Choke Tower Carb without Air Cleaner Myth
This is an awesome book;
[ame="http://www.amazon.com/How-Build-Horsepower-Volume-2/dp/1884089143"]Amazon.com: How to Build Horsepower, Volume 2 (0601784000523): David Vizard: Books[/ame]
Lots of talk about air filters, cleaners etc in here.
I've heard that *all* carbs see reduced turbulence at the venturi with an air cleaner, choke tower or not.
Certainly rings would probably last longer with an air cleaner.