How to modify the time that stacks convergence on Dell PowerConnect 8164

I've create a stack between two Dell PowerConnect switches 8164.
But i want to know if i could modify the times it takes to converge the converge time between them, i mean...i remove all the cables of stacking (so no conection between switches), and then connect them...it takes something between 3-5 minutes for full convergence.
Is there a customization here?
Regards!