swap 3-screw SU set for 4-screw?
I recently posted about the differences between the 3-screw and the 4-screw SU carb sets that I have, and I have a new question. Someone recently pointed out that the 4-screw carbs are easier to adjust becuz the 3-screw carbs have part of a linkage bar that protrudes out over the float bowl covers thus making it difficult to remove those covers for cleaning or adjustment. My car is running on the 3-screw carbs, it runs well enough but the back carb is fouling all three plugs and the car smells
Some SU tips: As mentioned prior, first tune up the car (adjust valves, synchronize the air flow through the carburetors, check for vacuum leaks, etc.). With the air cleaner off, and engine idling, you can reach a finger into one carburetor and slowly lift the large vertical suction piston. Lifting it all the way up disables that carb at idle (the vacuum across the fuel nozzle drops to atmospheric pressure so no more fuel will be drawn out). This makes the engine run on just one carburetor (th