[BAracer]

Afternoon

I wanted to do the same on my basic Scalextric digital test track. But I don't think there is a lap timer available for basis analogue or digital set ups. 

I got round it by installing a lap counter, and I just set the timer on my phone to a regular length of time (3 mins is my preferred period) and see how many laps I do in that time. So after each adjustment to a car, I do another three sets of three minutes to see if it goes further than any previous configuration.

The further it goes, the faster the car!