We then wrapped up the install by running the large red wire to a 12-volt source and running the large black wire to a good ground. A cool new feature, the fans come on at 60% once the thermostat hits the designated temperature. This reduces the impact on the charging system as the fans can draw up to 28 amps at 100 percent duty cycle. After a 10 degree rise from the set temperature, the fans run at 100 percent to keep the engine nice and cool. Back on the dyno, the electric fans shocked all of us by spinning the wheels at 279 hp and 286 lb-ft of torque. A couple hours of work yielded an amazing 22 hp (before the nitrous).