View single post by 12371
 Posted: 09-08-2008 09:38 pm
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12371

 

Joined: 09-22-2006
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 I have had my speedo re calibrated to factory specs even though I've installed 205/60x13 tires.  The speedometer is way off, farther than just the tires should make it.  I stopped a local cop and had him radar me at 40 mph.  My actual speed was 35 on the nose.

The only change from stock in the drive line is a 74 transmission, my car is a 73.  Would this contribute to the variance from factory calibration?

I've also gone to several tire websites to see what they say the variance should be and it's about .80 mph, not 5 mph.

I'm also resigned to doing the "push test" to see how far off I am.

George