Re: Changing speedo gear???
[Re: A727Tflite]
#2251106
02/10/17 04:37 PM
02/10/17 04:37 PM
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Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
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You can disagree all you want - what do you have to back it up? My actual measurements...try it yourself.
The INTERNET, the MISinformation superhighway
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Re: Changing speedo gear???
[Re: BDW]
#2251235
02/10/17 08:37 PM
02/10/17 08:37 PM
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Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
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Example, the manufacturer of my 235/70R15's says they are 28" in diameter but the rollout is 84" which equates to a diameter of 26.73".
The INTERNET, the MISinformation superhighway
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Re: Changing speedo gear???
[Re: Sxrxrnr]
#2251743
02/11/17 06:25 PM
02/11/17 06:25 PM
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Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
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At the risk of repeating myself, I think it's ill-advised to change a speedo pinion based on a GPS speed readout; the odometer is the best indicator of correct/incorrect pinion, not the speedometer. If the odometer is correct, then any speedo error is in the head, not the pinion.
The INTERNET, the MISinformation superhighway
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Re: Changing speedo gear???
[Re: John_Kunkel]
#2251799
02/11/17 08:02 PM
02/11/17 08:02 PM
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Joined: Jan 2003
Posts: 338 Montreal Quebec
STROKIE
enthusiast
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enthusiast
Joined: Jan 2003
Posts: 338
Montreal Quebec
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At the risk of repeating myself, I think it's ill-advised to change a speedo pinion based on a GPS speed readout; the odometer is the best indicator of correct/incorrect pinion, not the speedometer. If the odometer is correct, then any speedo error is in the head, not the pinion.
Thank you John, for the clarification. That's why I like Moparts.com
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Re: Changing speedo gear???
[Re: STROKIE]
#2252816
02/13/17 05:33 AM
02/13/17 05:33 AM
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Joined: Jul 2013
Posts: 1,272 Northern Calyfornua
Sxrxrnr
pro stock
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pro stock
Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
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At the risk of repeating myself, I think it's ill-advised to change a speedo pinion based on a GPS speed readout; the odometer is the best indicator of correct/incorrect pinion, not the speedometer. If the odometer is correct, then any speedo error is in the head, not the pinion.
Thank you John, for the clarification. That's why I like Moparts.com The above illustrated app if you forego the 'free' version and step up to the paid version(2 bucks was what I paid) you get among other niceties, includes odometer support and a history/log file. . The cost of a small order of fries at Macdonald's. What could be simpler and more effective?
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Re: Changing speedo gear???
[Re: Sxrxrnr]
#2252912
02/13/17 01:32 PM
02/13/17 01:32 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Agreed, with the right speedo gear the ODO will automatically be corrected & most always then the magnetic gismo speedo will also be correct & if not then the speedo head in that rare case will need to be sent to a speedo specialty shop to be recalibrated (or another one at a boneyard may be cheaper).
live every 24 hour block of time like it's your last day on earth
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Re: Changing speedo gear???
[Re: BDW]
#2253588
02/14/17 04:09 PM
02/14/17 04:09 PM
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Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
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The same size tire from the same manufacturer can be different in diameter due to coming from different molds and the diameter of the same tire will vary with the width of the wheel it's mounted on.
The INTERNET, the MISinformation superhighway
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