HondaManR

I have a Mugen FRONT anti-roll bar (apprx. 30mm) and the stock rear anti-roll bar (apprx. 29mm).

If I put the stock front anti-roll bar back in (apprx. 28mm), would the car tend to understeer or oversteer (vs. my set-up w/ the Mugen bar)?

Basically my question is does a larger diameter front anti-roll bar increase oversteer or increase understeer?

(In FF's larger fronts increase understeer, larger rears increase oversteer)
(In FR's is it the same or the opposite?)


~Raymond

HondaManR

Oh Yeah... some people call Anti-Roll Bars: "Sway Bars."

Just like some people call Dampers: "Shocks."


~Raymond

cthree

A stiffer bar up front will cause understeer. Stiffer in rear will cause oversteer.

cthree

Oh Yeah... I have a Mugen 31mm bar up front and the stock bar in the rear and the understeer produced I offset with wider front tires (225/50/16 vs. 205/55/16). The balance for me is just about right with this combination for the track. For Autox you will want more understeer to keep the tail from coming around.

balefire

http://www.teamscr.com/sway.htm
https://www.s2ki.com/forums/showthread.php?...?threadid=16699

autox this past weekend was not fun w/o a sway!!! =(

foolio

This is also good reading:

http://e30m3performance.com/myths/Weight_T...ht_transfer.htm

"key point to remember is that the tires would generate the most grip if they were evenly loaded". A stiffer bar increases lateral weight transfer at that end, thus reducing grip at that end and increasing grip at the other end.

cthree

[QUOTE]Originally posted by foolio
[B]This is also good reading:

http://e30m3performance.com/myths/Weight_T...ht_transfer.htm

foolio

Oops.. excuse my bad English.

Try this:
A stiffer bar on one end of the car increases lateral weight transfer at that end. An increase in lateral weight transfer on one end of the car reduces total traction of the two tires at that end, due to load sensitivity.

An increase in lateral weight transfer on one end of the car reduces the lateral weight transfer of the opposite end of the car, due to "conservation of total weight transferred".

Thus cornering grip is reduced at the stiffened end and increased at the opposite end. eg. stiffen the front, increase understeer.

HondaManR

Thanks for the replies everyone!

Someone told me that the effects would be opposite for FR's compared to FF's, so I was thinking about selling my Mugen Front Anti-Roll Bar... since it actually is creating understeer I think I am going to keep it... the rear end swings like a beast even with the Mugen 31.8mm front bar!!! Scary.


~Raymond

jguerdat

Some of that oversteer may be driver-induced. A large front swaybar will help balance the car but you can still apply too much power at the wrong time and/or jerk the wheel or otherwise upset the tires' traction to caus eht rear end to swing out. Smoothness and experience will tame that - a swaybar never will.