Came across this year-old thread and am reminded I ought to mention that Ellison Fluid Systems has been bought by an E-AB builder and entrepreneur based at Chino - Steve Glover, who I've known for many years. His company, NvAero:
http://www.nvaero.com/blog/ellison-fluid-systems/
****************
I bought my plane in 2006 with the engine/carb that it's still got. In almost ten years I've never once had to adjust, clean or touch for any reason my top-mounted Ellison. I took my heads off about four years ago to replace valves & springs and just clean things up. All piston tops and chambers were identical in color, as if the engine had fuel injection with perfectly balanced injectors. The spray bar on the Ellison creates a fine, even mist that, combined with tuned inlet manifold tubes, provide each cylinder with an equal amount of perfectly-mixed fuel vapor.
It has never once collected ice, despite my propensity for flying in conditions that are conducive to it.
I've had it explained to me but still can't remember how it does it, but the Ellison somehow automatically leans the mixture as you climb. It has a mixture control but I've discovered using it, especially at altitude, usually does more harm than good. The darn carb leans itself as you climb.
It's a Smart Carb
Linear Mode
