Originally Posted by jcarne
.......on my engine and if my Pmag is timed at 25 degrees on my IO-360 in those conditions I will approach 400 easily in climb. I took out about 4 degrees of timing recently and my CHTs now top out around 385 in hot conditions on climb.
Pretty sure eMag timing is at TDC or 1-6 degrees after TC.
Straight from page 14 of their manual
"Note 1: Be wary of old magneto timing habits. Magnetos are timed using the 25 degree (or other) BTDC marks. Here, you will time at TDC or slightly after (never before)."
I've got a Plasma III for the top plugs that I've been very happy with for the last 500+ hours. Wire it up just like the manual says and you'll have zero issues. Mine has the Hall effect module.
When Slick came out with their service bulletin a couple of years ago I swapped out that mag for an eMag and have been extremely happy with that ignition system, also with zero issues over the last 150+ hours. To be fair, I had zero issues with the Slick mag for 350+ hours.
Just went flying the other day after completing the annual inspection, 97 degrees OAT, and all CHT's were no hotter than 355. I was also leaning during the climb at 120 kts. Slowed her to 90 kts and highest temperature was 375 on my IO360. At 23/23, anywhere from 5.5k to 9.5k, I get 170 kts TAS burning 7.9 GPH LOP. When I had the Slick mag, I'd burn 8.5 GPH LOP on my IO360 with a Hartzell CS prop.
Pros of eMag:
Super easy to time (compared to a regular mag and/or the Plasma)
No internal plastic parts (that I know of)
Weight savings over a mag
More choice of plugs and consequently much cheaper
21st century product
Can't think of any
As far as research, like others have mentioned, I do like the availability and variety of options and responses found on VAF. I'm not into reinventing the wheel but somewhere along the line you have to chose what's right for your aircraft.