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http://www.nsifleet.com/pdf/ProgrammableSpeedometer.pdf http://www.springfieldstreetrod.com/...ionsSpeedo.htm |
I remained convinced that it must be calibratable. I'm hopeful that the talented people here will sort it out.
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I'm almost inclined to 'bite the bullet,' and get the SpeedoDRD. ;) If someone has a good idea how to calibrate the Siemens CPU, please let me know. :)
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Try turing the key on but not starting the engine, then hold individual and combinations of buttons. I had a compass you had to hold the button down, then power up.
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I have an ideal on a "fix" for this, when I finally get around to trying it out, I'll post back results....
should change from 14% high to about 5% low...so it would read about 53 mph when you were actually doing 55 mph, opposed to the current "reading 62 mph when you are actually doing 55 mph" |
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I'm pretty sure the RX3 employs a 3-wire, Hall Effect sensor. The SpeedoDRD receives this signal, then modifies the output rate to the speedometer, as shown below.
http://i442.photobucket.com/albums/q...psf2rgg0bd.png If someone knows of a microchip which performs a stepdown function of about 10 percent, we can build our own speedometer calibration unit. :) The only benefit of the SpeedoDRD is its ability to program the unit for different size wheels and tires. ;) |
For example, here is a speedometer calibrator design which employs a $20 microchip, which can be programmed on your computer.
http://members.rennlist.com/tom86951...r%20Page1.html http://members.rennlist.com/tom86951...rator-beta.gif http://rennlist.com/forums/attachmen...arduino-n3.jpg http://rennlist.com/forums/944-turbo...alibrator.html |
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speedo
Huck,if you figure it out ,even for just the stock ture size ,I want To purchase one,I really want to know how fat I'm actually going!
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Fat
good one weld !!! My laptop is down,, so hitting the buttons on my phone is tuff,, They're small!!
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Been there, done fat. :)
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