cropdusterdave
Well Known Member
Newly minted RV-7. Setup is Lycoming O-320 160 HP with a Sterba wood combination prop and Dynon skyview. Full power static run-up us only showing 1650 rpm. Pulled back a bit in cruise 1400 indicated gives me a decent cruise speed (140 MPH) and 7.5-8 GPH burn. Wide open in cruise maxes a little less than 2,000 RPM. Knowing that most folks will cruise around 2200 RPM makes me aware that I am at least displaying low RPM. Audibly...the engine sounds like any other O-320 I've flown behind. I'm wondering if I may have a sensor issue. Another clue....when I kill the rt mag on the run-up, the indicated rpm drops from 1600 all the way down to 600. It's definitely not dropping that far, however. It sounds and behaves the same as when I kill the other mag for a 200ish rpm drop. I hired out the wiring...so I'm not savvy on the intricate details on that. Any ideas or tips would be greatly appreciated!