Gear ratio question

[steelo]

Hey everyone,

 

 

 

This may be a dumb question, but I’m considering lowering the gear ratio on the re-re Optima not necessarily for added top end speed but to reduce the amount of torque on the gearbox and belt drive. Right now, I’m running a 3500kv Reaktor system with a 2s and the amount of torque that set up produces kind of concerns me. At half to full throttle launches, the front end actually lifts off of the ground for a second.

 

Will putting a larger pinion cause less stress on the rest of the drivetrain? I know everything will spin faster, but my thinking is that it will at least reduce torsion on everything. If the car is too fast, I can always dial back my throttle EPA settings to 80%.

 

Lastly, I'm using a 'Flysky' radio for this model, is there a way to reduce the acceleration with a radio setting?

 

 

 

Thanks

 

[speedy_w_beans]

If you lower the gear ratio it will generate less torque, but on the other hand the motor will get hotter due to the increased load it sees.

Does your brushless system have any sort of punch control or current limit setting?  You can always increase the punch control to soften launches while maintaining the existing gearing to keep the motor cool.

[steelo]

Thanks,

 

That’s my concern, right now I’m using the Optima’s stock gearing and the motor is getting pretty warm. Unfortunately, the ESC is very basic and offers no programming functions to change the punch. I’ll have to check my radio’s manual tonight to see if there is a way to ‘increment’ the throttle a little so I can tweak the acceleration. I know you can use the exponential settings to make the steering less aggressive, but I don't know if that's an option for the throttle.