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Originally Posted by CarlC
Something else to consider is that the systems you are considering have the potential to cause you to submarine under the lap belt during a crash. The shoulder harnessses can pull the lap belt up when under tension.
A good retractable 3-point like the Morris Classic Concept is the best bet since it mimics the OE-style pass-through buckle that creates tension in the lap belt during a crash. When going beyond that, to a 5 or 6-point setup, a submarine belt is needed and installed per the manufacturers specifications.
Yeah, I know, it's a pain. I just finished reworking mine since the sub belt was not correct. Think Schroth 6-point mounted in the Formula arrangement. I'll post up info in the Honor Flight thread soon.
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Carl - Thanks for your input.
These are the "casual" belts I was considering:
https://www.seatbeltplanet.com/seatb...n-retractable/
I made these mounts for the shoulder belt to bolt in to:
Is going with the non-retracting style a mistake? My thought was I could snug them up when desired and reaching inward or to the glove box should still be an option.
Regarding submarining, the Schroth ASM system made sense though I have no first hand experience or desire to test.
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ASM stands for Anti-SubMarining. It's an extra flap of material sewn into the inboard shoulder belt that prevents you from sliding underneath the lap belt. In a 4 point harness made by some other company, the two shoulder straps restrain your upper body equally. They keep your chest from moving forward. However, this also pulls up on the lap belt and allows your accellerating pelvis to slide under the lap belt and cause serious damage to your stomach and intestines. With ASM, one of the shoulder belts will elongate at a different rate which will force your pelvis down into the seat cushion. Upon rebound, you will be placed back in an upright position with the belt correctly placed over your body.
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