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Speedo Question

Old Apr 13, 2007 | 02:12 PM
  #1  
remusa4's Avatar
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There is about a 3-4 mph difference between the regular speedo and the digital one in the info center in the center of the cluster, which one should I trust? I have found most electrical gauges to be more accurate then the mechanical, so is that true for the speedo too? When I set my cruise at 70 on the regular speedo then I reset the avg. speed on the info center it usually reads 67. Any info on this will be appreciated!

 
Old Apr 13, 2007 | 02:27 PM
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if the readout is from GPS sat nav it is more accurate
 
Old Apr 13, 2007 | 02:36 PM
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Dont pay attention to the center cluster average speed. Your speedometer is more accurate since it is not constantly calculating averages. Its calculating averages over long periods of time. So if you drove 30mph half the day and then get on the freeway and drive 70mph for the other half of the day, your average speed will be some where inbetween 30 and 70.... Er something like that. I think youre confusing actual speed (speedometer) and average speed (center lcd/cluster).. They should never be the same unless you drive a constant speed ALL the time-which is impossible.
 
Old Apr 13, 2007 | 03:04 PM
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ORIGINAL: onepoint8tee

Dont pay attention to the center cluster average speed. Your speedometer is more accurate since it is not constantly calculating averages. Its calculating averages over long periods of time. So if you drove 30mph half the day and then get on the freeway and drive 70mph for the other half of the day, your average speed will be some where inbetween 30 and 70.... Er something like that. I think youre confusing actual speed (speedometer) and average speed (center lcd/cluster).. They should never be the same unless you drive a constant speed ALL the time-which is impossible.
Thats the thing I reset the avg. speed setting after I got up to 70mph on cruise control and drove that speed for 250 miles. So if they were both right they would have had the same speed reading but they dont they are 3 mph apart. You would trust the actual speedo over the center cluster?

 
Old Apr 13, 2007 | 03:06 PM
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I didnt know you could reset it?? I just thought you could turn the disply on/off
I thought it would still be doing the math, and you could just either chose to see it or not see it.
 
Old Apr 13, 2007 | 03:09 PM
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Default RE: Speedo Question

when I use my cruise it varries some for hills, up or down, so unless you were on a perfectly flat road then I would say that variance could be normal - Its an average speed, who cares?
 
Old Apr 13, 2007 | 03:10 PM
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I agree with onetime there to calculate the actual speed its 10%+ 3mph factory standard so if you are going 70mph its - 10% + 3 mph and only a guide

edit: so if your doing 100 mph you are actually doing 93 mph
 
Old Apr 13, 2007 | 07:56 PM
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ORIGINAL: onepoint8tee

I didnt know you could reset it?? I just thought you could turn the disply on/off
I thought it would still be doing the math, and you could just either chose to see it or not see it.
You just hold the bottom button until it resets.
 
Old Apr 13, 2007 | 07:58 PM
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ORIGINAL: akielb

when I use my cruise it varries some for hills, up or down, so unless you were on a perfectly flat road then I would say that variance could be normal - Its an average speed, who cares?
I agree with you except I am trying to figure out if my speedo if off by a few mph. Right when I reset it on a flat roadgo 70 mph on the speedo, the center cluster says 67. I dont care if the avg mph is off I just want to make sure my speedo isnt off.
 
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