After seeing other threads about 0-60, 30-50 and 1/4 mile times it made me wonder if there was a bit of software out there for a Pocket PC that would let you record these. One quick search on a site I use for software and voila!, found just the job.
It lets you record any range of speed acceleration, 1/4 and 1/8 mile standing starts and lets you define a circuit to then do lap times.
Bunch of screen grabs to illustrate.
BTW (before anyone comments ), most of the times are me just pootling around, not aiming to get the best times. Although I did have a couple of attempts and managed to get a 2.65 and a 2.7 for a 30-50mph in third - and that was it being a bit wet/greasy.
Initial configuration screen. GPS settings (wired or Bluetooth - what I use although I have a backup wired one too. ) set here, along with speed units.
Main menu showing all the options.
Acceleration timings. Choose the range that you want to measure. As soon as you hit the lower limit the timing starts, stops when you reach the upper limit. If you make a mess of the run you just hit the 'Forget Last Run' button and it's removed from the stats. To do another run you just drop below the lower limit and go again as many times as you want to. All the time it shows the best time and averages out the times.
You can then go into the Records section and plot out graphs.Just chose which results to plot.....
Distance timings - choice of 1/4 or 1/8 mile. Car needs to be at rest, timing starts when car starts to move.
Again, you can plot as many runs as you want to compare.....
Lap Timings - very nifty feature.
First thing to do is drive a lap of the circuit - it can be a closed loop circuit (like most are) or an end to end circuit (i.e. where the start line isn't also the finish line). You start driving, tell it where the start is, drive the circuit and then tell it where the end is. You then give the circuit a name. You can then fine tune the circuit e.g. adjust where the start/finish is if that wasn't where you started recording the lap from. You can also add split time points on the circuit so that they show up as you pass these points on the lap.
As soon as you cross the start line the timing starts and stops when you cross the finish. If it's a loop circuit then timing automatically starts for the next lap and so on. Always shows the last time and best time.
Again, you can go into the records section to pull up any lap(s) and get the data/graphs for them.
So, overall a really neat bit of software and not too expensive. Obviously as it relies on GPS, as opposed to a physical measuring device on the car, it won't be 100% accurate as GPS fixes can vary in their accuracy - but they won't be too far off and certainly give a good indication.
As my kit is transferable between cars, it could be fitted into another car at a meet to let people have a go.