if they are a reasonable price matty ill pick some up.

 

This is very interesting, thanks for the info, Matt. I'm probably going to go with custom SFCs this summer but depending on whether Dan keeps making these and comes out with stage 2 and 3, I may consider these. I think doing it myself (with much help from an experienced friend with a MIG welder) will be cheaper and result in a stronger chassis.

 

I don't have the time to build the products I have listed already, let alone SFCs and other goodies like that!!

..... and if I were to get into major chassis bracing situations, they'd do a helluvalot more than just weld UNDER the car.

 

You and your big job , forgetting about us in the process

Is there anything i can do to help? I still remember what you told me about the SFC's back when you worked on my suspension. I'm with Josh on this, this time around though

 

Yet another FYI

Yes, I was the one who flew to California many years ago and was instructed by a custom race shop on how to make SFCs on FWD cars. Their design was with round tubing that needed to be bent and then have tabs welded on. They were able to quickly bend these up, while the customer was waiting. This method works but we looked into it further after our testing round DOM tubing vs. rectangular tubing. We found that rectangular design was superior and flexed much less due to increased surface area.
Here is the real scoop. According to ASTM standards (American Society for Testing Metals) the material we are using, 1" X 2" rectangular, 11 gauge, A513 has a very good tensile rating of over 50,000 lbs per square inch. Our design with 1 X 2 tubing has far less flex than round 1 1/4 tubing. Rectangular tubing has more area than round tubing. The material test report is available to view if desired. We then verified this with a welding and fabricating consultant who verified that the rectangular tubing is superior for this application.
Another advantage of rectangular tubing is the ability to tuck up tight against the car for mounting. We paid particular attention to make sure we could reduce flex as much as possible by making sure the tabs were welded right at the seams, and with our tubular design, it is possible to stitch weld down the entire rail for added support if desired.
If these are like a noodle glued to the frame, the standard for the steel industry must be wrong. We don't claim to be the biggest and most knowledgeable engineers out there. However we do stand behind our product. From now on just the fact please, not speculation.

Truax Motorsports

 

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Get out of my bubble!

 

Dan, thanks very much for the detailed material and design info. The rectangular tubing would have more surface area and more steel per inch but also more weight per inch. I think it's well worth the tradeoff, for the reasons you mentioned (added strength, better fit, and ability to seam weld). Do you know the weight of the complete kit, to end our speculation?

Anything you'd care to say about your design of the cross-bracing?