It is impossible to dispense a Coors Light at 8 PSI without a substantial amount of carbonation coming out of solution as you dispense. Although it will work once you have de-carbonated the beer enough as gas equilibrium has been achieved. Unfortunately, at this time the beer is flat.
The goal of dispensing draught is to gain a clear pour and preserve the natural recipe of carbonation the life of the keg. As to the Paulaner, find out what the carbonation level is in volumes. If it is to have 2.5 volumes as most ales and lagers do, at 38 F degrees liquid, at sea level - to achieve the above goals the pressure should be 14 PSIG. Four feet of 3'16" I.D. line for 128 oz./min. flow.
If you do not have 38 F degrees, this will not work. Calibrate your thermometer and be absolutely certain that your liquid temperature is 38 F. Change pressure one pound higher for every two degrees warmer and lower one pound for every two degrees colder.
Most beer tubing has markings on it which indicates the I.D. size. If not, check it with a tape measure.
Scott Zuhse, Instructor
Micro Matic Dispense Institute