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Originally Posted by speedworks
I assume the OBD-II has to plug into an OBD-II outlet in a normal car?
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Yeah, if you don't have an OBD-II port on your racecar, you'd have to find some other solution for individual sensors or whatever.
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And as for the GPS bluetooth (like TomTom's Iphone holder?), does that just need power and that's it? Sounds interesting, I might have to try one of these.
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I don't really know about TomTom and/or iPhone. The Qstarz unit I'm using has an internal battery that will go for several hours, and recharges via a Mini-USB plug, so you could just recharge it from a laptop or whatever before track time. (You also use the mini-usb to update the DGPS Almanac data and configure your rate settings, etc from a little Windows app. DGPS will work without an outdated almanac, but you get the very best results by being sure it's up to date before a track day (the almanac data lasts about a week or so)).
In my car, I just velcro down the GPS unit to the dash. For in-car power for the GPS unit and my phone, I put a dual-USB thingy in the center console 12V socket and I ran a micro-USB cable under the dash to my phone and a mini one for the GPS. Really not necessary though, you could pre-charge them and run on batteries.