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Old 04-06-2009, 12:56 AM   #1
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Default Wow, no wonder I get tailgated so much in the Miata.

I now have a GPS velocity display in the instrument cluster and my the accuracy of the Mazda speedometer is even worse than I suspected. It reads 45 at 37! My other car's speedometer is dead on to 100+.

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Old 04-06-2009, 01:13 AM   #2
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hmm, I get tailgated when going 10/15mph over the speed limit-thought people were just being jerks but maybe there is something to this-will have to have some friends pace me sometime to check.
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Old 04-06-2009, 01:18 AM   #3
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There is always someone wanting to go faster than you and will tailgate you...

On another note, those gauges are pretty damn cool!
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Old 04-06-2009, 01:27 AM   #4
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where did you get those gauges?
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Old 04-06-2009, 02:58 AM   #5
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Didn't he build them? I remember seeing a bird's nest of wires for those.
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Old 04-06-2009, 11:01 AM   #6
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haven't you heard? the speed limit is a minimum!
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Old 04-06-2009, 11:13 AM   #7
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Mine reads spot on from 2 different GPS units + the GPS on my laptop...but I have 205/45/16 tires. What tires are you running kday?
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Old 04-06-2009, 11:25 AM   #8
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Tested all my cars when I got the Garmin:

Miata - consistently reads 5mph over actual

Xterra - lies and tells you you're still under limit when you're actually 3mph over

Cavalier - dead friggin spot on up to top speed (not much)
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Old 04-06-2009, 11:29 AM   #9
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Quote:
Originally Posted by gospeed81 View Post
Cavalier - dead friggin spot on up to top speed (not much)
Cough108cough

The cav I had was dead on too, I think.
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Old 04-06-2009, 12:10 PM   #10
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I am running stock size tires on original 1990 alloys.

And yes, the gauges are custom.
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Old 04-06-2009, 12:30 PM   #11
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When I pass those radar detectors with the display(like in school zones) it's usually around 5 or so mph off...
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Old 04-06-2009, 03:00 PM   #12
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I have a 4.30 speedo gear and a 4.10 diff and my speedo is dead nuts accurate (GPS confirmed) up to 100mph or so.
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Old 04-06-2009, 03:09 PM   #13
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+1, very nice job on the gauges.
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Old 04-06-2009, 03:16 PM   #14
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any more info on the gauges?
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Old 04-06-2009, 04:10 PM   #15
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if people tail gate me, I shoot them.
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Old 04-06-2009, 04:33 PM   #16
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In the northeast it is considered gauche to shoot other drivers. We get by with honking.
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Old 04-06-2009, 05:27 PM   #17
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you could lift off your speedometer needle and re-position it...

**************
if you wanted your factory guages not to have the green tint light, you can slip off the green vinyl covers from the light bulbs.
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Old 04-07-2009, 12:25 PM   #18
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The gauge is not a fixed amount off -- it is correct at 25 MPH, for example. So moving the needle won't make it more accurate across the whole range.

The green and yellow is kind of ugly but I don't really care. This project is not about aesthetics...
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Old 04-07-2009, 05:01 PM   #19
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Actually there is a green tint on the back of the gauges too...which can be sanded off. I did it and it came out nice.

BOT - That's a damn nice setup. My speedo is off, and I know it.... I think I put it in a tick off when I did my gauges..same with my fuel gauge which when it's on E, it really is on friggin E (11.5gal to fill up.. I have put 13 in it though). I've figure out that my speedo is off by 8mph... so I always do 18mpg over the posted speed limit according to my speedo.
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Old 01-01-2011, 10:02 PM   #20
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Quote:
Originally Posted by Doppelgänger View Post
so I always do 18mpg over the posted speed limit according to my speedo.
That sounds really green
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