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....Rollbar Construction/ Fabrication Design Questions....

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Old 04-13-2009, 03:07 PM
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Question ....Rollbar Construction/ Fabrication Design Questions....

I am going to be having a custom fit 6 point style rollbar installed. The car is a daily driver with limited track use . The purpose of installing a bar is for safety in an accident on public roads. All these idiotic fools who can't drive coupled with the illegals with no license or insurance is making me a bit paranoid. so in short my questions are as follows:

1. would using thicker guage chromoly just for the door bars (in relation to the main hoop same diameter) be better for absorbing a side-impact or should the whole rollbar be the same guage throughout?

2. would thicker guage chromoly help in a side impact situation?

3. would boxing the joints be usefull for a side impact?

4. would steel or chromoly be better for side impact absorbtion? I know chromoly has some "memory" and give before it will snap unlike steel but perhaps I don't want the door bars to give any in this situation? (not like I would want them to snap either lol)

couple of things cost is no concern and neither is weight but I don't want to go the cage route as I have heard it is not safe in an accident in which the passengers are not wearing helmets- which I won't be. I will be retaining stock side impact door bars and the car weight is around 2,000 pounds (significantly lightened 240sx lsx conversion).
Old 04-15-2009, 07:26 AM
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The door bar does next to nothing to help in a side impact and may actually hurt you more than not having it. if you wanted to make something for side impacts you need to start looking at something like this



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