[byebye2u]

care to elaborate?
how?
for downhill.

Heavy object drop faster than lighter object .....cabut...

[jhlk99]

care to elaborate?
how?
for downhill.

The ratio of front tyre contact force to rear tyre contact force increases when the car is facing downhill (if my calculations are not wrong) so this means that the front wheels have more traction (or at least lose traction less quickly than the rear as the angle of the slope increases). This has several implications for how the car performs. The first is that a FWD with a forward weight bias will now have even more loading at the front so it can be accelerated harder before the driven wheels lose traction (true even on a straight downhill stretch). The RWD, OTOH, will not have as much dynamic loading at the rear because it has to make up for the forward transfer. I don't know how much difference this makes.

The second effect is that the higher loading on the front axle will allow the FWD to apply more power to the wheels in bends to pull the car around. RWD cars will not be able to take advantage of this increase in traction, their driven wheels will actually experience a reduction in traction and they will have to be driven harder to get the traction back (a bit of a death wish when you are driving down a mountain road). Again, I don't know how much of a difference this makes.

Finally, the higher loading on the front may mean that a car with weight biased to the front can attack the corners faster (no power applied) to go in hot, brake hard and pull the car around the bend. Here, I am really guessing what the effect is. Maybe the car will have less understeer and become more neutral or even oversteer a little, which will improve the handling of most FWD cars but I think that might make a RWD car more lethal.

Jonathan

[byebye2u]

The ratio of front tyre contact force to rear tyre contact force increases when the car is facing downhill (if my calculations are not wrong) so this means that the front wheels have more traction (or at least lose traction less quickly than the rear as the angle of the slope increases). This has several implications for how the car performs. The first is that a FWD with a forward weight bias will now have even more loading at the front so it can be accelerated harder before the driven wheels lose traction (true even on a straight downhill stretch). The RWD, OTOH, will not have as much dynamic loading at the rear because it has to make up for the forward transfer. I don't know how much difference this makes.

The second effect is that the higher loading on the front axle will allow the FWD to apply more power to the wheels in bends to pull the car around. RWD cars will not be able to take advantage of this increase in traction, their driven wheels will actually experience a reduction in traction and they will have to be driven harder to get the traction back (a bit of a death wish when you are driving down a mountain road). Again, I don't know how much of a difference this makes.

Finally, the higher loading on the front may mean that a car with weight biased to the front can attack the corners faster (no power applied) to go in hot, brake hard and pull the car around the bend. Here, I am really guessing what the effect is. Maybe the car will have less understeer and become more neutral or even oversteer a little, which will improve the handling of most FWD cars but I think that might make a RWD car more lethal.

Jonathan

hi Jonathan, tumpang your house sat.

I still feel that with more weight to the front the car will be more understeer no matter uphill,flat or downhill corners. The car must be slowed down more compare to 50/50 car or rear heavy car before entering corner, especially if it rwd.

Tried to put a brake with nose heavy car in the middle of corner and the steering sure feel very heavy and the car tend to go straight unless the car comes equipt with ebd and traction control.

for rear heavy in the same situation, the rear tyre will overtake the front tyre and could end spinning like gasing. Done it with iswara..he he he he (but don't know iswara front or rear heavy?)

shorter wheel base would be good in corner too..( later somebody cut and joint the car for better cornering pulak)

but from my over 200 times gerik to jeli road, once tried E60 525...really fantastic and deserve to be call UDM

NIK

[jhlk99]

hi Jonathan, tumpang your house sat.

I still feel that with more weight to the front the car will be more understeer no matter uphill,flat or downhill corners. The car must be slowed down more compare to 50/50 car or rear heavy car before entering corner, especially if it rwd.

Tried to put a brake with nose heavy car in the middle of corner and the steering sure feel very heavy and the car tend to go straight unless the car comes equipt with ebd and traction control.

for rear heavy in the same situation, the rear tyre will overtake the front tyre and could end spinning like gasing. Done it with iswara..he he he he (but don't know iswara front or rear heavy?)

shorter wheel base would be good in corner too..( later somebody cut and joint the car for better cornering pulak)

but from my over 200 times gerik to jeli road, once tried E60 525...really fantastic and deserve to be call UDM

NIK

No, you are confusing more force at the front with more mass at the front. On a horizontal surface, more force equals more mass for a static case but this is not what is happening when the car is on a slope. The increased force (this is a misnomer because the force actually decreases but the ratio of front to back increases) at the front from being on a slope is not the same as increasing the force at the front by moving mass forward. On a slope, the CoG of the car remains in the same position but the force on the axles change because of the slope. This means that the front wheel can sustain a higher lateral force but still has the same mass (we should talk of moments of inertia) around there to move around the bend. You get a similar effect by braking hard into a turn because the dynamic load on the front axle temporarily increases so the wheels have better traction (same way a RWD gets more traction at the back during acceleration).

Jonathan

[gatkheetan]

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[davewills]

BMW really have good dish for people which love driving vibrant feel with no compromising ride comfort. Poeple whom understand this feel usually will have some sort of 'emotional bond' on a car. So they take attention more to it condition inside away.

[diver]

Haha, I like your quote. BMW = Banyak Masuk Workshop. That day I was driving, saw a sticker.

MPV = Melayu Punya Van.....

More quotes:

BMW - Banyak Makan Wang
- Boleh Memuaskan Wanita
- Bring My Whisky

[fitz9666]

More quotes:

BMW - Banyak Makan Wang
- Boleh Memuaskan Wanita
- Bring My Whisky

Wahhaaaa like the phrase! just to share my experienced after almost 7 years owned a bimmer..those phrase was just a myth.. if u send ur bimmer to kedai pokok chery with no sophiscated tools can cause u a nightmare! Please send ur bimmer to a proven bmw's specialist..u may save a bulk in ur pocket. the maintenance cost is acceptable Except the Absorber.. (recently changed)