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From Wikipedia:
"On September 1, 1979, in a regulation that also regulated speedometer and odometer accuracy, the National Highway Traffic Safety Administration (NHTSA) required speedometers to have special emphasis on the number 55 and a maximum speed of 85 mph (137 km/h). However, on October 22, 1981, NHTSA proposed eliminating speedometer and odometer rules because they were "unlikely to yield significant safety benefits" and "[a] highlighted '55' on a speedometer scale adds little to the information provided to the driver by a roadside speed limit sign."
Although you can't believe everything in Wikipedia, this seems accurate. I am the second owner of my 1981 911SC and it might be possible that it was changed.
If the law was repealed in late 1981 to early 1982, I would think possibly some of the 1982 models might still have the 85 speedos, but not in 1983? Anyone with a 1983 SC got a 85 mph speedo?
Last edited by aoncurly; 02-23-2012 at 11:02 AM..
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