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Making a Cross Brace.

 
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Old 10-03-2011, 08:13 PM
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Making a Cross Brace.

I've been planning out the brace for the last few days. What do you guys think about my idea? I've been trying to figure out what material to make it from. I was planning to make it from mild steel, just because it's relatively available in my mind.

I'm going to see if I can modify the rear seats so that I can keep them in.

The green lines would be a mild setup
The blue lines are a second design, just add that to the green lines.

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Old 10-03-2011, 08:40 PM
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Re: Making a Cross Brace.

if you want my opinion i would say go for the second design with all the lines in the picture. that would deffinately stiffen up the chassis alot. also, mabe add more reinforcement on the top and bottom of the "x" in the center.
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Old 10-03-2011, 09:18 PM
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Re: Making a Cross Brace.

i agree with preludekid if your going to go for it do all of it. no need to do it half ass.
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Old 10-03-2011, 09:25 PM
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Re: Making a Cross Brace.

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Originally Posted by preludekid516 View Post
if you want my opinion i would say go for the second design with all the lines in the picture. that would deffinately stiffen up the chassis alot. also, mabe add more reinforcement on the top and bottom of the "x" in the center.
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Originally Posted by Fliperflop View Post
i agree with preludekid if your going to go for it do all of it. no need to do it half ass.
Yeah I was leaning towards the cross brace a lot more than the triangulated c pillar bar. There isn't a company I know of that makes anything like this for the 3rd gen so I decided to make one since I'm in the metalshop every day at school. I'm mig welding this.

I'm not sure on the size of tubing I'm going to use, the base plates are going to be made from 1/8th inch steel. I'll be making those first.
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Old 10-04-2011, 08:22 AM
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Re: Making a Cross Brace.

you know how to weld correct? MIG/TIG?

bracing is all about triangulating. the first design, the Z, is basically like a 3-bar linkage and can still flex/move. which is why second design >> first.

either mild or low carbon steel would be nice and stiff, and good weldability. i would say something with a wall thickness of either 0.08 or 0.12" would give a considerable amount of stiffness, while still not weighing a ton. if i were still in school and had access to ANSYS i could do the stress analysis of them, booo
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Old 10-04-2011, 09:09 AM
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Re: Making a Cross Brace.

i say go all out. only thing is were you are attaching it to the car have you looked under/behind it. are you welding to cosmetic sheat metal or directly to the chassi? dont want your car pulling itself apart.
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Old 10-04-2011, 09:40 AM
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Re: Making a Cross Brace.

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Originally Posted by twokexlv6coupe View Post
you know how to weld correct? MIG/TIG?

bracing is all about triangulating. the first design, the Z, is basically like a 3-bar linkage and can still flex/move. which is why second design >> first.

either mild or low carbon steel would be nice and stiff, and good weldability. i would say something with a wall thickness of either 0.08 or 0.12" would give a considerable amount of stiffness, while still not weighing a ton. if i were still in school and had access to ANSYS i could do the stress analysis of them, booo
I haven't learned tig, I can do oxy-acetyline and mig. I've been welding for two years. I'm in school right now, it's possible that the drafting classes have that program, but who knows.

I'll take a look at the .12" it would be nice to weld on the thicker metal haha I'm too lazy to do thin metal, it's too time consuming lol.

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Originally Posted by conor07 View Post
i say go all out. only thing is were you are attaching it to the car have you looked under/behind it. are you welding to cosmetic sheat metal or directly to the chassi? dont want your car pulling itself apart.
I'm going to do the full cross brace. As far as I know is it's being attached to the chassis itself, it's going to be bolted, not welded, just to save me a pain.

I'll make sure to control the heat as much as possible.
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