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You see the same thing in home audio speaker cables, even though double blind studies have been done showing that they make no difference. But by god, they would love to sell you a $3K speaker cable! And they make a definite and noticeable improvement. To the seller's wallet. |
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Don't forget, this v-bar have limit of flex it allow the chassis to do, so without v-bar vs this v-bar is totally different. This also this reduce wear of the chassis. Hope that make sense. |
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I see what's going on here so I will support my previous statements one last time with the manufacturer's own admission and then politely bow out. Notice the teeny tiny text in the bottom right corner of that promo video. For the vision impaired, it says "Actual movement is 0.1mm or less." http://i.imgur.com/5eyLJtL.png |
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While, it's expensive AND a bit pointless for some... I still think it do make a difference. Just like door stabilizer and rear window aero stabilizer... it make less 0.01cd and 1% chassis more rigidity. Improvements are improvements. Don't have to agree with them. That's one of the reason why I haven't bought one yet. |
These decrease rigidity. They might drop NVH, but that's easy to test. Take off the braces of the stock car and see if the car is any quieter and more comfortable. That would eliminate all transference of vibration. If it is more comfy without the braces, then there's a case to be made. Otherwise, snake oil.
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0.1mm is just a shade under 4 thousands of an inch. Even if those springs are 1000 lbs per inch linear rate springs, and there is zero play in the system, at the very most they will exert 4 lbs of force on the firewall. You could literally make a bigger difference to the rigidity of the car, no bars vs the TRD parts, by pushing your foot on the fire wall. I'd be will to bet a small amount of money that wind resistance, over the area of the fire wall, makes more of a difference to the rigidity of the car. It's snake oil, man. |
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As Gram pointed out the guys that pay up for these will of course say there is an improvement due to "placebo effect" (technically called confirmation bias) since it was expensive and the theory is sound it MUST make a difference. |
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That part doesn't make sense. More flex means more wear. There might be less audible NVH transferred to the cabin, but there's no way this could improve chassis life. |
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Geez, I'm getting attack by everyone here lol
@Calum, enjoyed your example. Foot on firewall... & you're prob right that putting foot on the firewall will prob get more rigidity. At the same time, you can't keep the foot on the firewall all the time or keep same pressure all the time. @Tcoat, you didn't get the fast & furious pun. I just changed it to mm & inches instead inch & mile, c'mon now. As for 1% vs 0.0001%, are you factoring stock struts & springs w stock tires? Or are you factoring stiffer suspensions with R-Comp tires? Put the smartass comment a side, I'm pretty sure there are some placebo effect for this part... at the same time, you cannot deny this part from get-go. Because it make less than 0.01mm movement and it cost near $900 doesn't mean, it's POS money sucking part that doesn't do anything. There's a reason TRD made this part (& god damn expensive too), reason prob 1% or less of 86/BRZ will understand. @venturaII, making the chassis hard doesn't mean it's helping the chassis' life. Important part of chassis is, there need to have spot to absorb/release the stress within the chassis. Way1, I'm lazing to click "mention". Lol I'm not saying door stabilizer doesn't work. What I said was, it makes small effect, but it still makes a difference. I know it works, specially on aftermarket suspension. |
Not attacking at all - just discussing. :)
All these appear to do is prevent the NVH from reaching the passenger compartment at the expense of rigidity. It doesn't prevent the NVH from occurring in the first place. All you'd be doing is isolating the effect to a different area of the chassis. Flex is flex, and allowing the chassis to flex more is going to work the metal harder. Maybe the amount is negligible in terms of practical life, but I rather doubt even that, as you'd see the OEM braces being removed from the cars if only for the benefit of a quieter cabin. Removing chassis braces (or allowing more chassis movement) will not result in a longer lasting chassis, nor will it make the suspension 'work better'; quite the opposite, in fact. |
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