Next you have to figure out why the kart was faster at that point and then how to repeat that so that the driver can go out and use the information to go quicker.

In the example we are at rye house, and I've placed the cursor at the point where the green line starts to dip below the blue one in our time comparison. The cursor shows up on the track map too so we can see where we are on the circuit, the cursor also draws a vertical line all the way up the screen so we can see the corresponding point on the speed traces. (I've highlighted the area of interest in red for your convenience)

So, we can see from the map that we start gaining time approaching the infield hairpin. Now we need to look at the speed traces to see where the green speed is higher that the blue speed. If you look closely the blue and green lines are dropping sharply under braking for the hairpin, but the green line doesnt dip nearly as low as the blue line, before they both start to climb again under acceleration on exit of the hairpin.

This means that we carried much more apex speed and were able to pick up speed well on the exit. Sometimes a high apex speed will be followed by a poor exit, but in this case we learned that carrying more speed through the hairpin was quicker and didnt hurt our exit.

Unfortunately, that time gained disappears very suddenly when we try to take the next hairpin too quickly, which you can see when that green line on the time comparison shoots back up again. But because we have data we have the chance to pinpoint where we can make time, figure out why and show the driver exactly how to put together a much faster lap!

Read on to see how GPS reveals a one off mistake found three tenths