MS19087
Well Known Member
Getting ready for first engine start on my dual P-Mag, IO-390 equipped RV-14A. I have timed the the PMags for 5* AFTER TDC as the IO-390’s normal advance is 20*. Brad from Pmag tells me i should set up with the jumper in. My understanding is that this will limit the advance to 34* - however the real total advance equates to 34*-5* for a max advance of 29*. Correct?
Question is do I set the maximum advance on the engine bridge to 34* since it is already physically advanced by 5*? I assume so. Also can anyone share their configuration for ADV SHIFT, MAX RPM and ADV LIMIT. In my case i assume i sent up as follows:
ADV SHIFT: 0* (since i already physically set timing 5* ATDC)
MAX RPM: 3050
ADV LIMIT: 34* (giving me max of 29*)
Is my thinking correct? Thanks
Question is do I set the maximum advance on the engine bridge to 34* since it is already physically advanced by 5*? I assume so. Also can anyone share their configuration for ADV SHIFT, MAX RPM and ADV LIMIT. In my case i assume i sent up as follows:
ADV SHIFT: 0* (since i already physically set timing 5* ATDC)
MAX RPM: 3050
ADV LIMIT: 34* (giving me max of 29*)
Is my thinking correct? Thanks