Subframe connectors

dgc333 said

Is .125" thick tubing really necessary? No other chassis metal is that thick, just seems to like a lot of extra weight that will add little torsional stiffness. Also, why 2x3 if you aren't going to have the 3" dimension vertical?

I am planning connectors for my Barracuda shortly and I was going to uses 2x2 tubing with a whatever is availblke in the .060" thick range.

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Dave,
I tend to believe you that the .125 is too thick, especially when you look at it. However, the other piece of this puzzle is the roll bar/cage. Most racing classes required wall thicknesses for mild steel to be .120 depending on the diameter and weight of the vehicle. If you are going to tie your cage into the subframe connectors, they might as well be as thick as the cage tubing. The extra weight isn't too much of a concern because it's located so low in the car. The added stiffness, and resulting better launch, should offset any weight penalty.

Ken