For sale is a VBox Sport performance meter. This has 10hz GPS, much more accurate than any phone GPS and works with Harry's Lap Timer, or if you have IPhone the Vbox app for 0-60, 1/4 mi, braking etc.
$325 Shipped OBO
Inlcudes suction cup mount, factory SD card 8GB, factory 12v power supply and cable
https://www.vboxmotorsport.co.uk/index.php/us/products/performance-meters/vbox-sport
Tom's Turbo Garage did a great review here:
https://www.youtube.com/watch?v=DaUvlQWOngA
