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How far off is my speedo?

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Old Feb 5, 2006 | 08:47 PM
  #1  
lil305gta's Avatar
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Joined: Aug 2000
Posts: 342
From: Volkel AB, Netherlands
How far off is my speedo?

I swapped in a set of 3.73 form a stock 3.23, how far + or - should my speedo be?
Old Feb 5, 2006 | 08:51 PM
  #2  
95nicotineZ
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Re: How far off is my speedo?

Try this, you have to figure tire size, too.

http://www.dakota-truck.net/TIRECALC/tirecalc.html

Google your question and see what comes up.

-Dave
Old Feb 5, 2006 | 10:49 PM
  #3  
Injuneer's Avatar
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Joined: Nov 1998
Posts: 71,122
From: Hell was full so they sent me to NJ
Re: How far off is my speedo?

Your speedo will read 15.5% higher than actual road speed. That would be a 70mph indication at a true 60mph. You are also adding miles to your car faster.... when you drive 1,000 miles, your odometer reading will increase by 1,155 miles.

To calculate it:

3.73 / 3,23 = 1.155
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