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Date: Wed, 25 Aug 1999 21:51:53 +0200
From: RCS <e9225126nopsam1.tuwien.ac.at>
Subject: Re: Why is it recommended that rear tyre pressures be higher than front?


RCS wrote: > 1) Inflate the front tires to maximum > 2) Deflate the rear tires > 3) Apply parking brake & turn in completely one side was missing... > > 4) Depress clutch > 5) Put in 1st gear > 6) Rev the engine up to 6.500 rpm > 7) release clutch..... > ... > > NO, sorry but this is little funny to listen... > the turning radius is nearly the same, if thereīs more pressure in the front or > back. > The turning radius gets wider, the faster you drive, cause the car has an > understeering behaviour, until the rear "looses" the contact and the back is > travelling to the outside of the corner - thatīs called oversteering and if that > happens in a bigger style youīll have a lot of work to prevent a spin, > especially when you are not accellerating (that means you havenīt dynamically > decreased the road holding capacity on the front with the gas or even release > the throttle when you are turning in). > > Thereīs a wide grip limit range, especially with the narrow standard wheels. > When you loose the grip on the rear the car is turning (better heading) into the > corner, that reduces the turning radius at a given speed. The more you inflate a > tire, the earlier you loose the grip on (from an ideal pressure onward), you > canīt really tell that for the opposite direction, cause a too soft pressured > tire "floats" and "warps" around. > > to answer your question: drive very very very very slow and if you want to win > some mm (garage) inflate the front tires, so they wonīt be deformed by the car > weight - > if you are diving normally notice above... > > -RCS- > > Filip Van Bourgognie wrote: > > > so what do I have to do to make the turning circle of my saab 900 turbo > > smaller? Blow more air in the back tyres or the other way round? > > > > <turbospgnopsamsouth.net> wrote in message > > news:37BC574C.E82F813Dnopsamsouth.net... > > > yes > > > saab racer cars like the sonett sometimes have wider tires up front (and > > wider > > > wheels) !!! > > > MArk > > > > > > > > > Van Bourgognie Filip wrote: > > > > > > > Will the turning circle be affected by different tyre pressure front and > > > > back? > > > > > > > > <turbospgnopsamsouth.net> wrote in message > > > > news:37BAFD44.957A5594nopsamsouth.net... > > > > > It just handles better that way > > > > > try it the other way, like use the 38PSI in front and 36 in the back. > > you > > > > > cant steer as fast around a corner. > > > > > > > > > > > > > > > Dean Malandris wrote: > > > > > > > > > > > I was always curious about this. Seeing as how we're talking > > > > > > front-wheel-drive, and considering most of the weight is over the > > front > > > > > > wheels, I would have expected that the front tyre pressures be > > higher > > > > than > > > > > > the rear, because of all the work the front wheels have to do. > > > > > > > > > > > > > > > > > > > > > > > >

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