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Old 07-08-2012, 08:48 PM   #1
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That's A Fast Mo-Fo.
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Old 07-08-2012, 09:25 PM   #2
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This was posted a bit back over on Renntech:

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You can calculate the approx ground speed at fuel cut off for all gears as follows:

5 sp. forward gears (std 17" tyres)

("current engine rpm"/1000)*5*("transmission gear#")= "x" mpg

i.e. for 3rd gear at redline (7200/1000)*5*(3)=108 mpg

I've noticed that interesting relationship before while driving; the gears are almost exactly evenly separated so you can approx groundspeed knowing only rpm and gear. This is for the 5sp only on the Boxster std.
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I agree for street driving why would you need a S ;-)

*** Now for all the owners of an S to chime in ****
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Old 07-08-2012, 09:35 PM   #3
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Why wouldn't you want an S? What part of more power, more torque, and closer gear ratios would a person not like?
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Old 07-08-2012, 09:40 PM   #4
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5 speed...

- 1st gear 3.50
- 2nd gear 2.118
- 3rd gear 1.429
- 4th gear 1.029 G86/00 (1.09 G86/01)
- 5th gear 0.79 G86/00 (0.838 G86/01)
- Final Drive 3.89 G86/00 (3.56 G86/01)

6 speed...

- 1st gear 3.818
- 2nd gear 2.20
- 3rd gear 1.516
- 4th gear 1.216
- 5th gear 1.024
- 6th gear 0.841
- Final drive 3.444

Type those numbers into this page and you can see exactly what the advantage is...
Top Speed Calculator
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