Scott Cable wrote: > > 3.) The air filter looks like it needs something to support it in the > center. Especially since you added a diffuser plate to the center of > the filter. From the way it is supported only along the top and > bottom, it concerns me that the combination of ram air and engine > vacuum could cause the filter to collapse, then get sucked down to > the carb and block off the airflow to the carb during flight....Not a > good thing. My suggestion is to add vertical "vanes" to the angles > that support the filter, or add an angle to the ram air diffuser > plate that is the same height as the filter... or some other method > that would prevent the filter from collapsing.
I agree. I've watched a "puny" little 3/4 liter inline 4 fold a K&N in half at full throttle. We fixed that problem with safety wire crossed over the carb side of the filter laced through the sides of the airbox and twisted tight. It was in a superbike airbox so we didn't have much room to work. > 4.) Please re-think the emergency air-valve. Adding it would serve > two functions: > a.) emergency air source if both valves are shut. > b.) Act as an additional source of cowling air if the heated air from > the muff is inadequate for conditions. Don't use a magnet, but > rather a very light helical, torsion spring to keep the valve closed > until it was necessary. If you hinge the emergency air flapper around > the existing ram air valve pivot, you could add an additional hole to > front of the airbox, and at least the emergency air source would be > filtered. How about a door controlled by a vacuum servo? If there's too much vacuum in the airbox for whatever reason the emergency air will open automatically. I'd put the intake for that air source somewhere hot just in case. -- Steve N205FT mystic...@swbell.net He who seeks will find, and he who knocks will be let in.
