The sensor is installed on the transmission tailshaft housing. Left to Right: The Dyno-Shaft is installed by removing the driveshaft and replacing the slip yoke with the Dyno-Shaft slip yoke You will want to verify that the yoke has the minimum clearance needed to detect the driveshaft's rotation from the housing sensor. “There’s only resistance as long as the tires have grip, the torque will drop in your log, and you’ll see where your tires start slipping,” says St. Racers or enthusiasts can then use that data to assess whether that decrease in traction was due to a track condition, or the car overpowering it’s tires. When data is reviewed from a run, tire slip shows up via the Dyno-Shaft data as a drop in torque, this is because resistance at the tires has decreased as traction decreased. By having the Dyno-Shaft and AQ-1 onboard during a day at the drag strip, we can data log and effectively find out how much power from our car the track will hold, given current weather, track, and even car conditions. The data from the Dyno-Shaft is especially useful in racing applications. A drop in power shown by the Dyno-Shaft will typically indicate one of two things, either tire spin, or a drop in engine performance. As the car is driven on the track or the street, the Dyno-Shaft is measuring how much power is being put through the tires to the surface effectively at any given point. The resistance against the driveshaft is from the tires. The Dyno-Shaft relies on resistance, “It measures the twist in the driveshaft before the rear differential,” according to Paul St. The sensor will attach over the transmission tailshaft where it will send the information back to our AQ-1 data logger. The heart of the system is this slip yoke which replaces the one on the driveshaft and reads twist in the drivetrain. The system logs data on an SD card, which allows a user to log multiple runs and review the data at the end of the day, or after each pass on a laptop. Aside from our AEMnet connections, we simply had to wire in a power, ground, 12 volt ignition switched, and a switched ground. It is important to note that the AQ-1 must be mounted as outlined by AEM in order for its built in accelerometer to function correctly. ![]() We installed the AQ-1 under the driver’s seat of Wild E Coyote. For this installation we’ll also be adding to our arsenal an AEM Dyno-shaft, hooking up our AQ-1, and taking a look at why this is such a powerful set of tuning and track day tools. We’ve already installed an AEM Wideband and Boost Pressure Failsafe Gauge in Project Wild E Coyote. We connected the Dyno-Shaft to AEMnet and our Wideband Boost Pressure Failsafe gauge to supply information back to the AQ-1. ![]() All of the AQ-1's inputs are silk screened, which makes wiring easier. To restore all struck-through data, choose Restore Data from the same menu.The AQ-1 comes with the necessary harness for connecting it to a variety of sensors, it also includes a USB cable to connect it to a laptop for setup. Then choose Strike Through Data from the Graph menu, if you’re on the Graph screen, or from the Table menu, if you’re on the Table screen. First, tap to select the data point in the table or on the graph. In LabQuest App, you can strike through data from the Graph screen or from the Table screen. To restore, select the struck-through data point(s), then choose Restore Data from the Edit menu. Then, choose Strike Through Data Cells from the Edit menu. First, select the data point (or range of data) in the table or on the graph. In Logger Pro, you can strike through data from the graph or table. ![]() ![]() The software will then ignore these points by excluding them in graphs or calculations. Instead, you can strike through the data cells. Just as you wouldn’t erase data from a lab notebook, our software prevents you from deleting selected data points from a particular run. Logger Pro and LabQuest App are designed to support best practices for data collection.
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