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Join Date: Dec 2005
Location: In a race car somewhere...
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pictures of welded in roll cages needed

hi all, i am in the process of building a weld in cage for a 944 NA racecar...i am wondering if anyone has pictures of cages that they could post so that i can see some of the construction techniques and bend angles....i did a search under "roll cages" and didn't turn up any pictures...any replies would be appreciated!! Thanks!
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brant giere
2005 996 cup
1991 964 euro cup (Larbre #28- race
1987 carrera 3.2-street/de car
1962 Austin Healey 3000

Last edited by oliver88; 12-29-2005 at 03:17 PM..
Old 12-29-2005, 03:12 PM
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Here's my cage:

http://home.earthlink.net/~geo31/Geo's_944_Cage.html

Teaser pic....

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George Roffe

Last edited by Geo31; 12-29-2005 at 09:06 PM..
Old 12-29-2005, 06:45 PM
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1) Are you building for a specific class or just for a DE car?

2) What size tubing are you using?

3) What bender are you using?

4) What notcher are you using?
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Old 12-29-2005, 06:50 PM
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Old 12-29-2005, 07:52 PM
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the forum ate the link. try this one:
http://home.earthlink.net/~geo31/Geo's_944_Cage.html
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1983 944 - Sable Brown Metallic / Saratoga / LSD : IceShark Light Kit

Last edited by bryanthompson; 12-29-2005 at 07:56 PM..
Old 12-29-2005, 07:53 PM
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Mine isn't as nice as Geo's - not a custom fit, just the off-the-shelf OG Racing cage with a couple of extras. It's installed in a car without interior, yet is designed for a car with an interior, so there's more space than I'd like. Yet it does have the right attachment points.
There's a few pics at my webpage, though not excellent for showing the cage:
http://vaughanscott.com/construction.htm#INTERIOR
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Old 12-30-2005, 08:16 AM
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http://www.tcdesignfab.com/944rollcages.htm
Old 12-30-2005, 08:54 AM
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Thanks for all the replies! Geo31, i am building a race car for NASA and PCA...currently researching tubing size requirements for both...will be seamless DOM...bender and notcher are owned by the fab shop and i am not sure of the make or brand yet. any other input would be appreciated and valuable!
Thanks!!
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brant giere
2005 996 cup
1991 964 euro cup (Larbre #28- race
1987 carrera 3.2-street/de car
1962 Austin Healey 3000
Old 12-30-2005, 09:16 AM
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Not in the Porsche, but here's one I helped on if it gives you any ideas:

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'84 944 moneysucker edition (SFR, Corbeaus, etc.)
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Old 12-30-2005, 11:56 AM
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All of the tubing size requirements are listed in the online NASA and SCCA rulebooks. The rules should say 1.5" dia .120 wall or 1.75" dia .095 wall for the typical stripped 944 track car weight but check them out for yourself to be sure!
Old 12-30-2005, 06:23 PM
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Quote:
Originally posted by oliver88
Thanks for all the replies! Geo31, i am building a race car for NASA and PCA...currently researching tubing size requirements for both...will be seamless DOM...bender and notcher are owned by the fab shop and i am not sure of the make or brand yet. any other input would be appreciated and valuable!
Thanks!!
First of all, KNOW YOUR RULE BOOK!

The rule book is your friend (despite how some feel about it). It will tell you the tubing size(s) allowed.

Cages are relatively simple things, but most people get WAY too clever with them and execute them very poorly.

1) Where tubes are welded to other tubes they should whenever possible come to a single point or node.

2) If you have a choice between NASCAR bars and and X, consider carefully. The NASCAR bars derive their strength from mass. However, mass for mass, the X brace (in a single plane) is actually stronger.

3) Well designed cages should not only protect the occupants, but should also strengthen and stiffen the chassis. Wherever possible the cage should tie into suspension mounting points (check your rules).

4) About 75% of the cages I see suck either from poor execution (way too common) or worse, poor design which is also too common. As I said, too many cages suck because people get too clever for their own good.

5) Tubes should have as few bends as possible. Bends introduce weakness.

6) Support tubes should as much as possible tie into bends to help triangulation.

There's more, but if you follow these basics you will be 90% of the way there.
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Old 12-30-2005, 07:16 PM
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thanks George! i appreciate the input.
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brant giere
2005 996 cup
1991 964 euro cup (Larbre #28- race
1987 carrera 3.2-street/de car
1962 Austin Healey 3000
Old 12-31-2005, 12:31 PM
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