Snap oversteer
01-16-2010, 04:01 AM
#21
Originally Posted by bgoetz,Jan 15 2010, 10:08 PM
With the S2k having so much weight infront of the front tires this reaction really causes a sudden and drastic weight transfer off of the rear tires and thus, an over steer situation.
01-16-2010, 04:04 PM
#25
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Don't let the Lotus folks here you say that though. They don't like us in the mid-engined club 
Great information on this thread, thanks to all the contributors.
Great information on this thread, thanks to all the contributors.
01-16-2010, 04:06 PM
#26
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Originally Posted by punchdrunk,Jan 15 2010, 04:26 AM
the rear has broken loose in a straight line
ZDan: I wouldn't mind if you explained this: "rear toe change with bump." I don't know exactly what we are talking about. Does this mean toe alters when the suspension articulates?
01-16-2010, 04:11 PM
#27
Originally Posted by trinis2001,Jan 16 2010, 05:04 PM
Don't let the Lotus folks here you say that though. They don't like us in the mid-engined club
Great information on this thread, thanks to all the contributors.
Great information on this thread, thanks to all the contributors.
01-16-2010, 04:22 PM
#28
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i would agree with driver inputs, not having smoothness makes the car lose its balance. i have made the car oversteer a few times but all done basically on purpose just testing its limits.
Front Mid engine layout.
Front Mid engine layout.
01-16-2010, 09:39 PM
#29
Originally Posted by dammitjim,Jan 16 2010, 09:51 AM
^^^ and if there was substantial weight in front of the front tires it would inhibit snap oversteer, not contribute to it.
. I was trying to generalize the weight in the front of the car, but behind the front tires. The S2k is more of a mid engine car, but it is still a front engine car. This puts a good amount of weight on the front of the car, but yes behind the front tires. This will not create a more understeer bias under deceleration, it will cause the car to oversteer.
A normal front engine car with the engine infront of the rear tires may understeer more because the weight is all shifting to the fulcrum point of the car, which is infront of the tires. With the S2k the weight shifts, but as you stated and I so elequently miss-stated, the engine (i.e. weight) is mostly behind the front tires. So the weight shifts to the front, but behind the front tires, Really putting all traction on the front tires (think of it like a hammer with all fo the weight behind the hammer) . This is what causes the snap oversteer characteristics of the S2k under deceleration
01-17-2010, 12:18 AM
#30
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Originally Posted by bgoetz,Jan 16 2010, 10:39 PM
You are correct about the weight infront of the front tires, it is not there on the S2k. I was typing faster than I was thinking .
I was trying to generalize the weight in the front of the car, but behind the front tires. The S2k is more of a mid engine car, but it is still a front engine car. This puts a good amount of weight on the front of the car, but yes behind the front tires. This will not create a more understeer bias under deceleration, it will cause the car to oversteer.
A normal front engine car with the engine infront of the rear tires may understeer more because the weight is all shifting to the fulcrum point of the car, which is infront of the tires. With the S2k the weight shifts, but as you stated and I so elequently miss-stated, the engine (i.e. weight) is mostly behind the front tires. So the weight shifts to the front, but behind the front tires, Really putting all traction on the front tires (think of it like a hammer with all fo the weight behind the hammer) . This is what causes the snap oversteer characteristics of the S2k under deceleration
. I was trying to generalize the weight in the front of the car, but behind the front tires. The S2k is more of a mid engine car, but it is still a front engine car. This puts a good amount of weight on the front of the car, but yes behind the front tires. This will not create a more understeer bias under deceleration, it will cause the car to oversteer.
A normal front engine car with the engine infront of the rear tires may understeer more because the weight is all shifting to the fulcrum point of the car, which is infront of the tires. With the S2k the weight shifts, but as you stated and I so elequently miss-stated, the engine (i.e. weight) is mostly behind the front tires. So the weight shifts to the front, but behind the front tires, Really putting all traction on the front tires (think of it like a hammer with all fo the weight behind the hammer) . This is what causes the snap oversteer characteristics of the S2k under deceleration