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Swaybars for a staggered setup

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Old Dec 4, 2012 | 09:29 PM
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Default Swaybars for a staggered setup

Hello everyone, I am looking for some guidance in choosing a set of swaybars for my 2000 Z28 M6. It is mostly a street car that sees the drag strip every so often (maybe 6 times a year or so). I don't do any street racing but sometimes drop the hammer on the street to have a little fun (397 rwhp with a 150 shot on top).

The goals I am trying to accomplish is a more responsive feeling in the handling of the vehicle and an overall flatter cornering vehicle. There are no plans to do any autocross or road racing. I would like to stay with hollow swaybars only in order to save weight. Right now I am running ground control coil overs (550lb/in springs up front 160lb/in springs out back), Bilstein shocks, poly roto rear LCA's, poly/poly panhard rod, relo brackets, 2 point SFC's. I am torn between going with the Strano bars since (35mm/22mm) and the BMR bars (35mm/25mm). My reasoning behind possibly going with the BMR's is because I am running a staggered wheel and tire setup...18x10 Riken Raptor 275/35/18, and 18X11 305/35/18 555R drag radials out back. I am thinking that since the Strano bars are set up around a non staggered set up, I might be better off going with the 35/25mm BMR's because I have such a large differential in grip from front to rear. Thanks in advance everyone.
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Old Dec 5, 2012 | 10:12 AM
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Contact BMR, they have great Handling Performance packages/sway bars
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Old Dec 5, 2012 | 12:01 PM
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"Handling" seems to mean something different to different people. A lot of people think handling means "stiff". I consider handling to be a balance. A car that handles well has just the right amout of everything in order to make the car easiest to handle through a course in order to have the best chance to win.

For a lot of people who just drive on the street, they just want a quicker response and stiffness in their car. If that's the case then going with bigger bars is probably better all around. While it makes it tougher to control on a road course, lots of people dont see a road course nor drive the car at limits like that. So stiffness makes the car feel like it's got a better suspension to them.

If you want more of my definition of handling, then you want Strano's bars with the adjustable rear bar. That will give you something around the range of the 25mm hollow when on the highest setting, better for drag racing. All other situations, the lowest setting is most likely key.
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Old Dec 5, 2012 | 01:26 PM
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Originally Posted by KTK Z28
Hello everyone, I am looking for some guidance in choosing a set of swaybars for my 2000 Z28 M6. It is mostly a street car that sees the drag strip every so often (maybe 6 times a year or so). I don't do any street racing but sometimes drop the hammer on the street to have a little fun (397 rwhp with a 150 shot on top).

The goals I am trying to accomplish is a more responsive feeling in the handling of the vehicle and an overall flatter cornering vehicle. There are no plans to do any autocross or road racing. I would like to stay with hollow swaybars only in order to save weight. Right now I am running ground control coil overs (550lb/in springs up front 160lb/in springs out back), Bilstein shocks, poly roto rear LCA's, poly/poly panhard rod, relo brackets, 2 point SFC's. I am torn between going with the Strano bars since (35mm/22mm) and the BMR bars (35mm/25mm). My reasoning behind possibly going with the BMR's is because I am running a staggered wheel and tire setup...18x10 Riken Raptor 275/35/18, and 18X11 305/35/18 555R drag radials out back. I am thinking that since the Strano bars are set up around a non staggered set up, I might be better off going with the 35/25mm BMR's because I have such a large differential in grip from front to rear. Thanks in advance everyone.
You are correct in your assumption that the 25mm bar will be more beneficial to your application.
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Old Dec 5, 2012 | 01:52 PM
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I make a 3 way adjustable rear bar for just such an application. This way you can choose what works best. The bigger rear tire is not in any way such a massive change that you'd need a 3mm change in bar size. I know that sounds like "not much" but it's a HUGE change in stiffness.. on the order of about 70% different.

See, 1mm in bar diameter adds a lot of roll stiffness. And it's exponential. 1mm added between say 21 and 22mm is a bigger increase than 1mm added between 17 and 18mm (just example numbers, not anything f-body specific size wise).

I'll go a step further. *IF* you were hell-bent on a 25mm bar, I have those too.... I just don't list them on the site because I don't think it's a wise way for most folks to go, and I have an adjustable version of that as well.
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Old Dec 5, 2012 | 10:04 PM
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you can use threaded rod stock and some nuts for a adjustable sway bar end.
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Old Dec 6, 2012 | 01:42 PM
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Originally Posted by Sam Strano
I make a 3 way adjustable rear bar for just such an application. This way you can choose what works best. The bigger rear tire is not in any way such a massive change that you'd need a 3mm change in bar size. I know that sounds like "not much" but it's a HUGE change in stiffness.. on the order of about 70% different.

See, 1mm in bar diameter adds a lot of roll stiffness. And it's exponential. 1mm added between say 21 and 22mm is a bigger increase than 1mm added between 17 and 18mm (just example numbers, not anything f-body specific size wise).

I'll go a step further. *IF* you were hell-bent on a 25mm bar, I have those too.... I just don't list them on the site because I don't think it's a wise way for most folks to go, and I have an adjustable version of that as well.
Thank you for your response Sam. I was not aware that the 3mm change in difference would be so drastic... I am not hell bent on a 25mm bar, I am simply looking to optimize my set up and not have to "rebuy" parts. It sounds as if the adjustable 22 may be the best way for me to go. Just for reference, would adjusting the 22mm bar to the stiffest setting mimic a hollow 25mm bar? I took a look at your site and also saw that the end links are adjustable. I am guessing that those end links are to pre load the swaybar for more stiffness? Thank you again for all the helpful information.
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Old Dec 6, 2012 | 01:44 PM
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It's close... about like a 24mm solid. You can use the links to adjust preload if you want... or just how the bar sits under the differential housing.
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Old Dec 7, 2012 | 12:19 AM
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Originally Posted by Sam Strano
It's close... about like a 24mm solid. You can use the links to adjust preload if you want... or just how the bar sits under the differential housing.
So is the adjustable rear sway bar pretty much:

22 at lowest setting
23 at middle setting
24 at highest setting?
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Old Dec 7, 2012 | 10:22 AM
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Pretty much that's right. Each hole is not like a 2mm change, shortening the lever arm stiffens the bar, but not that much, not to have the equivalent of 22, 24, 26mm.. It's effectively around what a 1mm on a solid bar, per hole.
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