ADR compliant 4 point?Hi, the newest technology (at time of marketing) in seat belts mentioned here is 40 years old (pyrotechnic tensioners MB 1981).
I have cars without belts, with lap belts, with 3 point fixed, with 3 point retractable, with 3 point retractable and pre-tensioners and one car with ADR approved 4 point harnesses: ie 2" webbing and regular style seat belt buckle. I only fitted harnesses as they were the most suitable system to work with the seats I have in that car.
Anything other than a regular 3 point belt (whether fixed or retractable) are normally used in conjunction with other safety features.
A properly fitting harness will do an admirable job of holding your body in place in a high speed head on crash, but what happens to your head and neck, hence (high speed) race cars also have some form of head and neck restraint fitted.
3 point belts although not perfect, allow the body to fold somewhat to lessen the forces exerted on the head and neck during impact. Pre-tensioners are almost always used in conjunction with airbags.
Modern road cars don't have harnesses for the same reason modern race cars don't have air bags, they don't need them.
My D Special came with retractable belts, don't ask me what they are, they're black and they pull out and reel back in, I'm happy.
It's your car, whack some retractables in it, if you're really worried about how much more they might stretch than a fixed 3 point belt in a crash, drive a bit slower or lose some weight.
About 5 years ago I wanted to fit 4 point in my raid car, because the pillar was not suitable for lap/sash.
My certifying engineer said, unfortunately there is no provision in the ADR for 4 point restraints in road cars.
Do you know it definitely complies with ADR, or is it someone's claim that does not come with documentary evidence?