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#1
08-12-2003, 09:54 AM
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Mph?
I recently went from 185/70R13 tires to 205/70R14 tires. Does this change my speed to where i'm going faster than what my speedometer says? Or am I going the same speed as my speedometer says?
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debbie 
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#2
08-12-2003, 10:05 AM
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go to Whalen Tire and go to the tites section. They tell you the changes made to your car (revs per mile, speed, etc) depending on your new tire size. I replaced my stock 195/60R/15s with 225/40/18s and it said when I am going 60mph, my speedo will say 59.7. Not bad at all. But some cars have much more of a difference.
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ECNATSISER AL AVIV 
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#3
08-12-2003, 02:17 PM
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Your speedometer is underestimating your actual speed by 8.3% so if your speedo shows 100MPH you're actually going 108.3MPH.
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#4
08-12-2003, 03:24 PM
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Aaaahhh. Good observation. I never did those calculations. makes sense. Thats a much more noticalbe difference. How would I get this adjusted? Is it a matter of reprogramming the ECU (which I have NO idea how to do) or is it a mechanical adjustment???
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ECNATSISER AL AVIV
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#5
08-12-2003, 03:34 PM
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i think places like pep boys or places that sell and install rims will adjust your speedo...not free ofcourse
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The name's Adrian 1990 Civic HB Si - 265.7whp/223tq @9.2psi. Tuned on NepTune by J.Mills 1991 Civic Sedan DX - 296.3whp/230tq @1bar. Tuned on NepTune by J.Mills 1991 Civic Sedan DX - 185.8whp/139tq. Tuned on NepTune by J.Mills 2006 G35 Coupe 6MT - Stock 2011 CR-Z - Stock
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#6
08-12-2003, 03:41 PM
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I would check out the accord portion of this site or accord specific site.
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