 A piggyback clip was used...  A piggyback clip was used to tap into the headlamp dimmer switch to prevent cutting the wire. |  After the gauges were grounded...  After the gauges were grounded to the chassis, a quick twist of the key let us know everything was in working order before the A-pillar pieces were reinstalled. The Auto Meter pod was able to use all the stock screws and mounting holes. |  Wires from the EGT gauge were...  Wires from the EGT gauge were routed to an amplifier box that sends signals through a single wire to the Varicool controller box. The box was also grounded and connected to an ignition-on wire. |
 The water/methanol controller...  The water/methanol controller reads boost and EGT to control injections, so a T-connector was used to tap into the factory MAF sensor line. The boost line for the Auto Meter gauge was connected, and zip-ties were used to make sure none of the lines pops off. |  Another T-connector was placed...  Another T-connector was placed in the line under the dash to send pressure to the Varicool control box. The Coolingmist diesel system reads EGT and boost to calculate when the water/methanol mix is injected. A laptop computer can be plugged in to the side of the controller for custom tuning in high-horsepower applications. The factory settings allow plenty of control for this Power Stroke that uses a stock turbo, 4-inch exhaust, and mild programming. |  The factory diagnostic port...  The factory diagnostic port on the transmission was used to mount the temperature probe. Threads on the fitting were wrapped with Teflon tape to prevent leaks. A thermocouple mounted in the transmission pan is more accurate, but a high-capacity pan upgrade is planned for the future, so drilling into the beat-up, old pan was unnecessary. |
 Once everything was installed...  Once everything was installed and our water/methanol tanks were filled with a 50/50 mix, the Varicool was set to come on when the EGT reaches about 870 degrees F. This setting causes the Coolingmist to start spraying every time the driver needs to pass and during climbs on steep mountain grades. The truck's owner immediately noticed the power gains, saying the F-350 felt like it had at least 10 extra horsepower at the dual rear wheels. |  (continue)He said now the...  (continue)He said now the truck doesn't need to downshift as often while towing. The green status light on the Varicool controller blinks when the system is armed, and the light shines solid when the injector is spraying. The lighted Auto Meter gauges keep the driver informed about the tow rig's operating conditions, and the carbon-fiber styling helps update the interior of this first-generation Power Stroke. | |