My cage is done! My cage is done!

My cage is done! My cage is done! - Printable Version

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My cage is done! My cage is done! - Graham - 11-24-2005

Pics to follow

<img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" /> !!!!!

Graham

My cage is done! My cage is done! - Graham - 11-24-2005

I am adding a second diagonal at the back but the harness bar at the bottam will stay.

Graham

My cage is done! My cage is done! - Dave - 11-24-2005

Amazing how much more room for a cage there is with the interior out...

Where will you be mounting the harnesses?

My cage is done! My cage is done! - Graham - 11-24-2005

on the bottom bar at the back (picture 2)

I have had to make many changes to the RS cage design that I wanted due to MSA regs and my height!

But I am still happy with the result

Graham

My cage is done! My cage is done! - Dave - 11-25-2005

Got it. Looks very nice!

My cage is done! My cage is done! - Graham - 11-25-2005

Thanks

Not as nice as a nice RS rep cage would have but at least it is MSA legal and FIA approved if I ever race abroad.

Another plus is that I will fit!

Thats why the roof cross bracing does not go from corner to corner.

Graham

My cage is done! My cage is done! - Eric_K - 11-25-2005

Looks great. Are you going to paint it all white?

My cage is done! My cage is done! - Graham - 11-26-2005

Eric,

Yes all white.

I'm getting there!

It takes ages this race car building.

He's also made it so that I can keep the side panels of the dash (well he should have done but we will have to wait and see!)

Graham

My cage is done! My cage is done! - Clem - 12-12-2005

Hi Graham - looks like a lot of protection!

As I am going through the cage thought process now, can I ask what kind of tubing you used?

Also curious to know where the harnesses attach to the horizontal?

Thanks,

Jim

My cage is done! My cage is done! - Graham - 12-13-2005

I'll find out

I pretty much left it in there hands

Graham

My cage is done! My cage is done! - Clem - 12-13-2005

Thanks - I am trying to weigh the differences between 1.75x.095 and 1.50x.120.

Wondering if there is also a (real) difference in the 1020 DOM vs 1026 DOM.

My cage is done! My cage is done! - flash - 12-13-2005

the 1.75 is a lot tougher to work with, with no real benfefits in strength in this application - most guys use the 1.50

My cage is done! My cage is done! - Clem - 12-13-2005

Thanks Flash. It's interesting, from what I've read the 1.75x.095 should be slightly lighter and stronger than the 1.50x.120.

But, I have heard that it is harder to work with.

I checked out Eric K's page and his is 1.75.

I would prefer to go with the larger diameter since it seems to be the spec promoted by several organizations (eg Grand Am) and the weight of the car plus driver and fuel will probably be over 3300 lbs. So, not light by any means.

I'm also curious to know how much extra space the 1.75 vs the 1.5 will take up in the car. I would think with a proper design the effect would be negligable?

on edit - Does anybody know the specs of a 996 or 997 cup or GT3R/S cage?

My cage is done! My cage is done! - Eric_K - 12-13-2005

Yes, my cage is 1.75x.095 DOM. The larger diameter is harder to bend (which is good for a cage). It is also slightly lighter.

1.5 x .120 = 1.768 lbs. per foot

1.75 x .95 = 1.679 lbs. per foot

I think either would be a good choice. The 1.5 can give you a little extra room but if the cage is tight to the chassis then it is not a big difference. I don't have any complaints with my cage.

A professional, experienced race car fab shop should have all the knowledge to advise you. My advise is to check around your area and find who racers use to do their cages. The cage is something you want to do right and do once.

Eric

My cage is done! My cage is done! - flash - 12-13-2005

the larger tube is slightly lighter, though you generally need more triangulating tubes with the larger tubing

the strength issues become rather moot once you try to bend attach anything, and are really only in linear deflection capacity, so not a real issue, which is why both tubes are specced

the increased bend radius, and more likely change from MIG to TIG welding, is what makes many guys go to the smaller tubing

both tubes are great and i wrestled with that decision myself recently

definitely take your time and consult cage builers who have done this car, and don't chintz - it's a lot more about the welder than the tubing

My cage is done! My cage is done! - Eric_K - 12-13-2005

FWIW, the shop I use tends to add more (not less) triangulation when using the smaller diameter tubing. For example:

But Flash is right, the quality of the work is more important than which spec of approved material is chosen.

Eric

My cage is done! My cage is done! - Clem - 12-13-2005

Thanks guys, this is helpful.

I am still in favor of the 1.75 - and Eric I do plan to make it as tight to the chassis as possible, so the quarter inch difference is a very small penalty.

My cage is done! My cage is done! - flash - 12-13-2005

what it looks like there inthat shot, is they used smaller tubing to make the triangulation - that is pretty common - from the builders i've used, they don't need as many triangulation tubes at all if they use the smaller and thicker tubing

a lot of it is getting past the steward - they see more tubes, they bless it easier

one thing for sure - since most guys insist on TIG on .095 wall tubing, the welds are sure prettier

My cage is done! My cage is done! - Eric_K - 12-13-2005

That is a 1.5 cage, with even smaller tubing used for the gusset.

My cage is done! My cage is done! - flash - 12-13-2005

wow - i assumed the larger tubes were over 1.5 - that wouldn't have passed out here, at least not in SCCA - nothing smaller than 1.5 @.120 for anything

we've recently seen a few people get killed out here, and they are consequently a bit nuts about cages and bars