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Old 04-22-2013, 12:45 PM   #1
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Default rollbar to windshield header brace

Hmm, now I want a 'V' version of this brace, 2 points of the V on the header, one point in the middle of the rollbar:



(Note I'm not saying this will substitute for a cage, I just want a more rigid chassis. Yes I have the butterfly, door bars et al already)
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rollbar to windshield header brace-img_0175.jpg  
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Old 04-22-2013, 02:15 PM   #2
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I've always wondered what, if anything, this would do for rigidity.

I assumed it simply 'cured' some chassis NHV but added little in terms of structure/rigidity. I'd be concerned about windshield longevity.

-Zach
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Old 04-22-2013, 05:29 PM   #3
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Makes my head hurt just looking at it.

Helment mandatory.
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Old 04-23-2013, 09:56 PM   #4
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Bicycle helmet.
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Old 04-24-2013, 03:39 PM   #5
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Here's my V brace idea

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Old 04-24-2013, 03:42 PM   #6
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I cannot imagine how that would possibly be a better alternative to a full on cage.

Actually it looks like itd be the worst of both worlds.
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Old 04-24-2013, 04:16 PM   #7
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Quote:
Originally Posted by hornetball View Post
Helment mandatory.
+1

For me, the probability of having a 5 mph accident on the way to the track where my head strikes a bar like that and I die is infinitely higher than the probability of rolling the car on track where that bar would make the difference.
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Old 04-24-2013, 04:43 PM   #8
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Quote:
Originally Posted by 18psi View Post
I cannot imagine how that would possibly be a better alternative to a full on cage.

Actually it looks like itd be the worst of both worlds.
It is NOT a substitute for a cage, nor something to improve rollover protection.
It is to reduce NVH.

The rollbar behind the driver's head is MUCH closer than the V-bar.
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Old 04-24-2013, 04:52 PM   #9
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I get what you're saying, but think that's a bit over the top for NVH to be honest.
You're basically running almost a full cage, with all the dangers that come with driving it on the street without a helmet, but without all the benefits.
I'm surprised you're still unhappy with frame rails, door bars, and a roll bar in an nb.

But I dunno much more on this since I don't even have a roll bar, so I'll just bow out of the conversation lol
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Old 04-24-2013, 05:00 PM   #10
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Forgive my noobness Jason, but I assume you have already seam welded the chassis up? I don't feel like researching 8 years of posts to find out.
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Old 04-24-2013, 05:13 PM   #11
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Related (especially because Jason posted in it) but you guys should read this thread on the same (sortof) subject.

Windshield header to rear cockpit cross brace - MX-5 Miata Forum

It's worth it, trust me.
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Old 04-24-2013, 05:22 PM   #12
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Quote:
Originally Posted by thenuge26 View Post
Forgive my noobness Jason, but I assume you have already seam welded the chassis up? I don't feel like researching 8 years of posts to find out.
Seam welded door openings only. I seriously doubt more seam welding will be anywhere as good as my suggested V-bar.

Quote:
Originally Posted by 18psi View Post
I'm surprised you're still unhappy with frame rails, door bars, and a roll bar in an nb.
Because drove Boxster.

Quote:
You're basically running almost a full cage, with all the dangers that come with driving it on the street without a helmet, but without all the benefits.
Has benefit of NVH reduction. Realistically any increased risk is still lower than riding a motorcycle. Yet if someone suggests this kind of bar, lots of people say "too dangerous", but not if I say "I just bought a Gixxer".
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Old 05-22-2013, 03:18 PM   #13
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is the brace bolted to the windshield frame?...is this a custom job?...need to be able to carry surfboards on the roof with the top down and i think this would be my best route.
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