Buy a playback tack or mount a Go Pro camera.

Where is the variation happening on the ticket? You can figure out your incremental times, meaning the time between each time listed on the ticket, and hone in on where your variation is happening. 60' is the easy one since no calculations needed.

1320 that is from a go-pro
and Bucky my concern is I am thinking my convertor doesn't flash enough as the night goes on it will pick up 2 to three hund every pass down the track but the 60 is the same

Then go pro needs to be mounted better so as to see the tsch straight on.

That said, at what RPM does the engine make peak HP and peak torque?