Roll Cage a SHO??

[Lance Cheney]

No the rule book doesn't say anything about the angle of the back bars or were they have to be placed. I read over the book and the only thing that i can see that might apply to you is the roll bar must be with in an inch of the side pannels, and door. that starts mkaing it pretty tight to weld. most tech's don't check for that , just as long as the driver is surounded, like your sholder isn't sticking past the bar. other then that you should be away. good luck and i will try and get some pics up here soon.

Keep in mind that if you're planning on track racing the car (vs. drag racing) there are different rules that may restrict this. If you are planning on just drag racing then you obviously don't have to worry about it -- just follow the NHRA book.

For instance NASA says:

15.5.11 Rear Braces
The main hoop must have two (2) braces extending to the rear. The braces shall be attached as near as possible to the top of the main hoop, and no more than six (6) inches below the top. The braces must not contain any bends. There must be at least 30 degrees between the plane of the main hoop and the plane of the rear braces. The main hoop rear braces shall be installed to form no more than a one hundred five (105) degree angle or no less than a seventy (75) degree angle with the main hoop when viewed from the top. The main hoop braces may be mounted at the rear shock mounts or suspension pickup points (providing that the braces remain in compliance with
all other sections of the CCR). They may go through any rear bulkheads provided the bulkhead is sealed around the cage braces.

-Lance

 

[91taurisho]

Lance,
What class is this in? Does it matter if you have one different than that if you don't require a rollcage/rollbar in the class you are running in?

Kurt,
How exactly does it mount to the shoulder mounts and the base of the seats? Could you take a picture of where it mounts(in all 3 places; shoulder, base of front seat and rear)? I'd like to see exactly what you mean. That's the way I was thinking of doing mine(when I ever do it) but bringing the rear mounts up and more to the side. I may end up going to the very top of the rear strut tower just so I don't have to ruin my back seat and so I can still sit in it.

 

[Lance Cheney]

Lance,
What class is this in? Does it matter if you have one different than that if you don't require a rollcage/rollbar in the class you are running in?

So long as it's not a safety hazard (eg. it must be padded in areas where you might hit it) it should not be a problem. That specific rule appears to apply to any competetive NASA events, though I'm not 100% certain if there are exceptions. They require a 12-pt for that -- that section is just one of many, but I wanted to make sure that other people reading the thread (who might want a full cage for open tracking/future racing) noted that the rules are different for different venues and sanctioning bodies. It would suck to get one all welded in and then find out it only worked for 1/2 of what you wanted.

For example, the open-track organization that I do the most events with (Norcal Shelby club) only require a 4-pt cage if you're running a cage-required run group (I don't), and they don't have any specific rules about it that I can see.

I think the NHRA only requires a cage for <11 second cars, right?

-Lance

 

[91taurisho]

I'm think you're right about the <11 second cars. I don't figure I'll ever race in a class that I'll need more than a 5 or 6-point cage. If I do I'll have to change it but for now the 4-point should do.
Thanks!

 

[x-tream]

Yes in drag racing if you run under 11 sec. you must have a 6 point. Lance is correct about other types of racing. you should check what the rules for the type of racing you are doing well before going to the track or building a car.