I've got just over 20 hours on my plane today, all of the lower- end bugs have been worked out. Right now I'm having power drop off precipitously right at 6100 rpm- 22.6 inches of MP and around 70% power according to the EM2. This is around 130-140 mph IAS. The fuel injection Map shows a smooth graph at that point. I thought that there might be a timing issue so I tried advancing the timing about 2 degrees but that did not change a thing so I set the timing back where it was previously. I am seeing about a 180 f difference on the two rotors- I went to mode four to try to balance out the egts, but I could only effect about a 20 degree change. Rotor 2 consistently shows somewhere above 1800 F, which I tend to question. I'll re-check my calibration.   I have had the injectors cleaned and tested so unless one of them got clogged, that should not be an issue. Still, I should pull them and have them re-checked. I may have an issue with the EGT probes themselves.

 

 Down below 6100 rpm the engine is smooth as silk, but obviously there is an issue above that .

 

 

Brian Trubee

RV-4  13 BREW