Porsche Post Harness Article

[Steve Brookes]

Just read your article in PP Alex. What's the update on the harness? You were still waiting to finish the fitting when the article went to print.

Interesting that it sounds like you are attaching to the bar and not using it as a guide (attaching at the rear seat belt mounts).

And tell us more about the submarine effect. Would that also happen with normal 3 point belts?

Nb. Although questions are related to Alex's article, others please feel free to chime in []

I'm particularly interested in the harness subjecte since installing these seats [8D]

 

[964RS]

Hi Steve,

Those seats look brilliant! See all the slots - crying out for 6 point harnesses to make them complete! []

 

[Steve Brookes]

ORIGINAL: 964RS

Hi Steve,

Those seats look brilliant! See all the slots - crying out for 6 point harnesses to make them complete! []

Sitting in yours mate helped me make the final decision that PPs were the way to go. []

 

[Alexander_Drobik]

Hi Steve, yes I got it all working. I used a harness truss - brey krause - not the guide bar. The truss is designed to link to the harness directly. It worked fine. The truss is in different versions. The one I had was for a 911 up to the 996. There are other truss models - not sure which - the brey krause web site will have them. As I did not want a full cage it was the next best thing. The harness links to the truss directly, with the lower right of the harness to the body and the lower left of the harness to the seat - allows me to move it. I could add the two lower ones (of a 6) if I had the right seats. The truss makes no difference here.

As I have reclining seats without the lower slots for the 6 piece, I wanted something that helps in the anti-sub bit. The sub bit is where the lower lap belt slides up, or you down, and crushes not your hips but your softer tummy/vitals. The 6 piece hold the lap part in place, without that, the belt can move. Schroth claims their anti-sub harness solves this - although probably not to the same level. They have built an extra, inch or so, of loop on the left strap (rhd version). In a crash, the stitching breaks, lengthens the belt and throws your body in towards the middle of the car by an inch or so. They reckon that energy/movement stops you going under the lap part. I can't test that part without crashing!, so will take their word for it. If I were racing the car it would be a fixed seat, full roll cage and points set on the body not the seat.

As I wanted a road car for some track sessions I think what I have is safer then the normal seat-belt. It also holds you in the car/seat far better. What percentage is my arrangement Vs a fixed seat/roll-cage - pass - maybe 60%??? No real idea - but better than just seat belts! In my old arrangement if the seat bolts broke I would have nothing to hold me. Also, as a 3-point in a crash, half the body could swing out.

Anyway - that is the idea!

Hope this helps!

 

[Steve Brookes]

Thanks Alex. I've looked up the Brey-Krause website and now realise what you mean by the truss bar. Even though my seats are designed for full race harnesses, I like the idea of just one set of, road legal, 4 point harnesses that offer support on the track and are convenient for the road. Hence my interest in the article.