Does anyone have pictures of the coil installation for the Plasma III on an IO-540? I'm installing a dual Plasma III in the RV-10 project. I can make up my own coil installations, of course, but I'd rather not reinvent the wheel.
As the coils are considerably larger than those on the Plasma II on my RV-4, installation will have to be a little different. A couple of different methods come to mind.
1. I've seen references to mounting all six coils on the back baffle near the center of the engine: 3 on the front side of the back baffle and 3 on the back side. The front side would power the top plugs and the back side would power the bottom plugs. Advantages: neat installation, relatively cool location. Disadvantages: the weight of the coils would require stiffening that back baffle; lower plug wires would have to be pretty long.
2. Mount the three top plug coils on brackets on the top engine case bolts; mount three bottom plug coils on cushion clamps along the lower engine mount cross tube. Advantage: about the shortest spark plug wires possible. Disadvantage: lower coils are in the hotter engine cooling airflow.
How did you guys solve the competing priorities?
As the coils are considerably larger than those on the Plasma II on my RV-4, installation will have to be a little different. A couple of different methods come to mind.
1. I've seen references to mounting all six coils on the back baffle near the center of the engine: 3 on the front side of the back baffle and 3 on the back side. The front side would power the top plugs and the back side would power the bottom plugs. Advantages: neat installation, relatively cool location. Disadvantages: the weight of the coils would require stiffening that back baffle; lower plug wires would have to be pretty long.
2. Mount the three top plug coils on brackets on the top engine case bolts; mount three bottom plug coils on cushion clamps along the lower engine mount cross tube. Advantage: about the shortest spark plug wires possible. Disadvantage: lower coils are in the hotter engine cooling airflow.
How did you guys solve the competing priorities?