Quote:
Originally Posted by JackWood
Thank you both very much for the replies.
I tested as per sosidge's description and the slipper slips and the diff doesn't. But it still takes quite some force to get it to slip, so maybe my diffs are too tight as well.....
So how do you tell if your diffs are too tight or just right? Obviously these plate diffs don't spin like a bevelled gear diff, but exactly how do you set up the smoothness-to-non-slip ratio on them? Or is that all feel too?
Both diffs are set so that with the motor in place, but everything switched off, if you spin any wheel it only counter-rotates the opposite wheel on the axel, and doesn't drive any of the belts.
As a final note, I am geared quite low, with a 19T pinion, so obviously that is going to crank more torque through the slipper than it would if I ran a racing sized 21-23T pinion. Am I correct in thinking that if I gear up then it should produce less slip?
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In terms of not slipping, your diffs can never be too tight. But the rear diff can be set too tight in terms of rotation and it will mess up the handling, making the car very loose on power.
It sounds like you are not far off, essentially the rear diff should rotate quite freely by hand but should not spin. At the end of the day feel and experience is about as good a guide as you will get, I wish I could give some torque settings but there aren't the tools to do it! Front diff usually set a smidge tighter, certainly no looser (oversteer again).
You are right about the ratio affecting torque on the spur but I don't think it is an issue anyone worries about, gear for the track not for the slipper clutch!