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      02-22-2020, 01:43 PM   #38
3002 tii
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Drives: Z4 M, 550i, X3
Join Date: Apr 2008
Location: CT

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Originally Posted by Michael9218 View Post
Not sure I agree with the notion that if the factory belts use the bulkhead than it should be good enough for aftermarket shoulder belts. The factory 3 point mounts at the outboard extreme of the bulkhead and the bulkhead is strengthened and braced in triangulation for a forward load. Inboard shoulder mounts will not benefit from this structural reinforcement. In fact, towards the center of the bulkhead you can see it is more flimsy. Use of spot welds in the center section. As I recall from removing this bitch, the outboard reinforced area had some stitch welds. Much stronger.

Also, roll hoops are designed for a different load path. Pushing down, not bracing a forward load.

Hopefully this picture helps illustrate:

Michael - saw your build thread, quite impressive. You probably know this chassis better than anyone else on the boards. In your opinion, do you think there's any suitable location on the bulkhead (or a way to reinforce it) so that it can serve as a proper anchor point via eye bolt (plus threaded insert and plate)..

I know my roadster won't ever see w2w action but I really miss the ability to use my HANS for DE/TT. With bucket seats the factory roll hoops would provide more than enough clearance (i.e. more concerned about frontal impact and in the unlikely chance that a rollover occurs in DE/TT, I believe the factory hoops will do their job). So if I could run a proper "ASM" 4 point harness by anchoring to the bulkhead, that would be ideal for me. However, I recognize the irony of going through this effort just to compromise on safety. And last thing I want is to experience what this dude went through.

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Last edited by 3002 tii; 02-22-2020 at 06:37 PM..
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