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Those of you who are putting on the 19mm rear sway bar better make sure that the subframe is properly reinforced by a secondary bracket or else the shear forces on the subframe caused by the stiffer bar CAN tear that section off. --Taken from Mugen.

 
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Looked at it, doesn't look necessary with only a 19mm, with a 22mm I would take that step though. Peace

 
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take what section off?

 
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I doubt it'll be a problem with a 19 mm sway bar... like Intruder says though, 22mm and you might have a problem.

although the rsx's subframe may be different from ours, they didn't need any extra reinforcement...

I got a tie bar coming in too though, and I may put that for that particular reason...

thats if I can get the darn sway bar on anyway. having trouble installing it. heh.

 
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22mm is a problem, not 19mm....maybe it was an accident[IMG]i/expressions/face-icon-small-confused.gif[/IMG]

 
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wtf? that's g-hey, show me a picture....22mm+ strut bars are installed all the time in civics w/o a problem...

 
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actually...i wouldn't go for them at all...i would go for a set front & rear (for example from Eibach or Neuspeed), because by just changing the rear sway bar to 19mm or 22mm, u make the front & rear (factory) ratio go off course...which means the rear is far more likely to slide in any turn...so instead making a SAFE car, u r making a DANGEROUS car

 
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Actually, I just read an article from Neuspeed. They backed up the earlier claim that a larger rear bar puts more stress on the lower mounts. The fix is of course a lower tie bar which would reinforce that area.

I guess if you are going to go to the effort to put in a new sway bar, spring for the tie bars and sleep at night.

 
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cool i already have the tie bar....

i think the comptech rear-sway bar comes with a built in tie bar...

 
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So what it actually better a 19 or 22. I am also going to put a DC rear lower tie bar

 
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CivicVTec: Dude, I don't know why I had that very long conversation with you about sway bars? I guess you weren't convinced about what I said?

This is a re-post of a conversation I had with CivicVTec:

I did some more calculations and I had some discussion with my father and we came to the conclusion that a 22mm sway bar is the way to go.

We checked out the stiffness compared to the weight.

So...

(22/24)^4 gives us the relative stiffness of the 22mm rear sway bar to the 24mm front sway bar. This means that the 22mm sway bar is about 70% as stiff as the 24mm front sway bar.

The weight distribution is 40% in the rear and 60% in the front. This gives us the ratio of back-to-front weight of 40/60 or 67%. This is almost the same as the stiffness ratio mentioned above. Therefore we have almost the same rear-to-front stiffness ratio as we do the rear-to-front weight ratio.

In comparison, (19/24)^4 gives us the relative stiffness of the 19mm rear sway bar to the 24mm front sway bar. This means that the 19mm sway bar is about 40% as stiff as the 24mm front sway bar.



<< Those of you who are putting on the 19mm rear sway bar better make sure that the subframe is properly reinforced by a secondary bracket or else the shear forces on the subframe caused by the stiffer bar CAN tear that section off. --Taken from Mugen. >>


What kind of second bracket? That doesn't make sense, and if it doesn't make sense, you must acquit! [IMG]i/expressions/laugh2.gif[/IMG]



<< although the rsx's subframe may be different from ours, they didn't need any extra reinforcement... >>


That's just my point. It's exactly the same, so if the JDM RSX can use a 22mm sway bar in back we can as well.



<< Actually, I just read an article from Neuspeed. They backed up the earlier claim that a larger rear bar puts more stress on the lower mounts. The fix is of course a lower tie bar which would reinforce that area. >>


Right, of course. [IMG]i/expressions/laugh2.gif[/IMG]
There is more stress put on those parts. Sheering forces that want to kind of cut the bolts holding the brackets in place. When you turn left the passenger side bracket gets an upward force and the drivers side bracket gets a downward force. Anyway, these forces are acting vertically across the subframe. Did you check that area before? The metal is nice and thick, but the force is acting downwards on it, so it'de be like trying to rip out a nail out of a piece of plywood by tugging on it sideways. You'de need to create enough force to rip through all of the plywood to get the nail out.

 
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I still don't see it. Which bar 19mm or 22mm should we use for the best performance? Would we need to use something like the DC Sports lower tie bar if we upgrade to a 19? or 22? bar?

Sorry to be dense, just over my head with this stuff.

 
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22mm is more perfect than the 19mm. 22mm with rubber bushings and front polyurethane bushings would rock. Or you could go all polyurethane with a 26mm bar up front and that would rock too. The tie bar is not necessary, but I bet that it stiffens up the rear a little bit for a more precise feel. The rear strut bar would do more for the handling though.

 
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So you are saying that I could add the Neuspeed polyurethane bushing kit to the "factory" front sway bar and then add a 22mm rear sway bar for a noticable handling improvement? Isn't Neuspeed's rear sway bar for our car going to be 19mm? Guys that are ordering the 22mm, where are they getting them from, same place as the DIY using Acura parts for the 19mm?

 
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Yeah, the Neuspeed bushings are here: Neuspeed Front 25mm Anti-Sway Bar Bushing Kit $19.95

Neuspeed is probably coming out with a 19mm bar for our cars because they don't want our cars to handle as well as the RSX's. How would that look to the RSX owners if Neuspeed were to sell one product for the RSX's and the Civics? RSX owners would be ticked off that they're getting the same crap that the civics are getting. [IMG]i/expressions/laugh2.gif[/IMG]

Anyway, here is the sway bar: ARSXSSWBJDM Type R 22mm Rear Sway Bar $81.33

There's also the issue of the front sway bar being hollow and the rear sway bar being solid, but the JDM Type R has a hollow front that's thinner than ours, so I think the 22mm will improve our handling quite nicely.

You'll also need the RSX's brackets. You can get those from www.acuraautomotiveparts.com You'll also need the 22mm bushings. I think the JDM 22mm sway bar comes with those, but I'm not 100% sure.

 
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Just ordered the Neuspeed front bushings. Before I order the JDM 22mm bar, I need to find a part number for the left & right holders & 22mm bushings. Can't seem to locate them on the Acura parts site, only the 19mm parts.

 
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<< Before I order the JDM 22mm bar, I need to find a part number for the left & right holders & 22mm bushings. Can't seem to locate them on the Acura parts site, only the 19mm parts. >>


The left & right holders are the same for the 19mm as well as for the 22mm. I'm 90% sure of that. You might want to ask someone on ClubRSX.com to be 100% sure. I'm also 80% sure that the JDM 22mm sway bar comes with the 22mm bushings. You might want to ask someone on that forum about that as well. Post here to let everyone know what the deal is, okay?

 
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The Founder & Owner of www.clubrsx.com, Chris Dye, just e-mailed me back and said that the JDM Type R 22mm sway bar does come with bushings. As far as the holders, he said that they might work, but he had not tried it to know for sure. I'll try to find someone on their board who has the 22mm Type R bar installed and ask them.

 
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22mm Strut bar on a Civic is pretty dang pointless.. 19mm Is about as large as practicality would call for.. We're pulling massive lateral G's in our cars...