| Re: Non-linear speedometer error [message #370661 is a reply to message #370652] |
Sun, 09 October 2022 11:09   |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma:
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The standard is 1000 spedo cable revolutions per mile. First you have to get that correct. Once that is correct, then the odo will be correct. And spedo errors are then in the head calibration. There used to be speedometer shops. My friend worked at Henry the speedometer man in Oak Park IL. They fixed such things, installed aftermarket cruise and add-on knee knocker underdash AC as you did in the 70s. With a correctly working speedo, I don’t think there is a spot on add-on gear corrector box ratio that fixes 3.07-3.42 swap. Cinnabar did my 3.42 and added the in line box and mine is off a bit too. Maybe reads 3 high at 70? I have not noticed a nonlinear issue though. I will have to experiment next time coach is out.
John Lebetski
Woodstock, IL
77 Eleganza II
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