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      02-12-2020, 03:22 PM   #6
Obioban
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Drives: M3, M3, M5, M5
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Quote:
Originally Posted by TTGator View Post
From what I’ve read and common sense tells me, the only time a Roll Cage or Proper belts aren't better than none is when they are improperly used. If the cage is built right and you’re not going to hit your head on it because it’s correct and the harness is going to keep you from it, that setup even without a helmet is better than your stock car with stock belts in a bad crash.
In a crash, if you're short enough that you can position yourself such that you'll never have head to cage contact (which is only possible with a harness, not a 3 point), with a 5/6 point, yes.

Buuuuuut... you're more likely to get into a crash in the first place wearing a harness than a 3 point, as they severely limit your ability look around, position your head, etc. Additionally, running a cage means you lose the function of the head protection airbags that curtain the windows from your head. Not a big deal if you're wearing a helmet, but not amazing if you're not.

Also, the way Schroth's 4 point anti submarining harness functions is that one of the shoulder belts expands in a crash, allowing you to twist over the seat belt like you do with a 3 point, instead of sliding under the harness like you would in a normal 4 point without a sub strap. This stretch would likely also allow head to roll cage contract.

Also, related side note: If he's not running stock seats, why is he running a 4 point harness? The benefit of schroth's 4 point anti submarining harnesses is that they can be used with seats without a sub strap pass through hole. They function, but not as well as a proper 6 point. Since he's running seats with a sub strap pass through hole, why not get a sub strap? No compromise needed, now...
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2005 M3 Coupe, 2004 M3 Wagon, 2001 M5 Sedan, 2008 M5 6MT Sedan, 2012 128i M sport
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