When installing fuel-pressure gauges, use an isolator on a mechanical gauge, or switch to an electric gauge to keep fuel from passing into the passenger compartment. You can also run a mechanical gauge without an isolator if the gauge is mounted outside the passenger compartment, such as on the cowl panel or within the rear raised cowl of an aftermarket hood.
Those with sharp memories will recall we installed fuel and boost gauges in our 3g GT project in the June '03 issue ("Meticulous Monitoring," p. 180). When we installed our first set of Auto Meter gauges, we were in a rush to complete the upgrade for display at an event. This meant we couldn't wait the few months for Auto Meter to release its new Cobalt C2 product line and ultracool electric boost gauge. But Auto Meter's ever-smiling Ron Piasecki delivered the company's latest offerings into our sweaty little hands as fast as he could, and we're now ready to upgrade the A-pillar gauge setup in the 3g GT.
Unlike the Lunar gauges that use electroluminescent green lighting, the new Cobalt C2 gauges use bright-blue LED lighting to illuminate their white faces. The C2 illumination matches our NR Auto gauge overlays much better, and the idea of having an accurate electric boost gauge to monitor our ProCharger D-1SC is enticing too. As our A-pillar gauges were previously installed, this project is more of an upgrade, but we'll also go over the high points of the original installation for you new readers.