 Weird speedometer issues |
 Jan 20, 2008 - 8:43 AM
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Enthusiast  Joined Dec 16, '07 From College Station, TX Currently Offline Reputation: 0 (0%)  |
Hey guys, i recently got a GPS unit for my celi and I've noticed that the speed the GPS says I'm traveling at does not match my speedometer readout. Basically, the speedometer is always overshooting my actual speed - for example, when the speedometer reads 80mph, the GPS says i'm traveling at 72mph, speedo: 70- GPS: 63, speedo 55 - GPS 50. It's not the GPS unit getting a bad reading - I did the same test in another car and it read the same as the other car's speedo. Weird thing is, it's not just off by some systematic amount - it's a ratio thing somewhere. Any ideas??
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Jan 20, 2008 - 8:50 AM
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 Moderator Joined Oct 1, '02 From fall river, ma Currently Offline Reputation: 13 (100%) |
do you have aftermarket rims + tires?
they can throw your speedo out a few MPH. -------------------- Former Team 5SFTE pro member ;)
 13.6@108MPH, 5SFTE Powered |
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Jan 20, 2008 - 9:11 AM
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 Enthusiast Joined Oct 28, '07 From epworth uk Currently Offline Reputation: 3 (100%) |
speedos in car are usually slightly under but larger rims will increase this depending on tyre size but gps will be spot on i used my gps to set my speedo back up when i replaced dials hth
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Posts in this topic
aggieanton Weird speedometer issues Jan 20, 2008 - 8:43 AM
aggieanton Nope, i just have the stock 15's... It's j... Jan 20, 2008 - 9:51 AM
presure2 QUOTE(aggieanton @ Jan 20, 2008 - 9... Jan 20, 2008 - 10:24 AM DEATH It's also very hilly in and near college stati... Jan 21, 2008 - 10:50 AM laff09 QUOTE(DEATH @ Jan 21, 2008 - 10:50 A... Jan 21, 2008 - 6:44 PM Daftboy GPS lags... Jan 22, 2008 - 1:02 AM |
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