strut rower brace and differential
#12
01-18-2008 | 08:14 AM
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RE: strut rower brace and differential
Let me clarify a bit with another cartoon. Assume the car is in a right turn, on the left the suspension is closed with a strut bar which stiffens the structure just like you close and tape a card-board box, on the right is the stock configuration, no strut bar.
In a hard right turn, due to weight transfer, the out-pulling force is experienced at the upper strut mount, this is the primary reason for the strut bar so the load can be shared by two struts. Now look at this from the whole car pespective, the rigid structure on the left of the cartoon is more prone for the inner wheel (right wheel for this case) to lift up in the air. Without the strut bar, two struts are connected via car body, so the body flex more, and suspension geometry may not be maintained as well, but exactly due to this, the inner wheel could still have traction.
It's certainly benefitial to stiffen up the suspension, but if the 3 is already stiff enough (which I really don't know how to quantify), beefing it up more could have detrimental effect along with the assumed benefit.Wheel lifting updue to super stiff suspension can be experienced not onlyduring cornering, it can happen on rough terrain as well.
It'd makehuge sense thatstrut bar should go with limitedslip differential, not an open one. Adding strut baris benefitial, don;t get me wrong, but there's another side of the coin, esp. w/ open differential.
(again, if the inner wheel is up in a turn w/open diff, no torque could be transferred to the outer wheel, however, if you tap on the brake, there then will be torque transfer, counter-intuitive, but true.)
[IMG]local://upfiles/13140/D9A23A478EE149369BD46ACDE27EAD75.gif[/IMG]
________
Web shows
In a hard right turn, due to weight transfer, the out-pulling force is experienced at the upper strut mount, this is the primary reason for the strut bar so the load can be shared by two struts. Now look at this from the whole car pespective, the rigid structure on the left of the cartoon is more prone for the inner wheel (right wheel for this case) to lift up in the air. Without the strut bar, two struts are connected via car body, so the body flex more, and suspension geometry may not be maintained as well, but exactly due to this, the inner wheel could still have traction.
It's certainly benefitial to stiffen up the suspension, but if the 3 is already stiff enough (which I really don't know how to quantify), beefing it up more could have detrimental effect along with the assumed benefit.Wheel lifting updue to super stiff suspension can be experienced not onlyduring cornering, it can happen on rough terrain as well.
It'd makehuge sense thatstrut bar should go with limitedslip differential, not an open one. Adding strut baris benefitial, don;t get me wrong, but there's another side of the coin, esp. w/ open differential.
(again, if the inner wheel is up in a turn w/open diff, no torque could be transferred to the outer wheel, however, if you tap on the brake, there then will be torque transfer, counter-intuitive, but true.)
[IMG]local://upfiles/13140/D9A23A478EE149369BD46ACDE27EAD75.gif[/IMG]
________
Web shows
Last edited by wineye; 09-15-2011 at 05:21 PM.
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