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      03-24-2015, 09:17 PM   #11
afadeev's Avatar

Drives: F80 M3
Join Date: Jan 2012
Location: NYC

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Originally Posted by ///Mobbin View Post
Originally Posted by volkl23
Since there's an integrated headrest, does that mean there won't be an easy solution for a harness system that doesn't rely on a rollcage (Quickfits) as there's no proper way to have the harness pass through?
I've researched this many times and I always come to the same conclusion. If you are going to harness yourself upright, you really need to have at least a half roll-cage, 5 or 6 point harnesses, one-piece seats, and a hans device.

Think about this, in a rollover scenario where the roof crumples, would you want to be harnessed in the upright position? If you stick with oem seatbelts, your body will at least have room to fall forward in this unfortunate event.
The above is a popular well-articulated, conservative approach.
I have a different tack with HMS's Schroth ASM quick-connect belts for 3 reasons:
1). ASM allows degree of sideways movement in an emergency
2). I care about getting my but well connected to the car so that I can fell what it's doing, and be better positioned to prevent emergencies before they happen. To me, it's a trade-off between pro-active preventative safety, and passive safety.
3). I'm getting older, and am putting additional value on comfort and avoiding needless exhaustion. Being properly (and I would argue safely) tied to my OEM seat keeps my upper body from getting a heavy workout during a DE/autoX weekend. That, in turn, allows my head and my reflexes to keep working better towards the end of the session. Occasionally, I test drive other cars, and bracing yourself with arms and legs when only supported by a 3-point OEM belt is pretty tiring and distracting !

I would not impose the above approach onto others, but it has worked for me for the past 20 years with the following belt system:

Originally Posted by ///Mobbin View Post
There is something to be said about not having to brace yourself around every turn but I don't think harnessing yourself in without proper safety equipment is the right answer. You might consider installing a seat that holds your body in place better and works with the OEM seatbelt, not sure what a good option might be there though.
See above.

'19 TM3P (BK/BK)
'15 F80 M3 (SO/SS)
ex-'17 I01 i3-BEV (PB/DD), ex-'15 I01 i3-REX, ex-E90, E46, E36's, E30's