Adding torsional rigidity, How do I get the front half tight? |
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Adding torsional rigidity, How do I get the front half tight? |
phillstek |
Jun 23 2010, 06:39 AM
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#1
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Member Group: Members Posts: 350 Joined: 19-May 10 From: Byron Bay, Australia Member No.: 11,741 Region Association: None |
Once again I prevail upon the expertise here.
I have stiffened the rear of the car substantially, as shown in pics. Tubes go from rear towers through engine bay and firewall to rollbar. Rollbar is plated to longs and strapped to upper seat belt mount. There is a lateral bar (profiled to clear fan housing) in the engine bay. Car has the plates around the control arm consoles as well. So the back end is solid but I'm not sure how to get the front section solid. I'm thinking a bolt-in bar triangulating as far forward from rollbar to long (one each side like on some factory gt's). Maybe a bolt-in from front towers to rollbar (through fresh air vents, which don't work anyway). I don't want to weld in the bars as I won't be able to road register the car if I do. I don't want to re-inforce the longs with a weld in kit. The car seems to move around the scuttle and I have cracked a windscreen to prove it. Clearly the car twists in this area and this is what I want to stop. Any suggestions, links and advice would be appreciated. Thanks, Phil |
Joe Ricard |
Jun 23 2010, 07:49 AM
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#2
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
The only way to do what you need it to tie the front and back together. via a cage.
With nothing in the middle the car will twist like a noodle right in the middle of the door openings. when I did my race car I had gage tied to rear suspension upper shock towers. In front I tied a cross bar between the A-pillar cage bars. and then tied those intersections to the front shock towers. then with 1" tubes tied front shock towers to the front torsion bar pick ups. in an X fasion. and also put the front sway bar in a tube and tied that in with bars too. Car was damn stiff for a rookie boy wannabe racer. |
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