3 replies to this topic

[matt.roffey]

Hi guys, quick question about fitting 4 point harnesses

Can you put the eye bolts through the existing seat belt mounting points, either side of the seat and on the back seat?

Or do I need a harness bar really?

Is for a weekend car and would only be drivers side as then I'd use standard passenger side and behind the passenger as then I can get me + 2 others in

Thanks

Matt

[rikSTAR]

I have the eyes bolted in the normal seat belt holes, as for the rear, companies like mini sport and mini spares, do little plates with nuts welded on them so you can use the rear seat belt holes too

[Gremlin]

Make a harness bar, easy. Not welded up yet

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[zerobelow]

4 point harnesses are often not nearly as safe as a 5/6point or even a 3 piece standard seat belt. Most hold your torso upright, but don't prevent "submarining" in which you slide out the bottom of the lap part a bit, and end up with a broken back. Some 4 point belts have one of the shoulder straps designed to stretch/break, allowing you to fold over a bit, helping prevent the submarining. As for mounting, you want a harness bar, and you want your seat back firmly attached to the harness bar. The shoulder parts of the harness should be parallel to the ground from the, and should go straight back at or just above the shoulder level. If your harness bar is too low, then in an accident, the seat belt will provide compressive load on your spine, pulling down, leading to a broken back.