F.