Seems that there is some carb heat discussion - Carb heat is essential esspecially with certain carbs. My ( and I emphesize that this is MY setup) is as follows. Corvair engine with a 35mm Aerocarb, No carb heat, filter inside a plenum box inside the cowl. The engine intake air come from the warm air off the bottom of the engine near the oil pan. First - the Aerocarb is NOT suseptible to icing as other carbs are due to its design. It is very similar to the POSA and REVFLOW. An ELLISON looks very similar but IS suseptable to icing. Ive had 350 hours on the Aerocarb and the only issues Ive had were a sticky throttle (fixed with stiffer cable and not reducing to idle after flying at full throttle - a vacuum issue) and I had some vapor locking early on - not actually a carb issue but reducing heat in the cowl area. I believe that since Joe Horton has an Aerocarb and had some symptoms similar to my early vapor lock symtoms that his repairs are to be in line with reducing the cowl heat.
Again - My setup - dont follow if you are not comfortable with it. Some Aeorcarb owner have a carb heat box but from what I have heard - never use it. The Aeorcarb does not operate well with ram air so steady cowl air, though warmer, work the best. Bill and 41768
