Joel647,
My first exposure was on my own bike, a heavily modified ZX-11 with just a tad over 170 hp on my Dyno. Although the bike had great power and was impressive in all areas of haul-ass down the highway exploits, I was generally disappointed with the bike's in-town, low speed behavior. Most, if not all the problems focused around the FCR41's. I spent months tinkering with different needles, jet sizes, float levels, etc. I also followed very extensive tuning procedures and all of this with my Dyno to confirm proper ratios. I was even considering going back to the OEM carbs, as I knew they behaved much better in general operation. I even read something by Kevin Cameron explaining why ‘your big racing flat slides will never be as sweet as the OEM units’ for around town riding. As a last resort I gave the Flo-Comm a try. What could it hurt, right? That had to be one of the biggest surprises in my entire motorcycling career. The carbs instantly performed beautifully. They went from one of the worst set-ups I ever had the absolute best. That particular bike picked over 10hp at only 5000 rpm. Even the big bore kit, headwork, supercrank, all paled by comparison. It had an almost electric motor feel. It fixed problems I didn’t know I had.
With what I have learned since then, my rather large FCR’s benefited greatly from the Flo-Commander by having far better atomization of fuel. I think that at lower speeds the fuel was just sheeting along the floor of the carbs and contributed little to proper combustion. All carbureted bikes benefit by eliminating this same situation, although, exactly as you suggest, some more than others. There are also a lot of folks out there that will never believe in the Flo-Commander, fuel injection, computers, or higher education. Anything they don’t understand gets an automatic thumbs-down. I assure you that they do indeed work. I've installed probably a hundred or so and nearly all have been 'extremely' excited about the improvement. So far, I have had one installation where the owner claimed he couldn't tell any difference. Hopefully I'll get an opportunity to work on that one again. At the time I did not have a Dyno or any way to truly sort it out. As far as I'm concerned, the Flo-Commander should be standard equipment, right along with a good pipe, and a jet kit.