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Old 01-01-2007, 07:37 AM
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Roll bar info

hinking of putting a roll bar in 39 and found good info on Advance Auot web site title how to build a roll bar great info and pics

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Old 01-01-2007, 02:17 PM
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Cool! If you don't have the equipment to bend your tubing with you might be able to get that done at a welding shop or hire them to build the roll bar for you.
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Old 01-01-2007, 02:20 PM
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Quote:
Originally Posted by Henry Highrise
Cool! If you don't have the equipment to bend your tubing with you might be able to get that done at a welding shop or hire them to build the roll bar for you.

We built a cage for my friends 72 Porsche and we hired a shop to do the bending. We made sure to have the measurements perfect (check, check, check again), and had a guy do all the bending.

Then we did the welding/assembly ourselves. It worked out perfect and was very cost efficient.
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Old 01-10-2007, 09:25 PM
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I wrote this a couple of years ago. You may find it helpful.
http://www.streetmachinesoftablerock...opic.php?t=217
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Old 01-11-2007, 04:36 AM
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Thanks very much for that info. ? On the 5th and 6th points. My cab is not choped and my seats are up so I can drive without killing my back,Instead of angleing down from the main bar to the frame could I extend these bars straight out =parallel with cab floor and even with the top of the seat cushion and then angle down after they pass the front door pillar thus giving me and my passenger some side protection or should I angle them down and add an extra bar for the side protection.Could thick wall 2x2 tubing be used in lieu of pipe?
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Old 01-11-2007, 09:12 AM
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Quote:
Originally Posted by luckyfasteddie
Thanks very much for that info. ? On the 5th and 6th points. My cab is not choped and my seats are up so I can drive without killing my back,Instead of angleing down from the main bar to the frame could I extend these bars straight out =parallel with cab floor and even with the top of the seat cushion and then angle down after they pass the front door pillar thus giving me and my passenger some side protection or should I angle them down and add an extra bar for the side protection.Could thick wall 2x2 tubing be used in lieu of pipe?
I assume you're describing the side bar that runs from halfway up the main hoop down to about where your left foot will be. This bar is designed to keep you in the car in the event the seat/shoulder belts fail. As viewed from the side of the vehicle, it must pass your body between the shoulder and the elbow. You can always run more bars than are called for in the rule book, but you must build the roll bar to the minimums described in the rulebook if you are going to pass NHRA technical inspection.

Thickwall 2x2 tubing is not acceptable if you plan to pass NHRA technical inspection. Minimum size for a roll bar is 1 3/4" OD x 0.118" wall round steel tubing. Minimum size for a roll cage is 1 5/8" OD x 0.118" mild steel or 1 5/8" x 0.083" chromoly.

If you have no plans to pass technical inspection at the drag strip and simply want to afford some protection for you and your passenger, then use any type materials you want to.

I urge you to purchase a NHRA Rulebook. You can get them from www.summitracing.com for $10.

Last edited by techinspector1; 01-11-2007 at 09:18 AM.
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