Harness mount - is this right?

[mmasse]

I had my cage, driver seat and harness installed by a reputed racing shop in Long Island NY. They installed the inside part of the harness with an eye bolt to the wall of the tunnel, instead of installing it to the floor. There is only a regular washer on the inside of the tunnel, since the eye bolt is close to the floor so it won't allow for a backing plate/washer.
I am ready to install the passenger side seat and harness and wanted to make sure that this mounting point is appropriate. The outside mounting point is on the factory seat belt mounting with an eye bolt

[Jeff Alton]

Not sure what we are looking at in the photo....

Your lap belts can be mounted with eye bolts threaded into the factory seat belt mounts. Your shoulder harness should be wrapped around your cage directly behind your seat to minimize stretch. Your sub belts can be mounted to to eye bolts threaded through the floor under the seat to BIG backing plates or to a custom fabbed or readily available sub mount bar.

[GaryR]

The lap mounting points are both where the original seat belts were mounted, I assume that is what is under your rug? If so that is correct. For mounting the anti-sub straps for your 5-6 point you need to drill holes and use backing plates under the car and shoulder belts attach to the harness or harness bar with the angles set properly according to the mfg.

[mmasse]

the picture is looking at the tunnel.
No, the eyebolt is not on the factory mounting point. They drilled a new hole on the wall of the tunnel and installed the eyebolt there with a regular washer and a nut on the inside of the tunnel.

I will try to installed it on the stock mount. thanks

[Bill Verburg]

the tunnel lap mount is usually a reinforced eye bolt throught the tunnel wall on a 964 up car, the tunnel walls are immensely strong
here is where the later cars have harness mounts


on an earlier car it's probably a good place for the mount too, it least as good as throught the floor anyway

[GaryR]

On my SC's I simply unbolted the sealt belt mounts and screwed in the eye bolts from the kit, no need to drill anything for the lap bolts. I'm surprised that all 911's at least through the 90's didn't have the same mounting points?

[orcadigital]

Originally Posted by Jeff Alton

Not sure what we are looking at in the photo....

Your lap belts can be mounted with eye bolts threaded into the factory seat belt mounts. Your shoulder harness should be wrapped around your cage directly behind your seat to minimize stretch. Your sub belts can be mounted to to eye bolts threaded through the floor under the seat to BIG backing plates or to a custom fabbed or readily available sub mount bar.

PCA Specifically does not allow using the harness bar as a mounting point for shoulder belts. The bar is meant to maintain a proper angle, and in many cases is not structurally built to be a mounting point. Thus instead of trying to craft some kind of test for structure, it's easier to require mounting the belts to the chassis.

[GaryR]

Originally Posted by orcadigital

PCA Specifically does not allow using the harness bar as a mounting point for shoulder belts. The bar is meant to maintain a proper angle, and in many cases is not structurally built to be a mounting point. Thus instead of trying to craft some kind of test for structure, it's easier to require mounting the belts to the chassis.

Jeff said to use the cage. In no case is it good to have a 3' belt run behind the seat as it WILL stretch quite a bit under a high G load and the driver has the possibility of slipping out.