I made this plugin to emulate the delta split feature of iRacing. It displays a realtime delta against your best lap time of the session.
Here's a demo of (an old version of) the plugin in action:
The current version is v16, the functionality is all there, and I am basically satisfied with what I have achieved. I have planned another small upgrade, but I'm not sure if I'll ever get around to it. We'll see
Here's the original thread from ISI forums: