I have for sale a Performance Box GPS based performance meter, lap timer & data logger. It's an all singing all dancing must have if you are seriously into track days or racing and can be fitted to your windscreen or dash in seconds. It uses a fast GPS engine (10 updated / sec) to measure speed, distance, position & acceleration. The results are instantly displayed on a back lit LCD display and all perameters can be logged onto an SD card. Manufacturers descriptions here:
http://www.performancebox.co.uk/overview.html
Included is the data logger, screen mounts, 12v power lead for hard wiring into vehicle electrics, PC leads, external magnetic GPS reciever & Micro input module (With one RPM and four analogue inputs, it is possible to record such parameters as engine speed, throttle angle, or brake force and so enhance the analysis that your PerformanceBox already offers.)
This lot would cost you over £650 to buy new and i am only looking for £350 ono.
Will go up on Ebay in a week if no interest shown here.
Thanks
[Edited on 29/12/12 by Boltsy]