[DeTomaso] RPM - MPH Conversion

[Dan Courtney]

Michael,

I actually have two GPS units, but I successfully used one of these calculators when I was preparing to run the Silver State Challenge  about eight few years ago and they are a great tool for planning tire diameters (and gear ratios if you have the $).
Also, the tach is easier for me to keep an eye on, if I can figure an accurate conversion (which I suppose I can just do from comparing the GPS speed at different rpms). The regular speedometer (which I don't have anyway) is less than helpful with the tire diameter change. 

Dan

  ----- Original Message ----- 
  From: michael frazier 
  To: Dan Courtney ; detomaso at realbig.com 
  Sent: Thursday, September 18, 2008 7:42 AM
  Subject: RE: [DeTomaso] RPM - MPH Conversion


  Not good enough...
  Just use a GPS like everyone else and watch the average speed indicated as well as the current speed readings.  Try to make things as simple as possible, not the other way around.  The less dinking around you do in the car the better you and everyone else will be.
  Michael

  > From: dfcex at pacbell.net
  > To: detomaso at realbig.com
  > Date: Thu, 18 Sep 2008 06:24:23 -0700
  > Subject: [DeTomaso] RPM - MPH Conversion
  > 
  > Since "The Beast" does not have a speedometer, I was trying to figure how to calculate my speed off the tach, just to make sure I'm doing at least 95mph at the Silver State so I can for sure get those $2mil US off The Dawg.
  > The following link calls for rpm, tire diameter (27.2"), and gear ratio (.705, right?). I think I have the wrong gear ratio because it says I'll be doing 49,947,234 miles per hour at 4,000 rpm's.
  > "The Beast" is damm fast but it ain't quite that fast.
  > Any mathematicians out there?
  > http://www.k3pgp.org/uct.htm
  > 
  > Dan
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