Rick6a
Well Known Member
I would encourage anyone using Van's stock "heat muff" to periodically examine the exhaust pipe it is attached to. When I removed the muff because it would not generate any observable RPM drop when carb heat was applied, I was dismayed at the deepish gouges worn into the crossover pipe it was attached to. TT 220 hours.
I replaced it with the more efficient Wicks muff. Obscured from view in this photo, it is attached to the crossover pipe directly behind the damaged pipe. I now observe at least a 30 RPM drop when carb heat is applied.
I replaced it with the more efficient Wicks muff. Obscured from view in this photo, it is attached to the crossover pipe directly behind the damaged pipe. I now observe at least a 30 RPM drop when carb heat is applied.
![vhypl3.jpg](/community/proxy.php?image=http%3A%2F%2Fi40.tinypic.com%2Fvhypl3.jpg&hash=ab579a44c533fa15e4da59f87d4ea1c0)