5 point harness install tips

[Digitalwave]

I would not recommend attaching them to the seat mount. You can safely attach the eyebolts with threaded backing plates. Schroth sells them.

https://www.schrothracing.com/products/reinforcement-plates#1612

There are very specific instructions on how to position and orient the eyebolts. Make sure to follow them. In my opinion, the stock seat seatbelt bar hole does not provide the proper angle for the lap belts (far too shallow). Not to mention the clips are going to have to wrap around your bracket, and will interfere with the bracket and possibly the seat as well. Here's an example of where mine are attached, it's well back of the stock bolt holes for the proper angle per Schroth's instructions (mine are on welded-on reinforcement plates): link

[haaken675]

Yeah mine are threaded into the seat holes, don't know thread pitch off the top of my head. I drilled holes and used backing plates for the crotch belt

Awesome, looks like I'm making another run to hardware store today! They are m10 bolt holes, I just double checked with some brand new bolts I purchased yesterday.

[Jb325is]

Yeah mine are threaded into the seat holes, don't know thread pitch off the top of my head. I drilled holes and used backing plates for the crotch belt

[haaken675]

That's partly why I was considering getting a new eye bolt that would thread into the stock seat rail holes. This part of the body seems to be reinforced rather then my drilling a hole and using backing plates. I think this would keep the recommended angles in place.

And no, no instructions provided. That being said, I just looked up some of the major sanctioning body rules as well as the schroth instructions.

[agent]

The harnesses should have come with instructions on where to put the mount points. If not (yikes), Schroth has information published on their site.

https://www.schroth.com/en/segments/racing/service/technology-tech-tip.html

Think about it this way: If the seat mount gets broken/dislodged in a crash, do you want your belts mounted to it?

[haaken675]

Hey everyone. I am finally getting my interior put back together on my car and want to make sure I install my harnesses in the most efficient and safe manor possible. I have a custom built 4 point roll bar, so no worries on putting harnesses into a car with no rollover protection. What I am curious about is what the best way to mount the eye bolts for the harnesses. I purchased cipher auto harnesses, and they came with what appear to be 7/16 eye bolts, so clearly not going to thread into anything preexisting in the chassis.

So a couple of thoughts. I could potentially find a graded set of eye bolts that fit in the rear seat bracket spot:


Or, I could drill holes and mount the eye bolts for the hip straps to the rail itself. I of course will have to drill a hole for the submarine strap regardless of how I do this.

Or, should I just bite the bullet and drill new holes in the chassis for the eye bolts and keep them off the frame rail?