rrmccabe Posted November 25, 2007 Report Share Posted November 25, 2007 I have a Z2 going in my trailblazer SS. Is there any advantage to hooking up the VSS? Rich Quote Link to post Share on other sites
whtcrxghst Posted November 26, 2007 Report Share Posted November 26, 2007 Makes your nav more accurate seems like the most obvious one Quote Link to post Share on other sites
jollyrogr Posted November 26, 2007 Report Share Posted November 26, 2007 I'm a noob and don't know much about auto nav systems, so take this FWIW. I just installed a D3 in my car and didn't hook up the VSS. Just did a 4 day road trip over Thanksgiving weekend and there did not seem to be any degradation in the nav capabilities of the system. I thought I might hook up the VSS in the future, but so far I see no reason to do so. Also, I fly small aircraft (cessnas and such) and use a handheld Garmin system when doing so. The Garmin doesn't talk to the plane at all but navigates quite well. Is there a difference in an automotive application? I don't know. Quote Link to post Share on other sites
rrmccabe Posted November 26, 2007 Author Report Share Posted November 26, 2007 Makes your nav more accurate seems like the most obvious one Wonder what part. The VSS cant tell you where you are. Only the GPS can do that. I can see a more accurate speed display on the vehicle dynamics part. Any idea what changes with the VSS? Thanks !! Rich Quote Link to post Share on other sites
whtcrxghst Posted November 26, 2007 Report Share Posted November 26, 2007 The deck has software that combines VSS information with the GPS info and gyro info to improve accuracy. Also helpful if you're in the forest, tunnel, or downtown area where you don't get sat reception Quote Link to post Share on other sites
rrmccabe Posted November 26, 2007 Author Report Share Posted November 26, 2007 OK, gotcha. So when passing under trees it has the ability to keep you moving for a while based on vehicle speed and accelerometer. Sounds worth doing if its right there ready to hook up. Quote Link to post Share on other sites
klaborde Posted December 3, 2007 Report Share Posted December 3, 2007 The deck has software that combines VSS information with the GPS info and gyro info to improve accuracy. Also helpful if you're in the forest, tunnel, or downtown area where you don't get sat reception I have a Z2 installed in multiple vehicles. Both are running what's called Simple Mode with no VSS. The only issues I have is when I am going up an down the hills where I am located, my position is off the road due to sat signal loss. With the following observations stated... Question: With the VSS connected it is only going to simulate your driving based on the last position in a straight line and your speed, if you make a turn the VSS does not help you. Would this be a true statement? Thanks. Quote Link to post Share on other sites
rwerth7 Posted December 3, 2007 Report Share Posted December 3, 2007 The computer also tracks the road that u are on. So with no sat info the system will keep u on the road, the distance down the road determined by the speed sensor. My question is why not hook it up, it can't hurt, will improve the accuracy in many situations and someone on this forum has the same car you have and can tell u the easiest location to tap into the speed wire. Quote Link to post Share on other sites
klaborde Posted December 3, 2007 Report Share Posted December 3, 2007 Why not? Because some vehicles when connected show they are moving faster then what they are really going. Not all VSS's work... Specifically... Chevy 2005 Colorado which I happen to own. So some of us have no choice to drive without. Quote Link to post Share on other sites
jwq Posted December 3, 2007 Report Share Posted December 3, 2007 Vss allows to Z2 to respond much quicker... The GPS updates only happen about once every 5 seconds or so, whereas the updates from the VSS are paractically instantaneous. This makes the unit much more responsive, and also means the position on the map and prompts come with less time lag... Obviously also helps if you (temporarily) have no GPS reception... Quote Link to post Share on other sites
rwerth7 Posted December 4, 2007 Report Share Posted December 4, 2007 Why not?Because some vehicles when connected show they are moving faster then what they are really going. Not all VSS's work... Specifically... Chevy 2005 Colorado which I happen to own. So some of us have no choice to drive without. I'm not sure about the Z2 but the factory NAV on my Lexus GS has the ability to adjust the NAV for errors from the VSS. Hopefully someone on this forum will know how to make similar adjustments to the Z2 Quote Link to post Share on other sites
jwq Posted December 4, 2007 Report Share Posted December 4, 2007 Why not?Because some vehicles when connected show they are moving faster then what they are really going. Not all VSS's work... Specifically... Chevy 2005 Colorado which I happen to own. So some of us have no choice to drive without. I'm not sure about the Z2 but the factory NAV on my Lexus GS has the ability to adjust the NAV for errors from the VSS. Hopefully someone on this forum will know how to make similar adjustments to the Z2 Not needed, the Z1/Z2 autocalibrates, using the map data and GPS... Quote Link to post Share on other sites
edrock200 Posted December 4, 2007 Report Share Posted December 4, 2007 The deck has software that combines VSS information with the GPS info and gyro info to improve accuracy. Also helpful if you're in the forest, tunnel, or downtown area where you don't get sat reception I have a Z2 installed in multiple vehicles. Both are running what's called Simple Mode with no VSS. The only issues I have is when I am going up an down the hills where I am located, my position is off the road due to sat signal loss. With the following observations stated... Question: With the VSS connected it is only going to simulate your driving based on the last position in a straight line and your speed, if you make a turn the VSS does not help you. Would this be a true statement? Thanks. The unit has a gyroscope built into it so it can detect turns, uphills, down hillis, sudden slowdown or accelleration. If you go to the 3d calibration page and drive a bit, turn, stop, etc it shows you what it detects. It's pretty cool. I have the VSS wire hooked up and its really nice, especially in long tunnels. I'd imagine if your in boston around the big dig area this would be crucial. Quote Link to post Share on other sites
rrmccabe Posted December 7, 2007 Author Report Share Posted December 7, 2007 I will say the screen scrolls much smoother with the VSS hooked up. Instead of jerking every few seconds it seems more fluid. Quote Link to post Share on other sites
jwq Posted December 7, 2007 Report Share Posted December 7, 2007 I will say the screen scrolls much smoother with the VSS hooked up. Instead of jerking every few seconds it seems more fluid. yep, like I said above, much more frequent position updates.... Quote Link to post Share on other sites
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