After finishing our measurements, we headed to Guldstrand Pro Motorsports Wiring in Santa Monica, California. Cody Guldstrand has spent decades in motorsports and built one of the country’s best wiring shops, known for his meticulous attention to detail, deep racecar building knowledge, and forward-thinking approaches to designing and constructing wiring harnesses. He also offers arguably the best 13B & 20B FD RX-7 engine harnesses on the market for many different ECU options.
Having worked with countless motorsports wiring people over my professional racing career, and having personally built harnesses for a NASCAR Cup team working in their wiring department for over a year, I was genuinely impressed by Cody’s expertise and the processes he’s honed over decades. I was excited to pick up new techniques and take my own wiring skills to the next level.
The factory wiring from the MSD PRO 600 kit is fairly generic and works on 4,000hp Pro Mods, but this wiring was not up to the same level that Cody or I are used to so we unpinned the connectors and created a harness from scratch.
The original coil pack connectors (top) are more than enough to do the job. But compared to the shielded milspec wiring (bottom) there is a clear difference in Cody’s approach and the materials he uses.
After pinning all four coil pack connectors, using DR25 heat shrink, hard glued the ends of the shrink and strain relieved the ground wire, I was ready to assemble the harness into a single DR25-covered loom.
Each coil pack connector is labeled to identify the leading and trailing coils for each rotor.
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…