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. We can see that as the throttle is applied (purple top line), the pull bar (red line) begins to extend.
Initially, the driver applies about 30 percent throttle and then gradually increases throttle all the way down the straightaway to 100 percent near the end. The engine rpm (black line) never spikes, indicating that the rear tires never break loose. The pull bar controls the engine torque, and the driver uses good throttle control.