 Speedo recalibration, I'm really not going that fast. |
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| Cevan |
 Aug 20 2007, 08:38 AM
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Senior Member  Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351  |
I just bought a '75 1.8 last week, 54K miles (please insert "This post is worthless without pictures" here). I've put about 300 miles on the car in the last 6 days. (IMG:style_emoticons/default/driving.gif)
My speedometer and odometer both work in my car. However, on the highway, I noticed that the odometer would record a mile in roughly .9 miles. I used the mile markers on the Mass Pike. The speedometer also appears to read a little fast. The tires are 195/60-15 Yokohamas. I'm assuming the tire diameter is less than the stock tire that the speedo was calibrated for. The question: Can the speedo be recalibrated? If so, how? |
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| swl |
Aug 20 2007, 08:00 PM
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Senior Member Group: Members Posts: 1,409 Joined: 7-August 05 From: Kingston,On,Canada Member No.: 4,550 Region Association: Canada |
Nice looking car! Looks to be in great shape.
I'm not an expert with the speedo but I would imagine the speedometer could indeed fall out of spec. From what I have read the odometer is just a bunch of gears. It should never go out of whack. If you can get a stretch of maybe 10 miles with mile posts try that to get your calibration. The extra distance will add to the accuracy. If the odo is that same 10 % as the speedo then I'm lost in my understanding of how this stuff works. Assuming of course the tire size calculator doesn't have a bug in it. Does any one know what the ratio was for the 165sr15? I've never seen it expressed with the sidewall ratio. |
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Posts in this topic
Cevan Speedo recalibration Aug 20 2007, 08:38 AM
derekdenman Mine does the same thing. I am going to a place t... Aug 20 2007, 09:30 AM Cap'n Krusty Rather than going to "a place that does speed... Aug 20 2007, 09:41 AM rhodyguy this is common. have someone pace you with a car t... Aug 20 2007, 09:52 AM swl According to the tire size calculator your 195/60 ... Aug 20 2007, 05:23 PM Cevan It seems closer to 10%. Here are a few pictures o... Aug 20 2007, 07:32 PM
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