TwinTurbo.NET: Nissan 300ZX forum - I get just about the same MPH that you do, I used
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Subject I get just about the same MPH that you do, I used
     
Posted by SirpriZ on July 30, 2005 at 7:44 PM
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In Reply To Re: MPH = tire diameter x RPM divided by gear ratio posted by Zenica on July 30, 2005 at 07:16 PM
     
Message a 25" tire diameter (for the 275/35/18) and got 203 and 186 MPH respectively. If the tires are about 1/2" taller then your numbers sound right on. I used 24.5" for stock diameter tires and wheels and get 189 MPH at 7200RPM, with a manual. It sounds like you do get it based on your calculations for the auto in 4th gear. I don't know which thread you meant where the calculations seemed off, but your projections sound on the money. Take care, Mark

     
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