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 Post subject: Roll cage questions
PostPosted: Sun Apr 14, 2019 7:43 pm 
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Joined: Tue Oct 27, 2009 9:33 pm
Posts: 165
Location: Aurora, CO
Hi all
I have a CRX that was raced in ITA (it has a SCCA log book)

I am currently trying to sell this CRX, I been putting it up on face book and other places
recently someone commented that the cage is not legal

I been looking in the GCR and I can not see where it would be illegal (the drawing shows straight tubes but that is as far as I can see)

anyways asking for you experienced folks to take a look and tell me your thoughts
its and Autopower cage that has been welded

Image

David
member #229558


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 Post subject: Re: Roll cage questions
PostPosted: Mon Apr 15, 2019 1:56 am 
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Joined: Mon Jan 05, 2015 8:45 am
Posts: 168
Reference this thread where this was most recently discussed:

viewtopic.php?f=4&t=18952&start=0

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Bill H
92 Saturn SL2 - SCCA F-Production


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 Post subject: Re: Roll cage questions
PostPosted: Mon Apr 15, 2019 8:09 am 
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Joined: Tue Dec 31, 2013 10:40 am
Posts: 347
Location: Huntsville, AL
Technically, by SCCA GCR its not illegal. Its just terrible practice. Looks like some cage from an NHRA drag car builder, those guys have a real hard on for bends in the down bars. Its also a terrible idea to have to those terminate where they do behind the rear axle. Get hit hard enough in the rear and those bars can deform and damage the rest of the cage. Moving those points to the axle centerline/shock towers will allow the rear of the trunk floor to crush without affecting the roll cage.

With the bends in those bars you have already created a failure point in the down legs. The tube is no longer loaded strictly in tension and compression, but also in bending. Very bad design. I would cut them out and weld in two straight bars.

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Brett W
Huntsville, AL


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 Post subject: Re: Roll cage questions
PostPosted: Mon Apr 15, 2019 8:23 am 
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Joined: Fri Dec 23, 2011 6:59 am
Posts: 1166
Location: Spring Hill, FL.
Simply add two crossed(X brace) angled bars from the top cage corners to new landing pads in the trunk. Put the new pads in front of the pads at exist.

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Mike Ogren/Protech Racing, http://www.FWDracingguide.com http://www.ogren-engineering.com/ 352.428-8983 mogren@tampabay.rr.com


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 Post subject: Re: Roll cage questions
PostPosted: Mon Apr 15, 2019 9:24 am 
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Joined: Tue Oct 27, 2009 9:33 pm
Posts: 165
Location: Aurora, CO
planet6racing wrote:
Reference this thread where this was most recently discussed:

viewtopic.php?f=4&t=18952&start=0


thanks for the link
this car has a SCCA log book and its an Autopower bolt in cage

David posted this

Quote:
Sometimes I get a bit more crazier when reading the GCR/Rules/Roll Cage rules. I knew I had read the bends rule. The roll cage bend requirements disappeared from the 2008 GCR forward. A question would be, were the bend rules haphazardly eliminated or was there an engineering study completed before they were eliminated? Said with a grin, Rick where are you?

They were:
Main Hoop: 4 bends max., totaling 180* +/- 10*
Front Hoop: 4 bends max. or
Front downtubes: 2 bends max.
Rear hoop supports: No bends.

If any of the above bend requirements cannot be met, all components of the roll cage shall be fabricated from tubing size(s) listed for the next heavier category of automobiles.


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David Dewhurst
CenDiv Milwaukee Region
F Prod #14


so maybe that's the reason this cage is 1 3/4" instead of 1.5" tube (going the next higher tubing size)
hard to believe that Autopower would sell illegal cages

thanks all
David


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 Post subject: Re: Roll cage questions
PostPosted: Mon Apr 15, 2019 9:55 am 
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Joined: Thu Oct 03, 2002 10:34 am
Posts: 2875
Location: Wauwatosa, WI
David, do you know what year the car was issued it's first log book?

If issued previous to year 2008 your copy/past would hold true, next heavier category. As I read todays rules and if this was a new build, within my reading capabilities it would be legal with bend in rear braces. Without getting into anchor location or forces.

When all else fails call Topeka, 1-800-770-2055.

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David Dewhurst
CenDiv Milwaukee Region
F Prod #14


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 Post subject: Re: Roll cage questions
PostPosted: Mon Apr 15, 2019 10:22 am 
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Joined: Tue Oct 27, 2009 9:33 pm
Posts: 165
Location: Aurora, CO
4 APR 2000 is the year in the log book


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 Post subject: Re: Roll cage questions
PostPosted: Mon Apr 15, 2019 10:39 am 
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Joined: Thu Oct 03, 2002 10:34 am
Posts: 2875
Location: Wauwatosa, WI
From previous posts within this thread I'd say if this car is log booked for production the bent brace would be legal. Car 54 (Jim Creighton), where are you? Or send a message to Jim.

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David Dewhurst
CenDiv Milwaukee Region
F Prod #14


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 Post subject: Re: Roll cage questions
PostPosted: Mon Apr 15, 2019 10:50 am 
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Joined: Tue Oct 27, 2009 9:33 pm
Posts: 165
Location: Aurora, CO
thanks
PM sent


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