scottmillhouse
Well Known Member
Stock RV-7A with new Lycoming IO-360, Hartzell CS prop, 10 hours time since new. Very tight baffling with no air leaks. Oil temperature at around 180 so I think I'm getting good flow and pressure. What are others seeing for their CHTs with similar equipment?
I'm on information overload. I'm finding it challenging to do Phase I testing with my new engine. I'm reading desired CHT of 360-380 and try not to go over 400 and never over 450. Lycoming tells me not to worry unless it gets to 450 and that 430 would even be ok at cruise. I'm routinely seeing around 415 and have to manage mixture, power and airspeed to keep below that throughout flight even at 5500 or 6500'. Other than descent the only way I can get below 400 is low power and sometimes even LOP. Forget any pattern practice. A hot takeoff today after a 1/2 hour fuel stop saw 430 and climbing 300' above ground before immediate power and climb reductions.
I'm on information overload. I'm finding it challenging to do Phase I testing with my new engine. I'm reading desired CHT of 360-380 and try not to go over 400 and never over 450. Lycoming tells me not to worry unless it gets to 450 and that 430 would even be ok at cruise. I'm routinely seeing around 415 and have to manage mixture, power and airspeed to keep below that throughout flight even at 5500 or 6500'. Other than descent the only way I can get below 400 is low power and sometimes even LOP. Forget any pattern practice. A hot takeoff today after a 1/2 hour fuel stop saw 430 and climbing 300' above ground before immediate power and climb reductions.