Roll Cage, Back Bracing |
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Roll Cage, Back Bracing |
Randal |
Feb 2 2009, 08:18 PM
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#1
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
What is the minimum amount of bar that would need to be added from the back towers to the transmission cross member? Understanding that I am running a bar from the back hoop of the cage to the shock tower.
Could I just run a bar from a plate on the rear side of the shock, midway to the top of the transmission cross member? Just a simple triangle. Would that help? Picture below. |
Brett W |
Feb 23 2009, 10:45 AM
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#2
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Advanced Member Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None |
A word of advise. Get multiple reinforcements on those door bars. They will fail if hit hard enough.
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Randal |
Feb 23 2009, 10:26 PM
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#3
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
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ChrisFoley |
Feb 24 2009, 01:13 PM
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#4
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
A word of advise. Get multiple reinforcements on those door bars. They will fail if hit hard enough. OK, so I guess you mean gussets in the interior X on the door bars? Or on the outside of the door bars? What you have there is plenty stiff from a chassis flex perspective Randal. The concern is being T-boned and having the door bars break in the middle. Last year at Lime Rock someone got hit by a Miata and the Miata's front bumper got all the way to the center console of the other car because the X bars tore where there is only a single tube thickness. Use taco gussets (plate bent into a U shape so both inside and out are reinforced) on the top and bottom of the X. Reinforcing the front and back triangles of the X won't do a thing for side impact protection. Gusseting the ends of the X bars is much less important. |
Randal |
Feb 24 2009, 02:29 PM
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#5
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
A word of advise. Get multiple reinforcements on those door bars. They will fail if hit hard enough. OK, so I guess you mean gussets in the interior X on the door bars? Or on the outside of the door bars? What you have there is plenty stiff from a chassis flex perspective Randal. The concern is being T-boned and having the door bars break in the middle. Last year at Lime Rock someone got hit by a Miata and the Miata's front bumper got all the way to the center console of the other car because the X bars tore where there is only a single tube thickness. Use taco gussets (plate bent into a U shape so both inside and out are reinforced) on the top and bottom of the X. Reinforcing the front and back triangles of the X won't do a thing for side impact protection. Gusseting the ends of the X bars is much less important. Do you have a picture of a taco gusset? I wouldn't be worried about the reinforcement just running autox's, but hill-climbing is a different game. |
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