Acura Integra All Integra Except ITR

Sway Bars?

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Old Oct 4, 2001 | 09:34 AM
  #26  
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Default Re: Sway Bars? (allenp)

it's nice to see that someone is open to dialogue and not critical or argumentative in their comments. I think we all can learn something here.
Very well said!!! I'm glad that you viewed it as an open and informative discussion. I just hope that others understand that and do not view it as an argument.


I'd like to open by saying (and trust me, I'm not blowing my own horn, just trying to add some credibility to my statements) that I have a bachelor's degree in mechanical engineering and took several high-level design courses that focused on suspension design, vehicle dynamics, and vehicle testing. My daily job includes in-vehicle testing and evaluation of drivetrain components. So I feel I have a fair amount of education and experience to back my statements. And this is in no way meant to discredit BSQ or anyone else, please don't take that the wrong way.
Thanks for the background information. It defenitely adds credibility and validity to your points.


Strut tower tie bars do in fact react. If you were to place a strain gauge on a tie bar and take a corner, you would see actual compression. The motion is dramatically smaller than a anti-roll (sway) bar, but there nonetheless. Any piece of metal, no matter how big, will deflect a given amount with a given amount of force.
Yes, this is correct. If a force is applied on an object, the object will exert and equal force in the opposite direction. So in this sense you can say that it is reacting.


In function and theory, sway bars and tie bars ARE the exact same device. They are both structural members that connect one corner of the vehicle to the other, and they both increase the roll stiffness of that end of the car. The difference is one connects the suspension components, and one connects the chassis components.
I still do not agree with this statement. The function of a tie bar/strut bar (upper or lower) is to prevent chassis flex. The upper prevents flexing between the shock towers. The lower prevents flexing between the lower suspension mounting points. The function of a swaybar, as described in the Grass Roots Motorsports article, is "Put simply, an anti-roll bar is a U-shaped metal bar that links both wheels on the same axle to the chassis. Essentially, the ends of the bar are connected to the suspension while the center of the bar is connected to the body of the car. In order for body roll to occur, the suspension on the outside edge of the car must compress while the suspension on the inside edge simultaneously extends. However, since the anti-roll bar is attached to both wheels, such movement is only possible if the metal bar is allowed to twist. (One side of the bar must twist upward while the other twists downward.) So the bar's torsional stiffness-or resistance to twist-determines its ability to reduce body roll. Less twisting of the bar results in less movement into jounce and rebound by the opposite ends of the suspension-which results in less body roll."


The Handling Chart that BSQ cites is a good general guideline. But, it does not apply to every vehicle and every situation. So it's not a final answer... It says that to reduce understeer, you want more rearward weight distribution. This may be generally true, but there are definite exceptions.
This is true. The chart which I referred to is just a general guideline. It cannot tell you by how much to increase the rear spring rate to reduce understeer. One thing to note about the chart is that you do not see where there is any reference to strut tower/tie bars. That is, there is not a column which says to add front or rear strut tower bar to affect understeer or oversteer. This is because strut tower bars are not used as a suspension tuning device. They are used for chassis tuning. So when you think of suspension tuning, think swaybars. When you think of chassis tuning, think strut tower bars.


Now if everyones head wasn't hurting before, there is a good chance that it is now
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Old Oct 4, 2001 | 10:11 AM
  #27  
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Default Re: Sway Bars? (BSQ)

Now if everyones head wasn't hurting before, there is a good chance that it is now
Yeah..it does hurt, but in good way! There is tons of information in this thread! In the end, I believe my view on the way a sway bar works is in agreement with BSQ's. The "twisting" of the bar is what makes it "active". Just my .02.......
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Old Oct 4, 2001 | 12:51 PM
  #28  
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Default Re: Sway Bars? (GSR-REX)

/brain explodes
Thanks for all the input. I have a whole new understanding (and migrane)
Sooooo... I will have to go back later and re-read everything to figure out what is best for me.
What I want to get rid of is Tire hop and having my whole car slide when i go into a turn. Most of the roads here are a little curvey, and want to be able to handle them well.

Thanks again, am going to get a tylenol.
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Old Oct 4, 2001 | 01:04 PM
  #29  
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Default Re: Sway Bars? (GSR-REX)

Just go and buy one. It'll do something for ya.
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Old Oct 4, 2001 | 03:39 PM
  #30  
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Default Re: Sway Bars? (BSQ)

Brett,
my shocks are set to 4 all the way around. My tires at 32 psi all the way around. Yes I have stock Michelins.
how should I tune my suspension and tire pressure to increase understeer? I was thinking changing my back shocks to 3 but not sure about tire pressure. thanks.
mm
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Old Oct 4, 2001 | 04:02 PM
  #31  
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Default Re: Sway Bars? (1fastGSR)

Brett,
my shocks are set to 4 all the way around. My tires at 32 psi all the way around. Yes I have stock Michelins.
how should I tune my suspension and tire pressure to increase understeer? I was thinking changing my back shocks to 3 but not sure about tire pressure. thanks.
mm
I would recommend changing the rear shocks to 3 or even possibly 2. On the tire pressures, I would recommend upping the pressure to 33-34 psi on the rear tires. Try making these adjustments and see how the car feels. If the car still feels like it want to oversteer at the limit, the add another 1-2 psi to the rear tires. HTH, let me know if this improved your handling.
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Old Oct 4, 2001 | 07:35 PM
  #32  
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Default Re: Sway Bars? (Lildrgn)

when u go to buy a swaybar, only get the rear one and get a skunk 2 or ITR swaybar I have heard nothing but good responce for these setups!
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Old Oct 5, 2001 | 01:54 AM
  #33  
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Default Re: Sway Bars? (Lildrgn)

It's nice to see a civilized, informative, and intelligent discussion in this thread. From my point of view both of you make sense. I can see allenp, why you say that they are similar devices because of the fact that the chassis itself flexes too. What you're saying makes perfect sense. However, I have to agree with what BSQ is saying. The simple fact that the swaybar is attached to the suspension which is supposed to move as opposed to the chassis which in a perfect world should not move makes all the difference. Like everyone else though, I'm ready and willing to learn so I'm all ears to anything all you guys have to say.

What I want to get rid of is Tire hop and having my whole car slide when i go into a turn. Most of the roads here are a little curvey, and want to be able to handle them well.
Lildrgn, I think simply replacing your tires would solve your problem with the sliding but I suppose you already know that. About the wheel hop issue, have you looked into the Z10 radius arm kit? I have no personal experience with it myself but from what I've read, it seems to be very promising.

edit: typo


[Modified by agent87, 3:05 AM 10/5/2001]
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Old Oct 6, 2001 | 06:40 AM
  #34  
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Default Re: Sway Bars? (BSQ)

Okay, cool, it seems like everyone's on the same page now.. We don't need to debate semantics anymore!

Yes, there is a difference between chassis and suspension tuning. And tie bars are for chassis tuning, sway bars for suspension. But if you break it down to the bare theory, it is still the same idea.

Plus, there's not much point in doing suspension tuning if your chassis is made of spaghetti! But fortunately, Honda provides us with one of the stronger chassis out there. Not that tie bars don't help...

Okay... I think we've about wrapped this topic up...
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Old Oct 6, 2001 | 08:22 AM
  #35  
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Default Re: Sway Bars? (allenp)

where can i get the beaks or bsq kit
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Old Oct 6, 2001 | 09:11 AM
  #36  
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Default Re: Sway Bars? (sicilian2k1)

where can i get the beaks or bsq kit
You can get my BSQ mounting kit at http://www.geocities.com/bretq/mounting_kit.html
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Old Oct 6, 2001 | 09:21 AM
  #37  
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Default Re: Sway Bars? (sicilian2k1)

I know everyone is recommending the ITR, comptech, and skunk2 bar but I think you should heed allenp's warning, especially since you have an LS. The stiff bars mentioned above give a stong enough tendency to oversteer on a GSR but it will be even more on an LS because the LS only has a 22mm front roll-bar vs the GSR's 24mm front roll-bar.

I personally am going to get the ST rear bar because:

1)19mm
2)much cheaper than Neuspeed
3)heard it is direct bolt-on no modifications
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Old Oct 6, 2001 | 10:51 AM
  #38  
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Default Re: Sway Bars? (Muglit)

The stiff bars mentioned above give a stong enough tendency to oversteer on a GSR but it will be even more on an LS because the LS only has a 22mm front roll-bar vs the GSR's 24mm front roll-bar.
I have read a lot off comments from people lately saying that by upgrading to a larger rear swaybar, such as the Type-R or Comptech, that this will cause oversteer. But, I can honestly say that I have NEVER experienced oversteer on the street in the 3.5+ years that I have had my Type-R rear swaybar installed. And I have honestly tried to get my car to oversteer, just to see if I could get it to happen, and I couldn't make it happen. I'm also sure that many of you have heard that the Integra Type-R is the most balance front wheel drive car there is. And a majority of the reason for that balance is because of the combination of the 24mm front swaybar and 22mm rear swaybar. Now I'm not saying that there isn't a possibility that oversteer might happen, but I think that the possibility is very slim. Remember there are other thing which affect handling (eg. tire pressure, shock settings, spring rates, tires, etc.) besides swaybars. Also, if you do upgrade any suspension component the car is going to behave differently, so I recommend "relearning" how you car behaves and reacts after an upgrade before taking it to the "limit'.

One last note, all 2000-2001 Integras have 24mm front swaybars, prior to that RS and LS had a 22mm.
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