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-   -   roll bar holes (http://www.clubcobra.com/forums/cobra-build-logs/114013-roll-bar-holes.html)

wachterg 01-17-2012 06:54 AM
roll bar holes
 
anyone no where there is a drawing for drilling holes for roll bar on ac cobra

patrickt 01-17-2012 08:15 AM
This will get you close. Note the left brace is generally in line with the rear trunk line. The front braces should be exposed behind the seat, if you can do that with your particular car. make the holes small at first, and then enlarge your holes to fit your bar.

http://www.clubcobra.com/photopost/d...ollbar0011.jpg

mreid 01-17-2012 09:00 AM
The holes are completely dependent on where the frame mounts are located (or frame members for attaching mounts) which is completely dependent on the manufacturer. In other words, it depends on who made the car and the year it was made.

patrickt 01-17-2012 09:22 AM
Quote:
Originally Posted by mreid (Post 1171255)
The holes are completely dependent on where the frame mounts are located (or frame members for attaching mounts) which is completely dependent on the manufacturer. In other words, it depends on who made the car and the year it was made.
That's only if you want it to actually do something when you flip the car.:rolleyes: A lot of the cars have "cosmetic" roll bars... and I'm thinking of the Contemporary I almost bought a zillion years ago. If you want it to support the car while you're sliding upside down, then you're going to have to take it to the frame, or equally strong supports.

patrickt 01-17-2012 09:32 AM
In the "thanks for telling me" column...
 
http://www.clubcobra.com/photopost/d...osmetic001.jpg

patrickt 01-17-2012 09:35 AM
And these babies look cosmetic to me...
 
http://www.clubcobra.com/photopost/data/500/blemish.jpg

mreid 01-17-2012 10:08 AM
Yeah, I remember my old Classic Roadster said the same thing. At the time I found that confusing. I always thought it was a "roll" bar, not a "show" bar.

patrickt 01-17-2012 10:12 AM
Quote:
Originally Posted by mreid (Post 1171268)
... I always thought it was a "roll" bar, not a "show" bar.
It's a role bar, since it's playing the part of a real one.:cool:

mreid 01-17-2012 10:16 AM
Bwahahahahaha!

Hey, at least somebody laughs at your jokes.

RACER X #99 01-17-2012 10:46 AM
Quote:
Originally Posted by patrickt (Post 1171260)
I don't know what that means but my Contemporary Roll bar attached to the frame rails just like the ERA bars.
Contemporary was just being realistic in that neither roll bar was actually sufficient by today's standards. No race club will allow you to race with the standard hoop available on any brand replica including Shelby and Kirkham.
They are all just cosmetic rollbars like Contemporary pointed out 25 years ago.

patrickt 01-17-2012 10:52 AM
Quote:
Originally Posted by RACER X #99 (Post 1171277)
I don't know what that means but my Contemporary Roll bar attached to the frame rails just like the ERA bars.
Contemporary was just being realistic in that neither roll bar was actually sufficient by today's standards. No race club will allow you to race with the standard hoop available on any brand replica including Shelby and Kirkham.
They are all just cosmetic rollbars like Contemporary pointed out 25 years ago.
I'm taxing my memory, but I recall discussing this very issue with Peter B. in the early 80's and, as I recall, it was not the mounts but the roll bar itself. I'm pretty darn sure that I was assured at the time that a true, heavy duty steel roll bar could be obtained elsewhere and that it would "do the trick." I think I'm sure of that, but it's going on 30 years now so it's possible I'm wrong.%/

patrickt 01-17-2012 10:55 AM
... and by the way, ERA states specifically that their roll bar is actually functional.:cool: Roll bar

mreid 01-17-2012 11:08 AM
As does Kirkham. I also do remember that that Classic Roadster cosmetic bar was little more than bent exhaust tubing. And just to be clear, that was on a Sebring MX, don't know about their cobra.

RACER X #99 01-17-2012 12:52 PM
Quote:
Originally Posted by patrickt (Post 1171280)
... and by the way, ERA states specifically that their roll bar is actually functional.:cool: Roll bar
There is a big difference in functional and race approved.

What Peter Bayer was telling you in writing is that your roll bar is not approved as roll over protection.
Just a disclaimer that's all.

None of the hoops are approved for real racing. They allow them in vintage racing but that"s about it.

patrickt 01-17-2012 12:55 PM
Quote:
Originally Posted by RACER X #99 (Post 1171295)
There is a big difference in functional and race approved.

What Peter Bayer was telling you in writing is that your roll bar is not approved as roll over protection.
Just a disclaimer that's all.

None of the hoops are approved for real racing. They allow them in vintage racing but that"s about it.
But surely, given the choice, you would opt for a "actually functional" roll bar, as opposed to a "for cosmetic purposes only" roll bar, would you not?:cool:

RACER X #99 01-17-2012 03:44 PM
Quote:
Originally Posted by patrickt (Post 1171296)
But surely, given the choice, you would opt for a "actually functional" roll bar, as opposed to a "for cosmetic purposes only" roll bar, would you not?:cool:
Evidently you don't know what I meant by disclaimer.

I remember asking Peter just what does cosmetic purposes mean and his explanation to me was that even though it might support a car on a rollover it was not made for racing and therefore it was listed as for cosmetic purposes only. Makes sense to me.

In 1966 the single hoop was an acceptable form of roll over protection in race cars. In 1980 it was not, it was a cosmetic roll bar as far as racing was concerned. I know the roll bar in my Contemporary mounted directly to the frame and it most certainly would support the car in a tip over. In a serious high speed, high impact roll it probably would not.
It was just as strong as any roll bar meant for street use just like the ones in any number of street Cobras.
Serious track guys (like the FFR group) opt for a more substantial roll bar.

and by the way, ERA states specifically that their roll bar is actually functional.

Ask them if it's approved for racing.

mickmate 01-17-2012 03:52 PM
The CCX roll bars were just too thin on the wall with seamed tubing. Some of them had little or no mounting on the rear brace. The shorties to fit under a hard or soft top weren't tall enough or strong enough to be of any use. They are somewhat akin to the exhaust tubing ornamental roll bars on Jeeps and Pickemups. I know where you can get functional ones for a couple of different breeds. The thread originator (remember him ;-)) didn't tell us what frame it was for did he? Mreid had the skinny for him on it though.

patrickt 01-17-2012 04:14 PM
Quote:
Originally Posted by RACER X #99 (Post 1171328)
Evidently you don't know what I meant by disclaimer.
You're right, I bet I don't.:cool:

Quote:
Originally Posted by mickmate (Post 1171331)
The CCX roll bars were just too thin on the wall with seamed tubing. Some of them had little or no mounting on the rear brace. The shorties to fit under a hard or soft top weren't tall enough or strong enough to be of any use. They are somewhat akin to the exhaust tubing ornamental roll bars on Jeeps and Pickemups.
"Cosmetic" is the wrong word. "Ornamental" is more appropriate.:LOL:


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