How much stiffer with solid or tied in roof? |
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How much stiffer with solid or tied in roof? |
Mueller |
Dec 12 2004, 11:17 AM
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#1
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
New car has no cage, I know the 914 tends to flex and that the factory welded steel roofs on the 916 for what I guess was to help stiffen them, or was it for other reasons??
The 'glass top should help a little, but I was wondering about attaching tubes or the like from the factory roll bar to the windshield hoop to stiffen the car up.... Has anyone played with this before?? |
John |
Dec 13 2004, 11:43 PM
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#2
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member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
You guys surely jest....
The A-pillar weak. Please. Have you ever cut a windshield off? There is a bunch of steel in there. Several thicknesses of sheet metal. Potentially, in a hard collision, the windshield frame may try to crack at the point where the rigid frame meets the rest of the unit body. Those "stiffening plates" In my opinion were put there to reinstall a previously cut-off windshield frame. Our cage has been tied into our windshield frame for over 16 years of track time and our windshield frame has not cracked off. Now, I admit that there are some high stress concentrations in the windshield frame/cowl/fender area. We noticed that the fender/cowl interface is under considerable stress when we welded the cowl/fender joint and it kept cracking/moving. We ended up cutting that area apart and replacing the steel in the area, but the area continues to do strange things especially at the sharp corner at the rear edge of the front trunk lid. |
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