I need a gear ratio of 14 for my Oxy 3 using the 10T motor pinion. However the Spirit tops out at 12.7. How do I increase it? Also, how do I get max rpms over 4000? Thanks.

This limits are common between governors. If the value is so high, it mean that the performance will be not optimal or either RPM very high. So the limits can't be exceeded. It will be necessary to put there pinion with less tooths, so both issues can be solved.

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Spirit System developer

Can the 12.7 ratio and 4000 rpm limit be exceeded? Some guys run 5000 rpm on their Oxy3.

Does this also mean I can't use the Spirit governor with a 10T pinion gear with the 140T main gear that comes with the Oxy? That gives a ratio of 14. Mr. Mel's calculator says for my desired rpm of 3500 with a 6S 2500kv motor I need a 10T motor pinion and a 14 ratio. Thank you.

It is possible by using simple trick, that you will just change Sensor Divider value. Then it can work exactly as with gear ratio you wish, because result will be same.
How many motor poles your motor has?

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Spirit System developer

6 poles on the motor. Divider is 3. Thank you.

Bump... What's the trick?

Would it be difficult to add higher ratios and rpms in the software?

How does this work? If I change the sensor divider from 3 to 6, what happens?

Sorry for the delay.

When you increase the divider value, then RPM that you will see as the Current RPM is divided by 2, because 6 / 3 = 2.
Then you can just set Max. Head Speed RPM to the max head speed that is acheivable with your model / 2.
And then it will work as you wish.

It is also possible to not use 6, but for example 4 or 5. In this case it will be 5/3. RPM control might be more precise.

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Spirit System developer

Thank you for the response! Can the software just be updated to accommodate more range of ratios and RPMs? Thanks

In the future it is theoretically possible. We will see what we can do.

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Spirit System developer