Simon Hitchen
Well Known Member
Thought I’d share my cold weather mod.
Up here in cold Canada I was having issues running too cold. The engine has always run cool but with an OAT of 5F I was running at 280 CHT at cruise.
First I made a baffle to reduce the exhaust area and that helped so I made a couple of inlet baffles this morning to reduce the inlet area by 25 percent. I was concerned that It may interfere with the airflow into the snorkel but it seems to be fine. I’m now running 2400 rpm with CHT’s around 340F and oil temp at 180F with the help of an anti splat oil cooler shutter (mandatory for up here). I used existing screw/bolt holes in the front cowl so didn’t do any damage. If anyone knows of any problems with this design, please let me know.
Up here in cold Canada I was having issues running too cold. The engine has always run cool but with an OAT of 5F I was running at 280 CHT at cruise.
First I made a baffle to reduce the exhaust area and that helped so I made a couple of inlet baffles this morning to reduce the inlet area by 25 percent. I was concerned that It may interfere with the airflow into the snorkel but it seems to be fine. I’m now running 2400 rpm with CHT’s around 340F and oil temp at 180F with the help of an anti splat oil cooler shutter (mandatory for up here). I used existing screw/bolt holes in the front cowl so didn’t do any damage. If anyone knows of any problems with this design, please let me know.
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