Andrew Anunson
Well Known Member
I have heard that running one magneto, one EI is hard on the mag because the EI runs with advanced timing and the mag does not. Is there any truth to this?
I have heard that running one magneto, one EI is hard on the mag because the EI runs with advanced timing and the mag does not. Is there any truth to this?
I have heard that running one magneto, one EI is hard on the mag because the EI runs with advanced timing and the mag does not. Is there any truth to this?
? I would also assume that the one slick mage is an impulse type, so as to not to interfere with a smooth start? (This is likely basic stuff..I’ve been out of the recip world for i while).
SNIP... In fact, the mag is actually the weak link.
+1
I’ve been running dual pMags for over a decade and recommend them.
My RV-10 started life with mags and I hated them. I especially hated maintaining the overpriced aircraft plugs. That plane is now happily flying with the new six cylinder pMag.
Carl
Kelly,
I recommend you look over the six cylinder pMag installation guide: https://emagair.com/wp-content/uploads/2020/08/Manual-P200-6XLycoming-V40.pdf
During installation you set both the base timing and whatever you want for max timing. For the RV-10 I recommend 25 degrees base and 34 degrees max as my reading indicates that for typical RV flying this provides the best overall timing profile.
Fuel savings are ~10% when high and LOP. Engine start is a blade or so.
You do need to replace the mag mounting studs for shorter ones when you swap out the mag for the pMag, but if memory serves I think Brad at pMag now provides the needed replacement studs with the pMag install kit. Other than that the pMag goes in just like your mag.
As far as keeping aircraft plugs, why? They are expensive and a PITA to clean and keep gapped. I run NGK BR8ES plugs on both the six and four cylinder pMags.
Most (but not all) EIs are better than a mag, but only the pMag can be considered a “drop in replacement”. Any other option requires some consideration of making sure power gets to the EI(s) after something in your electrical power distribution fails.
Carl