Mounted up, the MSD CDI coils looked almost identical to the original IGN-1A coil pack bracket.
We mounted the new 3D-printed MSD CDI coils in the same location of the IGN-1A coils, replacing the factory ignitor. This was a great solution until we started laying out the wiring and packaging of the entire engine bay as we started to build the custom wiring harness. It was far more ideal to mount the radiator fan relays in this area so we decided to move the CDI coils from this location to be relocated onto the engine like the factory coil packs.
We designed and 3D-printed custom mounts for the coil packs directly on the rotor housings, just like the factory did. CDI systems don’t flinch at 10K+ rpm or high-power levels, and the coils are far less sensitive to heat than IGN-1A Smart Coils, where even a 20–40°F cooler mounting location can noticeably boost performance. Mounting the CDI coils on the block not only makes better use of engine bay space, but also shortens wiring from the CDI box to the coils, and especially the ground wire from the coils to the block, improving reliability and simplicity.
We test fit the new coil mounts onto the engine itself and had to make a few small revisions.
After a couple more prints and revisions, we were happy with the positioning of the four CDI coil packs and were ready to print the final mounts out of PAHT-CF, a high-temperature carbon fiber nylon.
2 comments
Is the msd pro 600 cdi capable of being used for a 4 rotor ?
That’s a great question. Unfortunately no one knows until someone tries it. There was very little information on the ability for the PRO 600 to work on a rotary since the guy who designed it no longer works for the company and there’s not enough information on the circuitry (surprisingly). In theory it should be able to…