[aeroace]

Don't buy Webers. If you are having trouble tuning two Holleys, you'll never get four WEBERS working right. Get a vacuum gauge, mount it (temp.) in the cockpit. Observe vacuum at idle, cruise, and wide open throttle. You must tune the holleys: jets, powervalves, accelerator pumps, and secondary springs. The power valve should open at about 2" of vacuum less than cruise or idle's lowest vacuum. The jets are tuned by reading the sparkplugs after a full throttle pass through four gears without any idling after. The secondary springs should be the lightest you can get away with without feeling the transition between the primaries and the secondaries. If you can feel the secondaries "kick in" what you are really feeling is when the motor flows enough air to catch up with the over-carburation of having the secondaries already open. Put in a stiffer spring. The vacuum pots ot both carbs should be linked together with a vacuum line also, above the diaphram. The accelerator pumps are there to prevent a lean condition between when the throttle blades are opened and when fuel is pulled from the boosters. This lean condition causes a "pop" when the throttle is hit. If it doesn't "pop" when you hit the throttle, forget them, tuning them exceeds what I can explain here.