09-16-2007, 02:19 PM
I use the UltraLap Timer by XT Racing. It's about $250 for the receiver and transmitter. It stores many many sessions, and auto turns-on-off so you just drive and it does it's thing. It's light years ahead of the Hot Lap system that many people use.
http://www.cc-2000.com/xtracing/en/ultra-lap/index.html
http://www.cc-2000.com/xtracing/en/ultra-lap/index.html