When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I am testing the ignition circuit for my rotary engine (1989). The circuit has 3 coils: one Double Ended Wasted Spark coil, having the two leading spark plugs connected to it, and two coils for the trailing spark plugs (so one spark plug per coil). My engine has 2 rotors, they are shifted one from the other, so the trailing should occur at different phases for both rotors. The leading spark plugs will fire at the same time since they are connected to the same Double Ended Wasted Spark coil. I connected my Sync sensor to an oscilloscope, and also the signal sent to the coils (one at a time). I get signals that make sense: indeed both trailing coils get one pulse per rotation of the eccentric shaft, and the leading double ended coil gets 2 pulses per rotation of the eccentric shaft, since one of the pulses is 'wasted'. My question is therefore, how can I know what trailing spark plug should I connect to which rotor of my engine? I am not sure how I could check this.
Each spark plug wire port is labelled on the coils.
Trailing for example has T1 and T2 if you're looking at the end of the coil pack facing the engine. 1 is the front rotor, so it's T1 for the front rotor trailing and T2 for the rear rotor trailing.
The leading is also labelled similarly, but it doesn't really matter as you mentioned since they're waste spark.
06-20-23, 04:48 AM
