Anyone running or have info on the Robison Racing Products under center birdcage set up ?


http://robisonracingproducts.com/

I'm still new to the sprint car game but we run XYZ cages that are the same design. I was told by a torsion bar dyno building company at the IMIS Show that what is gained by having the pickup point directly in line with the loading point of the bearing is lost in torsion arm twist/deflection due to the sharp angle and extended length. I would be curious if there were any advantage to this cage design if the torsion tube was moved further outward inorder to straighten the arms and help reduce twist

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Do you use aluminum rear torsion arms with your XYZ birdcages?

Yes they're the alum XYZ arms

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Ok just wondering.... Robisons setup as you can see includes tubular chromoly arms to reduce exactly what you guys were talking about, the arms twisting and flexing... I don't have any experience with these style cages/arms but have always wanted to try them... They make sense to me...

JMHO, but I really doubt there are few if any drivers, that can tell any difference, unless as in the old days, there were some extreme cases of where the arm met the cage, I've tried them all, I think, even made some myself, and if there was any difference, I couldn't tell it, nor anyone that drove my car, maybe, and I say maybe, on asphalt, where the side loads would be higher, maybe, but if everything is tight, I'd run what I had, or was used to, and worry about other things that make handling a big difference. Bob!