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  1. usafdarkhorse

    Speedo reads low when ambient temp is cold, accurate when hot

    Primers, First, details: 1990 Honda NSX that reads speed in kilometers per hour. I'm running into a head scratcher. I noticed a few months ago that I felt like I was going pretty fast down a stretch of road I normally take. Too fast. I used a GPS app to confirm my suspicion that I was going...