From: xenolith@optusnet.com.au   
      
   On 19/8/20 1:42 pm, Xeno wrote:   
   > On 19/8/20 9:43 am, thekmanrocks@gmail.com wrote:   
   >> AMuzi:   
   >>   
   >> re: Corvair   
   >>   
   >> The Corvair had a Front/Rear weight difference that   
   >> definitely warranted the big difference between   
   >> recommended front and rear cold tire pressures.   
   >>   
   >> The cars I'm talking about are somewhere in between   
   >> that extreme, and the other: rear- and all-wheel drive   
   >> sports sedans with almost no(less than 55/45) front-rear   
   >> weight bias.  The last time I checked, a typical BMW   
   >> F/R weight split is like 51/49%. Yet recommended   
   >> front/rear pressures differ by 5psi.   
   >>   
   >> My Honda Accord, for example, is F/R: 54/46% axle   
   >> weight split.  Some 'econoboxes' venture toward 60/40,   
   >> yet for the Accord and those cars, a single pressure   
   >> figure, for all tires, is specified on the door frame placard.   
   >>   
   > Varying the tyre pressure will vary the slip angles at which the tyres   
   > run. The *specification* of that variation, ie. different pressure F &   
   > R, will ensure the car runs understeer rather than oversteer.   
   > Manufacturers design cars to oversteer and, depending on the suspension   
   > design, tyre pressure variation is the way to ensure it.   
   >   
   Make that; "Manufacturers design cars to *understeer*".   
      
   --   
      
   Xeno   
      
      
   Nothing astonishes Noddy so much as common sense and plain dealing.   
          (with apologies to Ralph Waldo Emerson)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)