Roll bar question.

[BRAINIAC]

Yeah, just one bolt. But it's a pretty big bolt. Plus it is bolted to a seatbelt anchor point which is certainly stronger than the thin sheetmetal of the floorboard. I'm more concerned about that than I am the seatbelt anchorpoint.

The DAS bar uses this same anchorpoint, so I'm sure it's OK. It feels *very* solid.

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Tyson Schmidt
72 911 Cabriolet
92 C-2 Cabriolet

[Clark Griswald]

Brainiac,

I'd be concerned about the lowered tie in points for the angled braces. You have given up a great deal of strength in that top loop.

Note how high they mount on Mikez's car. They deliver triangulation to the top of the hoop and are very rigid. I can't even see yours. Mounted that low, they will help anchor the bar but don't do much to prevent the main hoop from bending in a roll over.

I would be surprised if that meets the requirements of PCA, SCCA, etc.

[Joe Bob]

Yep, I agree with Clark....hate to beat this to death, but the construction of the roll bars have been tested by many sanctioning bodies. It includes looking at failures after a car has rolled.

Mods to mount points would tend to weaken the roll over protection. As a matter of fact, SCCA and PCA have specifications as to where the mount points should be. Probably OK for street use, but if you ever tried to enter a sanctioned event my guess you would have a problem passing tech inspection.

As to my bar being mounted to thin walled sheet metal...well the mount plate is 4x6 inches and then a duplicate mount is sandwiched underneath.

I talked to a metalurgist and he calculated that the car would have to be dropped from a height of 20 feet upside down for the mounts to punch through the pan with the sandwich plate(s) spreading the stress...

Just an observation....on the other hand, you don't have any obstructions in the rear view mirror...