I use Vbox and it is extremely accurate and I can chart graphs as well to get a better understanding of the run
http://www.vboxmotorsport.co.uk/inde...performancebox
ive been doing a lot of heavy acceleration testing the last 2 weeks ( 0-60 1/8th 1/4 and 60-130) and have learned a lot. been testing on both on the strip and street and the Vbox matched all results within 1/10th less than 1 mph. Vbox was dead on with my 1/4 and 1/8th mile runs and the only difference is it measures terminal speed to 660 and 1320 feet where the time on your slip is an average taken just before. for instance slip was 126 Vbox was 127
here is 0-60 per magazine standards MT R&T C&D without weather adjustment