[steamer]

Speed in hydraulic's can only be changed by two things, pump rpm and volume of oil. The pump is designed to give max cc at the max diameter hose that can be fitted to the pump output.
If you put on small hose it acts like a restriction in the circuit. Also to get max flow every hose from tank to pump to valve and back to tank has to be the same diameter or you'll have the same restriction in the circuit. If the pump is the same as what I think you have the inlet and outlet in 9/16" Dia. =1.767 sq. in. Sizing the hose down to 1/4" .785 brings you down to about 2.25 less volume than the pump can produce = slow cylinders.
I think if you up size all the primary circuit hoses to the proper diameter then you'll able to control it from there with motor rpm.
Hope this helps.
Rob