Don't be alarmed by Ed's unnatural fear of carburetters. The Wright Brothers figured it out. Actually they had a copper tube peeing into an open topped pipe. No float no complicated emultion tubes, no jets. And they also made every other part of the engine themselves. If there had been an FAA back then, we would not yet have the airplane.

 

The size (52) is of no importance. That is the bore size of the butterfly area and gives you an idea of how much the maximum flow might be (real big in your case). The size you look at is the choke size, or venturi size. In Webers it is changable so the carb can be used for a range of engine sizes. If the choke is a real Weber part, the size is molded into the top it and is visible from the inlet end of the carb. 

 

So, the choke size and the jet size go together. You need a wide band (heated would be best) 02 sensor. You can tune wide open power with an EGT gage, and will need one or two eventually for cruise tuning so you might as well get those installed. If Ken gives you jet sizes, install the same chokes he has or the jet sizes will be meaningless. Fuel pressure no more than 3.5 pounds. 

 

And buy an inductive probe timing light. One of those old ones that has a clip stuck on a spring between the plug and plug wire will make you part of the circuit with an MSD ignition. 

 

 

Lynn E. Hanover

 

I speak Weber