Any suggestions on a way to get more heat in my pa-12 with 100hp o235 engine? It's cold up here in MN!
Have you tried restricting the cooling air exhaust opening? This will slow down the passage of air through the engine compartment allowing it to get warmer. Some airplanes have cowl flaps for this purpose. You could use your duct tape.Looking for some input here on how to get more heat in the cabin from my 235 100HP. I have some pictures of my exhaust/engine. Yes, I have been testing restricting air through cowling to keep CHT above 300F since our cold snap of -10F here in MN is making me hanger stir-crazy.
Different exhaust?
Pa-12 lycoming 235 w/no oil cooler.
Any ideas or suggestions that don’t cost as much as upgrading to a 320?
That looks like a PA12 I use to know. Where is the intake air coming from to pressurize the heat shroud around the muffler? I think I would remove the fresh air SCAT hose to the heat box for winter ops.
I am talking about the SCAT hose shown on the right side engine photo that runs from a scoop on the bottom of the cowling to the cabin airbox. It is suppose to bring cool air into the cabin. When the heat is on cold air is still coming up to the box. The box doors leak terribly so I imagine the cold air is leaking around and effecting the heat output.How will you get flow if you do that?
Agreed. Get rid of the cold air vent tube. Also, the pressure/supply tube is coming from the front baffle and is now blocked by the inlet being taped off.I am talking about the SCAT hose shown on the right side engine photo that runs from a scoop on the bottom of the cowling to the cabin airbox. It is suppose to bring cool air into the cabin. When the heat is on cold air is still coming up to the box. The box doors leak terribly so I imagine the cold air is leaking around and effecting the heat output.
Is that Sutton on a 235? It’s very much different from my current setup with the muffler forward of the carb.
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You might want to contact the current owner of 3788M and ask him for pix of his system. If is still the way I built it, it goes from the cold air inlet to a warm air exhaust on one side of the muffler divider to an inlet on the other side of the divider and then out of a now very hot air exhaust into the cabin.
In short, I had the air circle the muffler twice before going into the cabin.
It worked great for me, but be careful not to put anything in front of the cabin heater--the air is hot enough to melt a battery.