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#16
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I am confused as to how a hydropneumatic setup would remove or significantly reduce the understeer. The range of geometry would be the same, the absorption response time is different but a car going from 3400lbs with a 53/47% F/R* weight distribution to ~4000lbs with tire, wheel variables being the same.
It seems plausible but the physics doesn't seem to add up using all 70's technology. *(reference bgkast post #51 in Handling limits of the W123?) |
#17
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The W123 geometry itself is OK,it's the same as the W116.
The advantage of installing the hydro suspension is that it makes the suspension work because of the infinitely variable nature of the hydro . The front struts,instead of collapsing under load (braking etc) as springs do,the energy is absorbed and the car retains it's correct attitude with the forces being transfered to rear where the rear suspension has anti squat geometry. The same thing can be achieved with stiffer springs but then you have car that rides like a ricer ,bouncy on it's tyres with little actual springing. With the incorrect spring rate in the front,Understeer goes from being predictable to down right dangerous as the weight is transfered to a point on the road ahead of the car. Imagine a scalene triangle out the front the car. the longest side being the road surface. the shortest being vertical from the axle center line. The upper side being the direction of the force. The triangle becomes larger as the car speed rises . This causes the short side of the triangle to become longer exerting a leverage on the car body,in effect lifting the rear in air. because the suspension arms are being forced up and they have in built understeer ,this becomes more acute the higher the rear rises,this forces the tyres to lose traction giving a plowing effect. Last edited by mercmad6.3; 03-24-2010 at 10:34 PM. |
#18
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Ha! I know that car! There's an old shop next to it with lots of antique auto gear, right?
The guy wanted like 3,000$ for it a few years ago. He didn't like my offer of 650$. -CTH |
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