Failure on race day due to wiring gremlins is not an uncommon issue at some levels, but with the time and money that goes into running a professional level vehicle at events all over the globe it is inexcusable.
Luckily there are people like Chris Paton of 12 Volt Performance out there to build motorsport specific looms that allow for the extra heat, fluids and wear that a dedicated motorsport car will see much more of compared to your average car or even performance streetcar. At the latest World Time Attack Challenge we were lucky enough to have a chat with Chris about what goes into looms like that of the Tilton Interiors/Racing EVO V2 Time Attack car and how you can progress from general automotive wiring into motorsport specific applications.
Also discussed are some of the main point of differences between a general automotive loom and a motorsport specific variant including a quick break down on the advantages of Tefzel wiring compared to TXL which you will find in almost all street cars along with how in the past it has been difficult to find solid resources beyond pictures to help learn and build such a skillset.
Also touched on is the cost of the materials and tooling required for professional-level looms, but for the end result it is certainly worth it. Concentric twisting is also discussed along with the detail that goes into planning your braid in order to benefit from the strain relief and flexibility of such a technique but not at the cost of added weight from poor planning and excess filler wires.
What are filler wires you ask? Chris also explains this along with how before a single wire is cut everything the car will run not just now but also in the future plans is mapped out in the car and measured to ensure there are no mistakes and no need for extra additions to the loom in the future which are difficult at best and add a higher chance of failure.
With 20 to 40 hours going into an engine loom/harness it is certainly worth the time and effort to plan ahead and use the best materials for the application first time around in this game. The 1200HP, 42PSI, 2.2L 4G63 powered Tilton EVO V2 also had a successful weekend at WTAC with a 1st place in Pro-Am and 3rd in Pro which is a credit to Chris and the rest of the large team behind builds like this, which went from bare chassis to the track in only 3 months.
Want to learn more about motorsport wiring? Start with a free live lesson.