TwinTurbo.NET: Nissan 300ZX forum - Here is how the math works out......
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Subject Here is how the math works out......
     
Posted by Greg D. (Specialty-Z) on December 06, 2004 at 12:59 AM
  This message has been viewed 228 times.
     
In Reply To Re: but it might not be a good match for every car. posted by ZHOUND on December 06, 2004 at 12:53 AM
     
Message 4th gear with stock gears at 7000 RPM 146 MPH
4th gear with 4.10 gears at 7000 RPM is 132 MPH

4th gear with stock gears at 7500 RPM 157 MPH
4th gear with 4.10 gears at 7500 RPM is 141 MPH

4th gear with stock gears at 8000 RPM 168 MPH
4th gear with 4.10 gears at 8000 RPM is 151 MPH

MPH = [TIRE DIAMETER x RPM] / [GEAR RATIO x 336]

RPM = [GEAR RATIO x MPH x 336] / [TIRE DIAMETER]


Gear ratio in these formulas represents the gear ratio in your chosen gear, times the differential gear ratios. Tire diameter on most drag race tires(ie. BFG drag radials or MT ET streets) are approximately 26".

Stock gear ratios for Z32 transmission:

Auto
Manual

1st
2.784
3.214

2nd
1.544
1.925

3rd
1:1
1.302

4th
0.694
1:1

5th
n/a
0.752


     
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