I realize it’s been forever and a day since I’ve had an update, so I figure I’d add these pics from the JefeS14′s RB25 build - click for full size!
I started this build with the intention of having a very clean/impressive engine bay, with no wires visible and nothing passing through the OEM Swiss cheese holes in the firewall – this necessitated bulkhead connectors for main power, engine harness, forward body harness, and brake lines (for the hydraulic ebrake).
Unfortunately Mil-Spec circular connectors that can handle ~100A are cost-prohibitive, so a buddy in the movie industry put me on to Marinco’s CLM line of CamTech twist-lock connectors, rated for 150A. I used a ‘mini’ bulkhead connector and an inline female terminal for about $30.
Starter -> Marinco Connector for Main Power
Next started the tuck and loom process for the entire upper engine harness using Mil-202 flame retardant sleeving and 3M double-wall adhesive heat shrink. I separated the factory R33 harness by function (ignition, injectors, sensors, and trash), combining upper and lower engine harnesses as I went. Since I did not have access to new OEM pins, I used the factory connectors and pins with Mil-W-22759 ‘Tefzel’ wire in OEM gauge.
Ignition Wiring - Tucked/Loomed
The injector wires were extended so that the plugs come up through the runners of the intake manifold:
Injector Wiring, Extended/Tucked and Loomed
Sensor Wiring, Tucked/Loomed
With all junctions that are exposed to the elements, the adhesive heat shink is ‘lapped’ so that there is a weather-tight seal from all angles:
Sensor Wiring, Tucked/Loomed - Closeup on 3M Mil-spec Adhesive Heat Shrink
Instead of a large chrome/nickle solder-terminal Amphenol connector like with the Camaro, I tried using a smaller, hard plastic crimp-terminal 37-pin Tyco connector – I figured this would be more affordable option for future customers. I found that these connectors afforded the pins/sockets a little too much misalignment, and when the cost of the pins and sockets is factored in, these lose any value advantage to the larger Mil-C metal connectors.
Tyco Mil-C Black 37pin Bulkhead Connector Pinned, pre-wrap
This was the interior connector, which was later weather-proofed (pic is from initial assembly).
Tyco Mil-C Black 37pin Bulkhead Connector Pinned, pre-wrap
The finished product, an intake side with almost no evidence of wiring, and protected from heat, fluids, and abrasion!
Injector and Sensor Wiring Tucked/Loomed - Finished Cold Side
