Roll cage 1991 civic hatch
02-10-2007, 05:27 PM
#33
1.5 BAR
Join Date: Jan 2003
Posts: 1,037
Re: Roll cage 1991 civic hatch
Ohh, that jegs kit looks like it fits pretty well, how much did you have to do to get it to fit like that?
BTW, from what I can figure out, It doesn't really matter if the bars tie into the frame. If you have a side impact bar run right along the floor between the A pillar bar abd B pillar bar, and a cross bar along the floor on the hoop (along with any other needed bars) then the car can deform as much as it wants to. The goal of a cage is to do exactly that, build a cage around the driver/passenger to prevent intrusions. Mounting points have more to do with the side effect of a cage, which is increasing chassis stiffness.
I've been working on a design for my car for awhile now. My plan is to have a impact bar about 1" off the floor, plus nascar style side impact protection. My car is being built for NASA/SCCA so my hoop must have a diagonal, and I'll double that into an X. The harness bar will be like yours, but I want to add a bar that will cross the tunnel about 1/2" above it. The A pillar bars will be reinforced to the upper windshield bar and hoop with tube diagonals 8-12" from the intersects. The seat will be mounted to the cage, instead of the floorpan. There will also be a cross bar under the dash, which I'll use to mount my pedals and stering column. The rear braces will be tied into a cross bar between the strut towers, and I may put an X brace in there as well, because I am well under minimum weight spec as is.
BTW, from what I can figure out, It doesn't really matter if the bars tie into the frame. If you have a side impact bar run right along the floor between the A pillar bar abd B pillar bar, and a cross bar along the floor on the hoop (along with any other needed bars) then the car can deform as much as it wants to. The goal of a cage is to do exactly that, build a cage around the driver/passenger to prevent intrusions. Mounting points have more to do with the side effect of a cage, which is increasing chassis stiffness.
I've been working on a design for my car for awhile now. My plan is to have a impact bar about 1" off the floor, plus nascar style side impact protection. My car is being built for NASA/SCCA so my hoop must have a diagonal, and I'll double that into an X. The harness bar will be like yours, but I want to add a bar that will cross the tunnel about 1/2" above it. The A pillar bars will be reinforced to the upper windshield bar and hoop with tube diagonals 8-12" from the intersects. The seat will be mounted to the cage, instead of the floorpan. There will also be a cross bar under the dash, which I'll use to mount my pedals and stering column. The rear braces will be tied into a cross bar between the strut towers, and I may put an X brace in there as well, because I am well under minimum weight spec as is.
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