Data acquisition not only tells us exactly how our drivers use the throttle, but also how the traction control devices are working. In this example, we see a graph from a Dirt Late Model car at a test at Eldora. The driver is Kevin Weaver and we can see that as the throttle is applied (purple line), the pullbar (red line) begins to extend. Kevin initially applies about 30 percent throttle and then gradually increases throttle all of the way down the straightaway to 100 percent near the end. The engine rpms (black line) never run up, meaning that the rear tires never break loose. The pullbar has controlled the engine torque and the driver has used proper throttle control. This was a very fast lap.