 Stiffening the framework |
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| Rand |
 Mar 11 2005, 07:54 PM
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Cross Member  Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None  |
I'm looking into ideas to strengthen my car. Not a full cage, just a few tubes. I've read the classic threads and I'm in awe of the caliber of guys (like Brad, Jeroen, etc) we have offering help around here... hoping for your comments on this...
My goal is an aggressive street car that is strong enough for a V8 conversion. I'm looking for the simplest way to add some strength (with the least amount of added pieces). It's all about function and I don't need to be concerned with racing classifications and rules. I'm thinking the first stage is bracing from the rear shock tower to firewall, then inside firewall to frame rail, something like the red bars in this image: (IMG:http://www.4nets.com/baldwinpowersports/images/stronger1.gif) Is the firewall a strong enough part of the structure to use this way (if the tubes are just welded to their respective side of the firewall)? Or should the tubes go through the firewall, welded directly to each other at the top, and another down tube tied in (like the green)? |
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| SirAndy |
Mar 11 2005, 11:25 PM
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Resident German Group: Admin Posts: 41,669 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
what brad was trying to tell you is that our cars have a weak spot right where the big blue line is.
you need to address this even more if you stiffen up the rest of the chassis. the forces you put on the chassis will be exactly the same, with or without stiffening. stiffening one area only means the forces will be shifted to other areas. from your drawing, the weak spot in a 914 (lost of twist) will see *amplified* twist forces now that you have stiffened up other parts of the car. especially with a V8, if you don't do anything to that area, it *WILL* crack right there. i have seen it before ... (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) Andy Attached image(s) 
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Posts in this topic
Rand Stiffening the framework Mar 11 2005, 07:54 PM
SirAndy ... Mar 11 2005, 08:04 PM bondo Be careful about doing this sort of thing. You can... Mar 11 2005, 08:25 PM r_towle you would be transfering a dynamic load to the mid... Mar 11 2005, 08:28 PM xsboost90 with an interior long reinforcement kit, that coul... Mar 11 2005, 08:33 PM r_towle thus the cross bracing.. Mar 11 2005, 08:36 PM Brad Roberts Hi Randy http://www.914world.... Mar 11 2005, 08:37 PM riverman You might want to look at Brad Mayeur's stiffe... Mar 11 2005, 08:40 PM Brad Roberts |
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