The Cart Before the Horse: Spec 3 Build

[Jake]

Regardless of what other method(s) you use to control the fan, use a switch. I love knowing the fan is running "for sure" when I say it should. My switch has a red LED that lights up if the fan itself comes on. If the switch is flipped and no LED, something isn't right.

You don't need it above ~30 mph but around the paddock, waiting on grid, warm up/cool down laps, etc you absolutely want it running.

What is your radiator ducting situation like right now? You need to either have the stock pieces to funnel air (undertray, nose pieces, etc) or something like the Motion Motorsports undertray. If you don't have either, a lot of air will not make it to the radiator and the car will want to run warm/overheat on anything warmer than a mild spring day.