It's been many years since I worked with SU's and, I have not done three, but I have done several race cars with two. The "standoff" you speak of is quite normal and I doubt you would like the performance even if you could eliminate it. My normal procedure was to us air horns that were just long enough to catch "most" of the visible standoff mist. On an MG or Sprite, that was something like two to three inches...it varied with displacement/cam/rpm, etc. Street machines always had an air filter and I assume the standoff problem was not as critical at lower rpm. On the race cars adding the trumpets made a big difference. Perhaps you could use a K&N type filter over them. Some things that come to mind Using different viscosity oil in the dashpots and or springs could and sometimes did help. The richer the mixture the more standoff and on these little engines the needles looked like "sewing" needles!!!

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