David-aviator
Well Known Member
If anyone is sitting on the fence with regard to pipes, I just want to mention I am very satisfied with the Vetterman 4 pipe exhaust system.
On the last flight the batteries in my noise cancel head set gave up the ghost so it was like in the good old noisy days before micro circuitry and I must say not all that bad. Well, I won't say it was like you can carry on a conversation with your wife, but it was not as noisy as I thought it might be. The Subaru made a lot more noise with no muffler.
Another pleasant surprise was the availability of cabin heat in flight. I am using the 2" baffle exit aft of #3 and run the scat tube over to the #4 pipe where the heat muff is installed. From there it is just a short run to the cabin heat box/valve. At 8500' with the OAT at 37F, it was comfortable as it was during the climb.
With regard to ring seating, I checked the color of the inside of the pipes at the exit today. They are a grey color, not oily or black soot, but a clean looking dark grey. I think I am getting close....but will keep on running hard some more hours.
On the last flight the batteries in my noise cancel head set gave up the ghost so it was like in the good old noisy days before micro circuitry and I must say not all that bad. Well, I won't say it was like you can carry on a conversation with your wife, but it was not as noisy as I thought it might be. The Subaru made a lot more noise with no muffler.
Another pleasant surprise was the availability of cabin heat in flight. I am using the 2" baffle exit aft of #3 and run the scat tube over to the #4 pipe where the heat muff is installed. From there it is just a short run to the cabin heat box/valve. At 8500' with the OAT at 37F, it was comfortable as it was during the climb.
With regard to ring seating, I checked the color of the inside of the pipes at the exit today. They are a grey color, not oily or black soot, but a clean looking dark grey. I think I am getting close....but will keep on running hard some more hours.