My BL Savage

[lincpimp]

I can say that the revo slipper is pretty tough. If you are going use it for acceleration limiting like 10th scale it will wear quickly. But if you are using it for gear/drivetrain protection you should be ok (slipper set reasonably tight). I have metalman's old revo with the slipperential and it works fine for me. I am actually going to hold off on my other revo project until the center diff with the integrated slipper is released. That looks like the most promising method to me!

Originally Posted by lincpimp

I can say that the revo slipper is pretty tough. If you are going use it for acceleration limiting like 10th scale it will wear quickly. But if you are using it for gear/drivetrain protection you should be ok (slipper set reasonably tight). I have metalman's old revo with the slipperential and it works fine for me. I am actually going to hold off on my other revo project until the center diff with the integrated slipper is released. That looks like the most promising method to me!

Thanks for the input. I'd like to be able to use that new slipperential, but I fear that the lack of extra spur gears/gearing options could cause a problem for me. I may just hold off to see how durable/how well it works though.

[lincpimp]

The lack of gearing is a good point. I will use an outrunner so I will have a slower turning, higher torque motor. The lack of gearing will not cause me too much of an issue due to that motor choice. The std slipperential with the added gear reduction works well. If I made one for myself, I would use a 46t diff gear, as it would affort more space for a similar sized spur gear, that would not contact the diff output on the slipper side of the assembly. I usually run 46t spurs (modified mgt spurs to fit the revo slipper).

I think I'm going to first go with a standard slipperential with a revo slipper, this will allow me to put the motor in a good distance above the driveline. It will also allow me to use a somewhat crazy idea to adjust the gear mesh (not having to move the motor to adjust it). I wish I could explain it with words, but I'll have to draw it to explain. On to Solidworks tutorials!

Just doing some gearing calculations, and I was wondering what I should aim for to be the final reduction ratio with my setup?

[lincpimp]

Not sure, what motor, batterys, etc are you planning on using. I usually aim for around 35k rpm motor speed, and 40mph vehicle speed. You are going to use the revo spur gears, correct? So you have 36, 38, 40t spurs and pinions from 25t down to whatever will fit without having part of the gear reduction assembly contacting with the motor.

I'm using an LMT 2240 14t (1057 KV) on either 8s or 10s lipo, 40 series Moabs. Using BrianG's calc I can get anywhere from 10:1 to 20:1 fairly easily, but is there a way to calculate the optimum ratio for my truck?