How do you get RPM indication during mag check when you have one mag and one Lightspeed ignition. I curently have my rpm taken from the lightspeed. Can you connect the mag to the ems as well. How do you configure the ems to switch between the two during mag check
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RPM
- Thread starter JTD
- Start date
Hey Tim,
Not a direct answer, but consider using a hall effect tach sensor on your mag. It costs a little money and requires +5v to +12v regulated power, but you'll be able to do a mag check seamlessly.
I have a G3i with two mags and started using the +12v square wave signal from the electronic ignition for tach signal. RPMs got erratic at around 2500 and I ran into the same problem doing a mag check. My solution was to use a mechanical tach generator off the drive port on the back of the engine. That worked for awhile and was more stable, but broke in less than a year. The replacement was not accurate/stable. I should have gone with the hall effect sensor in the first place. No moving parts and it would have cost less than the two mechanical ones. I don't even want to talk about all the time and aggravation it cost.
-Russ
Not a direct answer, but consider using a hall effect tach sensor on your mag. It costs a little money and requires +5v to +12v regulated power, but you'll be able to do a mag check seamlessly.
I have a G3i with two mags and started using the +12v square wave signal from the electronic ignition for tach signal. RPMs got erratic at around 2500 and I ran into the same problem doing a mag check. My solution was to use a mechanical tach generator off the drive port on the back of the engine. That worked for awhile and was more stable, but broke in less than a year. The replacement was not accurate/stable. I should have gone with the hall effect sensor in the first place. No moving parts and it would have cost less than the two mechanical ones. I don't even want to talk about all the time and aggravation it cost.
-Russ
- Joined
- Mar 23, 2005
- Messages
- 13,226
Yes, you can connect the mag as well. Just follow the directions and make sure to use the 30k pullup as instructed.
Alternatively, the Vans poweed tach transducer is another option. It can be found at http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1327715278-464-246&browse=ei&product=vans-tach (you don't need the whole instrument, obviusly).
Alternatively, the Vans poweed tach transducer is another option. It can be found at http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1327715278-464-246&browse=ei&product=vans-tach (you don't need the whole instrument, obviusly).