I realize this is a little late... but I just wanted to add that I had a 200cfm bugspray on my beetle and it ran awesome... It was a stock 1600 with a C35 cam and an 009.. oh, and an extractor exhaust w/ a sideways pointing glasspack muffler. I had to redrill the mains with a #54 drill bit (if memory serves me... I'm pretty sure it was a 54, I think we tried 53 first) and as far as the choke, I'm pretty sure I had it set to have hardly any coke at all when it was cold... (or it would flood indeed) However, it started pretty well without it. When starting it I did have to nurse the throttle for about a minute or two, but after that it would burble happily away. I did have problems with it freezing up when it was around or below freezing and humid though... I would have to pull over halfway to work and either blow on it, or allow the radiant heat to melt the ice. I eventually drilled a hole in the rear tin and installed some heater hose to duct hot engine air from behind cyl 4 and direct it at the body of the carburetor. It did get take a little tinkering to get right... but it ran exceptionally well. I drove it for 10 months while working 2 jobs, often driving almost 100 miles a day.
(edit: the carburetor had belonged to my coworker and I went over his house and salvaged it off an engine in the brush behind his barn and actually had to unstick it, disassemble it and glass-bead blast the steel parts, which were pitted slightly but not too bad. He also had one with larger valves, think it was dubbed the 300cfm version. and I had to use a spacer between the intake manifold and carburetor for the accelerator pump arm to clear the top of the generator)
the guy I bought it from asked me why I was selling it, and I answered "I don't want to drive it thru another winter" - and it was the truth. I had two lengths of aluminum preheater tubing running directly from where the hot air entered under where the rear seat would have been if I had one.. the Left one went under the driver's seat and sometimes I'd stuff it up my coat sleeve. The right one was by the tunnel and pointed up at the windscreen. Lack of heat was mostly due to aftermarket, non finned heater boxes and an ill-fitting hood that didn't seal well. sold it to buy an '89 jetta that I've been driving for almost 5 years and 100k miles.
