Ok, I'm going to be installing a 6 point 4130 roll bar in my Z-28 over the next few weeks. The car is my daily driver and I do have an 11 year old step daughter who rides in the car sometimes, so I was a little concerned about the cross bar. Through some research I found this joit to make it removable. I know that a removable bar is not NHRA legal, but a few guys I've spoken to have gotten past tech with this. It seems much stronger than the traditional method of making a bar removable as these are machined out of solid 4130 and are held with 2 3/8" hardened bolts. These are used in off-road racing all the time, so I don't see them a s being a weak point. That joint should be stronger than the bars around it! Tell me what you think.
__________________ 2001 Z-28....Gone, but not forgotten!
I've used these on rock crawler chassis builds for non-primary loaded tubes and only near the node (like you have it)... It's about the best you get for a removable joint... Quite strong compression and tension, but only as strong as the bolt or threads in shear... Which is good because the crossbar is there to keep the b-hoop from deforming under tension and/or compression. I can't really tell, but I'd recomend a plug weld where the slug slides inside the tube.