The reason you are getting an inch of head the first couple of pours is do do the 8 PSIG applied. You are reducing the amount of carbonation in the beer each time you pour. Eventually, you will have reduced the carbonation to the point that you have equilibrium with the 8 PSIG. The beer will pour fine. As long as you like flat beer! You can actually see this happening. Open and close the faucet and immediately shine a flashlight through the beer line above the keg coupler. If should see small fine bubbles slowly rising out of the coupler through the line. This is the gas breaking out of solution. This is, of course, providing you have not already degassed the beer. You can use this procedure on a fresh keg that has aclimated to your Sanyo. Raise the pressure in one pound increments each time you open the faucet. Keep raising until the bubbles cease. Be careful as to not raise to high. You will then impart gas into the beer.
Calibrate your thermometer in a glass filled with ice and then pour water on top. Repack with ice. Your thermometer should read 32 degrees F. If not, based on the style of thermometer you have, move the pointer to 32. Pour off two to three glasses (use same glass) of beer and take the temperature of the last glass. Try to adjust to 38F.
If you have a 2.5 CO2 vol. beer @ sea level @ 38 F use 14 PSIG or use the flashlight procedure above. Do not adjust pressure to control flow speed. Use the length of 3/16" line for this. Longer the line, the slower the flow. You have just been ripped! Good luck!
Scott Zuhse, Instructor
Micro Matic Dispense Institute