Brand new STi Speedo off by 5MPH?
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From: Longing for my ol' white '02 WRX :(
Car Info: 2016 Acura RDX ... meh. Um, nice subwoofer?
Has anyone consdiered that the speedometer could be miscalibrated while the odometer might be fine? It could be a combination of any 2 meters and speed sensor malfunctioning.
jason
jason
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From: Wherever Sucks the Most
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couldn't you pace a couple miles with a car that has a good odometer. Or get your own pace count in meters and convert to miles...if you're poor this works great! Just pick-up a rock for every 100m you cover. Once you have 10 rocks in your hand you've just covered 1km.
for example i know from experience my pace count is 62, meaning for every 62 times my LEFT FOOT hits the ground i've scaled ~100m. Therefore, for every 620 times my LEFT FOOT hits the ground i've scaled 1KM. just do some math and you can acurately scale a couple miles the "poor man" way. Once when i walked 40miles i figured i had an average of +/-30 to 35m error for every 10miles i covered (on flat terrian).
Reset the trip odometer, drive for a few miles and see how far off it is.
for example i know from experience my pace count is 62, meaning for every 62 times my LEFT FOOT hits the ground i've scaled ~100m. Therefore, for every 620 times my LEFT FOOT hits the ground i've scaled 1KM. just do some math and you can acurately scale a couple miles the "poor man" way. Once when i walked 40miles i figured i had an average of +/-30 to 35m error for every 10miles i covered (on flat terrian).
Reset the trip odometer, drive for a few miles and see how far off it is.
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Joined: Sep 2003
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From: Atlanta/Cayman Islands
Car Info: 2002 White WRX Wagon (WWW)
I believe I read somewhere that speedos can be off as much as 12% As for racking up extra mileage... I'm sure there are two separate sensors. Ask Subaru about that one, maybe you can get an answer. (Maybe you already did I don't know)
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There was an article in car and driver about this. Apparently, BMWs average almost 10 miles per hour over the actual speed at ~70 mph (I can't remember the exact figures), but even the more accurate ones are about 3-5mph high. However, the odometer uses a different sensor, and doesn't use the speedometer readings to determine mileage. I"m pretty sure that the wrong wheel size will still throw it off.
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Joined: Mar 2003
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From: MI
Car Info: Was Patiently Waiting STI
My 2 Cents
As a driver of many different vehicles here is a general odometer test that I've used to check odo accuracy. At any mile marker note the odo reading (trip as well). for the next 3 or greater mile markers does the odo roll within a tenth of a mile? If it does, I'm happy.
I noticed my STi speedo reads approx 4-5 mph faster than actual, but the odo rolls on the mile marker numbers, so I don't complain. I'd like to see GPS versus speedo comparisons with other vehicles.
To be honest, and I worked for eight years on a big three technical assistance line. If the speedo error is less than 5 mph and the odo is on the numbers there is no action that we suggested or required the dealer to perform. At lower speeds < 35 mph the accuracy had to be within 2-3 mph, but at higher speeds if it was around +-5 we would not suggest any change.
Try as you might, you will just make yourself sick pushing this issue.
DonttryMe:banana:
I noticed my STi speedo reads approx 4-5 mph faster than actual, but the odo rolls on the mile marker numbers, so I don't complain. I'd like to see GPS versus speedo comparisons with other vehicles.
To be honest, and I worked for eight years on a big three technical assistance line. If the speedo error is less than 5 mph and the odo is on the numbers there is no action that we suggested or required the dealer to perform. At lower speeds < 35 mph the accuracy had to be within 2-3 mph, but at higher speeds if it was around +-5 we would not suggest any change.
Try as you might, you will just make yourself sick pushing this issue.
DonttryMe:banana:
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