[craigawoodman]

Cloud,



The 5th leg of my harness uses a Eye-bolt (same as the rears) with an aftermarket captive nut and backing plate that you simply put under the floor after you have drilled a hole to spread the load across the floor metal. These nut/plate assemblies should be available at any racing shop. The metal backing bar is about 2" by 1" in size, all galvanised.



The two side belts are mounted off the seat belt anchor points with the flat plates that come with the harness, using the OEM bolts. My harness has latch type mounts that clip either through the eye bolt or the flat mounting plate (effectively a large triangle with a hole for the seat belt bolt and another hole for the harness to clip to.



I don't have a cage, so the top belts are anchored off the rear seat belt anchor points and over a harness bar. You can also use the child seat points in the rear.

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[Eric_Oz_S2]

Cloud

Here are a couple of photos of mine. Inboard harness connection, seatbelt bracket to slider/brackets and sub mount for 6 point harness.





http://i1304.photobucket.com/albums/s522...2ce26b.jpg



http://i1304.photobucket.com/albums/s522...d721cb.jpg

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[Cloud9...68]

Craig, Eric,



Thanks, this is very helpful. Looks pretty straightforward (although I'll believe that when I see it, as NOTHING has been simple in this build so far!).



In my case, I don't have a seat belt anchor point for the inner side mount, so it looks like I'll have to drill a hole in the tunnel as Eric has done. Isn't the torque tube seriously in the way when you do this, though? I guess I'll see when I get under there...

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[flash]

you should have plenty of room in there, though access is going to suck

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[Cloud9...68]

Yes, there have been many times I wish I could shrink myself down to about 6" when working on this car. Not as bad as our BMW X5, though. The V8 is crammed incredibly tight in that engine compartment, making what should be simple jobs a major PITA. I wouldn't wish the valve cover gasket replacement on that vehicle on my worst enemy!

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[Cloud9...68]

Where should the sub strap (I have a 5-point harness, with a single sub strap) be located on the floor relative to the front edge of the seat (if that's the correct reference point)? I've heard of people putting the mounting point well underneath the seat, and others several inches in front of the seat, and the instructions that came with my harness don't specify. What do you guys recommend? Thanks.

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[flash]

you want to place that so that under maximum seat compression, the angle of the belt is at least 90 degrees relative to the floor, and not be forward of the compressed front edge of the seat. you can have it reach farther under the seat, but you want to pay attention to keeping the belt as short as possible.



   

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[Cloud9...68]

Thanks, that helps a lot.

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[flash]

basically the idea is for the belt to crush your nuts as you move forward into it but not let you slip underneath it

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[craigawoodman]

Cloud,



Your seat should have a hole in the base that will allow the fifth leg of the harness to pass through and be vertical. You would mount the fifth leg directly under this hole with the seat in its normal position for you, so it passes up through the hole and into the clasp, not over the front of the seat. The aim should be to ensure that the clasp.buckle does not ride up, and sits properly, plus the fifth leg, will pull the leg belts down and stop y submarining out of the seat in a big forward collision (you two veg, and tackle might be a bit worse for wear, but better than broken knees and pelvis).



Does your seat have the hole in the seat base. Same for the side belts, there should be openings for these to pass through, but it will be the connector to the car that goes through, not the clasp, etc as it will not fit.

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[flash]

yeah - there was no way to show that easily, and i didn't assume he had the hole.



however, you still need to factor in any crush of the seat, which may put the mounting point a bit farther back than if you just ran it straight down through the hole

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[Eric_Oz_S2]

Cloud



I have found the schroth web has the best instructions.



It is important that the downward angle of he sub belt is between vertical and 20 degrees rearward.



http://www.schrothracing.com/sdocs/2009_...ctions.pdf



Also, make sure you don't drill through the round plug under the seat in the floor. With a five point harness this can be a bit tricky depending on your height. You may need a flat bar underneth to distribute the load over a wider area with a captive nut if this is the case. 5 point harnesses are not very common these days, the move is generally towards 6 point - more comfortable Han a 5 point too.

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[Cloud9...68]

[quote name='Eric_Oz_S2' timestamp='1363946345' post='140450']

5 point harnesses are not very common these days, the move is generally towards 6 point - more comfortable Han a 5 point too.

[/quote]

Sigh... Unfortunately, I'm running into this a lot - this is by far the most complicated thing I've ever undertaken, and while I haven't been bashful about asking for help when I've run into jams, I haven't asked questions about every single detail, so it has happened several times that I've chosen something based on my own research, installed it, only to hear, "you know, it would have been better if...". Oh, well, that's why experience is such a valuable commodity - live and learn. I don't feel like returning my 5-point - I'll use my stock belt when driving the car on the street, anyway.



Thanks very much for the install instructions - much appreciated.

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[craigawoodman]

Cloud,



I run a 5 point harness and have no problems. For DE events it is more than adequate. A 5 point harness is much better than a 4 point harness as it stops the buckle riding up and putting pressure on your belly, which is not comfortable at all. I tried a 4 point and felt sick, so went to the 5 point. If you so desire, you should be able to buy a different lower section which will still clip into the buckle, it just has two legs (that require two fixing points) and a spreader.



It is all relative. Any harness is better than just a seat belt. A 5 point is better than a 4 point. A 6 point is slightly better than a 5 point. Much better to have a 5 point and a HANS device than a 6 point alone, etc. it is a never ending slippery slope.



What you have installed is more than enough.

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[Eric_Oz_S2]

Cloud



I didn't mean to disuade you, I'm just surprised you found a 5 point - not many manufacturers make these anymore. As Craig said - it will be more than enough for what you need it for.

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[Cloud9...68]

Like I, and others have said, it's all a learning process (and a very slippery slope!). I'm sure once I get the car back on the track and get some seat time under its belt, I'll discover all sorts of things over time that I wish I had done slightly differently, and adjust accordingly.



As far as the harness, I didn't even know there was such a thing as a six-point. I just went with the brand and specs the guy who's building my roll bar recommended, and the 5-point was the first one that popped up on Summit Racing's site.

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[tamathumper]

Just get an 8-point and consider yourself future-proof.

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[Cloud9...68]

Anything to make that track time-withdrawal-induced twitch go away!

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[Contadino]

I used the Sparcos brackets (no sliders) but drilled a new hole in the correct position. Then used a heavy washer to spread the load. It wasn't easy but doable. I'm 6' and fit ok.

Sliders are easy to install because you can move the seat out of the way. Fixed brackets are a PITA.

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[Cloud9...68]

Just for clarification as to where to attach the lap belt mounts: I assume I should use the stock captive thread on the door side to mount the left lap belt, and that I have to drill a new hole in the tunnel, directly across from the captive nut on the door side, to mount the right lap belt. I know this seems obvious, but I just want to make sure. If this is correct, it's good news because the hole would go just far enough behind the seat that I could fit my drill back there without having to remove the seat. Does anybody happen to have a picture of how they mounted their lap belt of their harness on the tunnel side? Thanks.

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