What brand of beer do you have? What elevation do you live at? What is the liquid temperature and there is no such thing as in between?
Five feet of 3/16" ID vinyl tubing will suffice. If your pressure is at 14 PSIG, the flow rate will be slightly slower than 128 oz/min.
Never adjust your pressure to control your flow rate at the faucet. The type of beer and the temperature of the beer dictates what PSIG you should use. You use the beer line to control the flow speed. Unless you can trump the laws of gasses.
Scott Zuhse, Instructor
Micro Matic Dispense Institute