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Old 12-13-2019, 02:39 PM
mmcelrea mmcelrea is offline
Join Date: Dec 2008
Location: Northern Ireland
Posts: 12

The rpm is sensed by the g3x from the digital tach signal output on the pmag. you can hear that the rpm is fluctuating and garmin pilot shows the fluctuations. I will probably change the restrictor or add a smaller one to try and damp out the fluctuations.
Could a resonance be caused in the vacuum tube to the mags causing the timing to go out at both 1150 and 2300rpm?
Are pmags more sensitive to vacuum?
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