Thanks for sharing. This worked like a charm. For future reference, this is exactly what I did:
1. Download the Compare_Time.zip file and unpack on local disk 2. In PI Toolbox click Tools -> Pi Math -> Import 3. Follow the wizard and select the Pi Math file you unpacked 4. Press Alt + 2 to open the list of available channels. You should now see a new channel called Compare Time with a plus icon next to it (indicating that it is a calculated value). 5. In any worksheet, click Insert -> Display -> Time/Distance Chart 6. Press Alt + 2 to bring up the list of channels and select Compare Time7. Press Alt + 1 and add two outings (or two different laps from the same outing if you like). You should now have a graph with the delta time between two lap times. The flat line represents the fastest lap, and the other is the delta (difference).
Norges Racing Team - 2015 Porsche 911 GT3 Cup (ICD-D) - 2015 Porsche 911 GT3 Cup (ICD-PCUP)