03-23-2013, 07:06 PM
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CC Member
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Join Date: May 2009
Location: American Fork,
Ut
Cobra Make, Engine: 66 Cobra
Posts: 930
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Not Ranked
X Brace
DanielG, I think you have a valid point. I had a similar situation, at one point I started thinking about frame flex as I have an expensive aluminum radiator that was designed to be hard mounted to some welded on ears on the frame. I was concerned with eventually cracking the radiator so I did some testing. When I jacked up one front A arm the frame flexed more that .025 until the other front wheel came off the ground. My car has a K member and I found that the maufacturer just went from 4x3 to 4X2 steel for the K member. At the suggestion of an engineer friend that builds cars I decided to add an X brace to the K member. I made it out of 1 1/4" .120 wall DOM tubing and it took a couple of days.
After it was all in I did the same test again and the frame did not move at all. In fact when I jacked up the one side all the way the other side stayed on the ground and the whole side with rear end lifted off the ground.
I have seen a lot of frames that if I was building the car I would have X braced the frame between the seat area and X braced the K member.
This was how I did mine. One of the best decisions I made with building my car.
__________________
Wayne
"Everything is alive. If you get angry at a vehicle or the trans, it won't fix until you apologize and say you are sorry." "The vehicle always knows what it is doing and what the cause of it's bad feeling is. If you ask it humbly what the problem is, it will tell you. Then you and it will both be happy."
Gil Younger
Last edited by Wbulk; 03-23-2013 at 07:13 PM..
Reason: spelling
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