One other thing to look at if you are having slow Acceleration is restriction in the fuel system.

First thing to check is the filter. On a new fuel tank and UAT system there can be micro particles that will block the filter after a couple of runs of the engine. The next thing to look at is the fuel lines and tubing you are using out of your fuel tanks. I have found that the 1/8 diameter brass tubing is too restrictive. I use either 5/32nd or 3/16th diameter on all my pick up lines and vent lines Including the vent line to the outside of the jet. It is a little more difficult to get these to go through the fuel stoppers but they will go through. One more note with the vent line, be sure that it is not too close to the top of the fuel tank. If your are using the D-Ubro or Sullivan tanks they too can be sucked down and block the vent line. Not too much of an issue with the Fiberglass tanks but be sure not to get the vent too close to the top of the tank as you can cause restriction there too. I like to put a short piece of fuel line on the vent inside the tank and let it run parallel to the top of the tank not 90 degrees.

Also the clunks on a lot of the ARF Kits are not drilled out for proper pick up I drill mine out to 5/32nd. One more thing is to make sure on the Inlet side of the Fuel pump (suction Side), is that you have a some what rigid fuel line from the UAT to the fuel pump. Too soft a line will tend to want to suck shut thus causing further restriction.

Hope this helps
Joe Lewis
Kingtech
K-80 and K-140
Owner