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Hi, found your site and enjoyed viewing some of the questions asked. I am now retired and had a Baja Bug built, more of a street Baja than off road. The car was built with dual carbs that were a pain in the butt. Is it possible to have success running a single carb on my motor? Thanks!
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1972 Volkswagen Euro 1302S Super Beetle Deluxe
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At an engine rpm of 5,500 RPM the engine will need a carburetor capable of delivering 360 CFM assuming a volumetric efficiency of 0.80. I suspect you have more carburetion than you need. Have you pulled any of the spark plugs to see what they look like? If you have to much carburetion your plugs will be black and have a generous coating of soot on them. If the fuel to air mixture is correct the spark plugs should be light gray or very light gray; no black soot.
Some of the carbs that are used for a dual card setup can flow 360 CFM each. I think the old Holley 5200 carbs will flow more than 300 cfm (cubic feet per minute).
If you want really good performance you should carefullty consider fuel injection, either throttle body injection or port injection. I am in the process of identifying what I am going to use for my engine. Megasquirt or Microsquirt are two popular options that seem to work well on our air-cooled engines. It is my understanding that Microsquirt will handle both the ignition and the fuel injection. The ECU (engine control unit) will make your engine behave so much that you will enjoy your car much more. With fuel injection you will just make sure you have injectors capable of delivering the correct volume of fuel when it is needed. No more screwing around with jets and carburetors.
 
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