I have ended up with both the XGPS150A and the Emprum Ultimate. XGPS150A--the little tiny white tab to switch from Apple to Other products broke off; Dual was very quick and easy to work with, they replaced the unit with a new one. --the max I've gotten is 4Hz. I have the latest update from Dual. Em...

Went karting today. The XGPS150 with the newest firmware (1.2.6) and HLT ver.17 got 4hz all day, never varied. The Dual was strapped to my arm, and since it was a kart, it was visible to the open sky.

Can somebody post an "Upgrade for Idiots" tutorial? I have version 16.6.2 Professional, and I cannot find any button or method to upgrade tp PetrolHead version 17. I read the first post in this thread, went to HLT in the App Store, went in App on HLT in my ITouch, I can't see how to upgrad...

Ok, it's coming together. After reading posts, I've decided to use the GoPoint GL1 (cabled), rather than the BT1, in order not to have two Bluetooth accessories going to the ITouch simultaneously. (Have the Dual GPS being Bluetoothed to the ITouch.) Question: The GL1 is plugged into the OBD socket i...

GPP, Fantastic! This is just the information I was looking for. Many thanks. I don't think I have to be concerned about what the "'-ring's" rules are, unfortunately. I've ordered the Dual, and I was planning on velcroing or sticky-taping it to the dash at the base of the windshield, er, wi...

Much thanks for your responses! I'll take direct info, tangential info, any info I can get. But, tell me, you have your IPhone in the glove compartment? What IS the function of the IPhone? I realize it contains the Harry's Lap Timer app, but it can be in the glove compartment? I am going to use a Go...

Dual XGPS150A vs. Emprum Ultimate I'm acquiring all the gizmos for my first lap timer setup. Trying to decide between the above two GPS units. 1--What are the latest pros/cons of the two? 2--Dual--Have read people are having problems with their 5hz update rate (0.0, 3.9, 4,7, etc.) Has this been fix...