ArdWrknTrk Posted August 9, 2020 Share Posted August 9, 2020 As far as icing up a carburetor, I think the absolute worst was the old Holley "visi-flow" one barrel with the glass float bowl. Those would actually ice up the venturii to where they would barely run at all and the only cure was to pull over and shut it off and wait a couple of minutes for the engine heat to thaw it out. Cycling the choke with the engine off would break the ice (choke was in the venturii) and speed things up. Before I converted Darth to EFI I had a few cool mornings where he would gradually slow down and go rich, followed by a sudden increase in rpm from throttle body icing, once the air preheat got high enough temperature it would stop. Li'l Red can be a bit persnickety in cold damp weather. 4180, 650 AVS or the 4160-750. But like you said, as soon as the exhaust manifold heats up the stove it goes away. I've never noticed her revving high because of venturi restriction. Link to comment Share on other sites More sharing options...
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