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5 point seat belt

Old 02-10-10, 11:32 PM
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5 point seat belt

I got my rx7 with a rollbar and a 5 point seatbelt harness and is there certain way the belt has to be bolted on the rollbar? as you can see in the pics, you see the type of harness and the type of rollbar
Attached Thumbnails 5 point seat belt-p1000357.jpg   5 point seat belt-p1000354.jpg  
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Old 02-11-10, 07:55 AM
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That seat isn't set up for 5 point. The shoulder harness will wrap around the horizontal bar. Read through the below, you will learn a lot about proper installation:

http://www.schrothracing.com/sdocs/2...structions.pdf
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Old 02-11-10, 08:37 AM
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It is prefered to wrap the belts around the harness bar, rather than bolt them to it. I have no idea why someone would do it as shown in the picture.
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Old 02-11-10, 11:17 AM
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i read the link SCCAITS put on and seems like it is set up correctly... if anybody knows how it's set up wrong just say so
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Old 02-11-10, 11:24 AM
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Curious, Can you setup a harness with racing seats with NO roll bar at all? Or is the only way to attach the belts is at the bar?
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Old 02-11-10, 12:51 PM
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Originally Posted by SCCAITS View Post
That seat isn't set up for 5 point. The shoulder harness will wrap around the horizontal bar. Read through the below, you will learn a lot about proper installation:

http://www.schrothracing.com/sdocs/2...structions.pdf
That seat looks like the bottom cushions velcro on and off, there is probably a hole in the bottom you can get to for the sub belt, and then it comes out between the cushions. Lots of sparco seats are set up that way, and that seat looks just like a sparco evo.
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Old 02-11-10, 01:15 PM
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Originally Posted by BonesZ33 View Post
Curious, Can you setup a harness with racing seats with NO roll bar at all? Or is the only way to attach the belts is at the bar?
Thats the only proper way. A lot of people hook them up to rear strut bars or bolt them to the floor and that is wrong because dude to an impact the mounting point of the harness will affect what forces are applied to your body. They are supposed to level with your shoulders, directly behind you.
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Old 02-11-10, 01:31 PM
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Originally Posted by BonesZ33 View Post
Curious, Can you setup a harness with racing seats with NO roll bar at all? Or is the only way to attach the belts is at the bar?
Yes you can. As mentioned, there are options such as using harness/strut tower bars. However, the problem without using a rollbar or cage, your head will most likely be the highest point inside the car. In the case of a rollover, the harness will not provide slack for you to bend like a standard seat belt. This can cause the roof to cave in your on head causing spinal injury (or worse).

While this is an extreme situation, it is a real scenario which can happen. The best idea is not to use a harness without a rollbar or rollcage.
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Old 02-11-10, 06:08 PM
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Disclaimer, I can't see those pics very well, it's hard to see how the bolts are installed in the shoulder harness mounts

That said, I've never seen a harness manufacturer claim that the only way the harnesses should be mounted is a wrap around the horizontal bar. My car the shoulder harnesses were mounted using bolts.

Here's how mine looked before I sold it:

Seat looks fine, as long as the 5 point belt comes up through the bottom of the seat, not wrapped around the front of it. hard to tell from that pic where the 5th point is.

PaulC
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Old 02-11-10, 07:30 PM
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Silkworm I don't know about that design... in a crash the seat back brace will be applying leverage to the end of those nice long bolts...

I don't know why people do anything other than wrap around the bar. All you're doing is adding more complication and more potential sources of failure.

Also always make sure to double-back through your three bar adjusters. (I don't see it anywhere here but it's always good to remind people) I don't know how many cars I see with it wrong when I go to the track but it's a lot. I always point it out to people when I see it.
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