For as long as hot rodders have stomped on the throttle, the resulting readout on the speedometer is a hit or miss proposition. Not anymore. Classic Instruments offers their Sky Drive based on current GPS satellite technology. This offers rodders a foolproof answer to having both an accurate speedometer and odometer—without the hassle normally associated with installation and calibration.

For decades we hot rodders have dealt with the proposition of selecting the correct speedo gear (white, green, blue, red, how many teeth is that?), all in the hopes of zeroing in on the correct one that would allow our speedo/odometer to read correctly—or at least get close. Next came the electric speedos. (Classic Instruments doesn’t offer anything for mechanical speedometers but maybe something in the future.) Very good but still there were speedo gears and the routing of the wiring. Good but oftentimes the resulting hassle of dealing with “dipswitches” was just too much for many a hot rodder.

Well, Classis Instruments (CI) has done it again. Long known for their quality instruments, custom gauge face program, and their restoration shop, the boys from CI have taken it one more step. Based on the latest GPS satellite technology the Sky Drive is a rodder’s answer to a question asked long ago. Anyone of us with a smart phone should be familiar with GPS technology. There are aftermarket GPS units that perform a myriad of tasks but the Sky Drive isn’t that kind of GPS. No, it will not tell you that you are so lost that even your wife has given you up! (We know this because we constantly have to send out rescue patrols to find Senior Tech Editor Ron Ceridono. This guy could have sunk the Titanic and the iceberg at the same time!)

Sky Drive is intended to give you accurate speed and odometer readings and it does so while taking out all of the guesswork and hassle normally associated with calibrating speedometers. The Sky Drive has an omni-directional antenna, which allows you virtually unlimited mounting options, meaning it “sees” in a 360-degree format. It updates its location 10 times per second, making it twice as fast as many of the aftermarket GPS units. It will also allow you to activate electric doors locks and a predetermined speed, or operate any solenoid at a speed you set, such as a cruise control.

The ease of installation is second-to-none and can be used with nearly all electric speedometers in a matter of minutes. Being a sucker for electronic hardware I couldn’t resist the opportunity to install one of these units on my roadster. Since I was in Phoenix about to join a leg of the AMSOIL/Street Rodder Road Tour, I enlisted the crew at Hot Rods by Dean for the install.

While I was out gathering doughnuts, Tony Army at Hot Rods by Dean began the changeover. When I got back he had the installation complete. (Now, for those of you who know me, gathering doughnuts is a science, an art form, so to speak, and doesn’t take me long.) To say this installation went quickly is an understatement. I had to ask Army to take it apart so that I could get photos of the install.

There are five wires (red, black, white, green, and brown), two diode lights (red and green) on the unit, and an activation button recessed within a pinhole. The Sky Drive is a small smartphone-sized device and can be mounted anywhere as long as it is hidden from the outside weather. We found a number of locations behind the dash and beneath the cowl but opted for the backside of the dash. We slapped a piece of Velcro on the Sky Drive and we were set to go. (For the curious among us you can calibrate your speedo to read in kilometers or knots.)