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Old 02-24-2009, 05:53 PM   #1
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Math Geeks Wanted:Speedohealer help

ok guys I am calibrating my speedo healer now just having trouble getting the conversion

http://www.speedohealer.com/eng/sh_calc_2.htm

thats the calculator

the bike stock has a 17-45 set up and now my bike has a 16-45 set up

somebody calculate it and copy and post the directions for me please!!!!
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Old 02-24-2009, 06:07 PM   #2
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chit... lemme redo it... didn't see the '45'; it was set to 42
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Old 02-24-2009, 06:08 PM   #3
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OP said rear sprocket is 45
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Old 02-24-2009, 06:11 PM   #4
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Old 02-24-2009, 06:12 PM   #5
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you can't figure out the calculator?
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Old 02-24-2009, 06:45 PM   #6
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yeah I did that one my bike I was trying that but its still about 5 mph fast
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Old 02-24-2009, 06:55 PM   #7
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do you have access to a gps? if so just get your actual speed vs indicated speed (with speedohealer disbaled) put those into the calculator and done.
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Old 02-24-2009, 06:58 PM   #8
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5mph fast at what speed?

we can give you a percentage to try to add to the equation for speedo change.
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Old 02-24-2009, 07:00 PM   #9
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Quote:
Originally Posted by CaligoneTx View Post
5mph fast at what speed?

we can give you a percentage to try to add to the equation for speedo change.
if it's 5 mph to fast at his "post-healed" speed it won't do anyone any good, you can only have one ratio in at a time, (can't put a ratio on top of a ratio).

take it back to off, get your speed, calculate done. or just best guess with sprocket calculator. the faster you do your test at the more accurate your results.
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Old 02-24-2009, 07:05 PM   #10
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at 30 I was actually going 24
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Old 02-24-2009, 07:06 PM   #11
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a percentage is a parabola, no?

so why couldnt we? we would need the speed difference and the current noted speed. Find the change or difference in the speed and apply that to the formula.

example 5 mph off at 60mph:

65/60=x/1 x= .923 or 92.3% of the correct mileage, 7.7% off.

Am I wrong?
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Old 02-24-2009, 07:07 PM   #12
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if you really want to get it right, get with me and we will go out to a straight strech of road. mine is calibrated to less than +/- 1 mph. We will go up 70 and hold it steady and you can get your speed, then calculate the necessary ratio.
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Old 02-24-2009, 07:08 PM   #13
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Quote:
Originally Posted by yellowjacket View Post
at 30 I was actually going 24
A higher speed may be easier and more accurate and easier to adjust to. In other words, try 60mph; that way you set for that speed and not hope its close after the calculation.

This is why I like yellowbox lol
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Old 02-24-2009, 07:08 PM   #14
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Quote:
Originally Posted by CaligoneTx View Post
a percentage is a parabola, no?

so why couldnt we? we would need the speed difference and the current noted speed. Find the change or difference in the speed and apply that to the formula.

example 5 mph off at 60mph:

65/60=x/1 x= .923 or 92.3% of the correct mileage, 7.7% off.

Am I wrong?
i suppose if you want to work out the entire equation then you could find the answer. but you can't do that via the calculator.

yellowjacket how do you know you are going 24 when the speedo says 30? that leads me to believe you have a way of getting your actual speed. like i said, best option (even says so in the installation manual) get your indicated speed vs actual speed and calculate it that way.
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Old 02-24-2009, 07:09 PM   #15
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Quote:
Originally Posted by Pyrofallout View Post
if you really want to get it right, get with me and we will go out to a straight strech of road. mine is calibrated to less than +/- 1 mph. We will go up 70 and hold it steady and you can get your speed, then calculate the necessary ratio.
It would be off more at a higher speed. Its a percentage difference since we are working with amplitudes. Mine is accurate per police scanners up to 150 but begins to increase after that.
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Old 02-24-2009, 07:10 PM   #16
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Quote:
Originally Posted by CaligoneTx View Post
A higher speed may be easier and more accurate and easier to adjust to. In other words, try 60mph; that way you set for that speed and not hope its close after the calculation.

This is why I like yellowbox lol

How do you calibrate the yellowbox?

24/30 is a big difference, seems more like a calculation error to me. The estimation calculator was pretty close when I did mine, then I cleared it and did it the right way.
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Old 02-24-2009, 07:10 PM   #17
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Quote:
Originally Posted by Pyrofallout View Post
i suppose if you want to work out the entire equation then you could find the answer. but you can't do that via the calculator.
add the 7.7% into the equation now option 1 for speedo indifference... w the sprocket change
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Old 02-24-2009, 07:11 PM   #18
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Quote:
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It would be off more at a higher speed. Its a percentage difference since we are working with amplitudes. Mine is accurate per police scanners up to 150 but begins to increase after that.
Not sure you get what I am saying. The best way to calibrate a speedo healer is to get your bikes indicated speed WITHOUT the speedohealer. Use that and your actual speed to calibrate. The higher the speed, the more noticeable the difference will be and the more accurate your calculation will be.
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Old 02-24-2009, 07:12 PM   #19
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Quote:
Originally Posted by Pyrofallout View Post
How do you calibrate the yellowbox?
It has everything mapped out already. Or they do it for you. Their system uses switches to adjust manually. I can change it in .25% increments as I ride to adjust it w a scanner, GPS, etc.

He is off significantly... more so then the sprocket change would have done without changing the speedo. Maybe it went the wrong way, instead of subtracting it added the percentage?
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Old 02-24-2009, 07:14 PM   #20
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Quote:
Originally Posted by CaligoneTx View Post
add the 7.7% into the equation now option 1 for speedo indifference... w the sprocket change
But that calculation has to be done with his speed WITHOUT the speedohealer. If he is saying after programming his speedohealer he is getting 24 actual for a 30 indicated and you use that on the speedohealer calculator it will give you a ratio. but that is the ratio of how wrong your speedohealer is, not how wrong your actual speedometer is. programming a new value will erase the original value, therefore put him at a totally different incorrect speed.
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