Hud and Speedo Not in Sync - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-03-2005, 11:43 PM   #21
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Quote:
know cops have to have calibrated speedo'* if they use them to record your speed. How do they calibrate a speedo?
Around here, they take the cruiser to a section of highway that has been measured as one mile. They get the cruiser up to the desired speed, hold it there for the mile, and time how long it takes to cover that distance, then calculate the actual speed.
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Old 01-04-2005, 09:11 PM   #22
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IF you look at the bottom of a Crown Vic Police Interceptor speedo it says 'certified calibration' It is done at the factory and then I think its up to the department recertify it if needed.

Jay
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Old 01-04-2005, 09:51 PM   #23
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mine used to be about 3-5off...

until i ripped apart my dash, and had to put the needles... 15 miles of country driving and i finally got em perfect...i think my boost gauge is still a lil low though
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Old 01-08-2005, 03:24 AM   #24
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i recently had a similar problem....
it was caused by my bro.... he hit the english/metric button.
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