Harness and mounting
#1
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I need to get my harness and mounting supplies ordered right now. Need to get everything in one shot, and don't have time to wait for shipping if I forget something.
Anyone have pics and/or recommendations for a 6 point harness solution in a NB? My roll bar has tabs for the shoulder straps. My seat does not have slots for the sub belts, so I was planning on running them under the thighs and to the lap belt mounts, which as far as I can tell is SCCA approved. Over the winter, I'll get a better seat with sub harness slots in it (I don't want to cut this one so I can resell it easily). Car will only got to an autocross and drag strip until then. No street, no wheel to wheel. I will remount the sub belts later at 20° back when I get the new seat, in prep for STL next year.
How did you guys mount your lap belts? Plates? Eye hooks? I need spoon feeding. I like doing it myself, but can't afford the downtime if I order wrong. Event fees and hotel is paid $$$. School me.
Anyone have pics and/or recommendations for a 6 point harness solution in a NB? My roll bar has tabs for the shoulder straps. My seat does not have slots for the sub belts, so I was planning on running them under the thighs and to the lap belt mounts, which as far as I can tell is SCCA approved. Over the winter, I'll get a better seat with sub harness slots in it (I don't want to cut this one so I can resell it easily). Car will only got to an autocross and drag strip until then. No street, no wheel to wheel. I will remount the sub belts later at 20° back when I get the new seat, in prep for STL next year.
How did you guys mount your lap belts? Plates? Eye hooks? I need spoon feeding. I like doing it myself, but can't afford the downtime if I order wrong. Event fees and hotel is paid $$$. School me.
#3
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Thanks. I think I'm over complicating it, which is what I usually do when doing new things (I've never owned a car with harnesses before, and have never mounted them). Kind of funny with how many race cars I see and touch, but I've never paid attention to how the harnesses are mounted.
Anyway, this is how I see it happening...
-The shoulder straps mount to tabs on the roll hoop
-The lap belt outside can bolt into the stock seatbelt location
-The lap belt inside requires a new hole with backing plate in the trans tunnel
-I read that some of the SM guys run the sub belts under their thighs and out the side holes of the seat to the same locations that mount the lap belt. I don't see how the sub harness are long enough though. A quick measurement shows that a 24" G Force sub harness is 6" too short. Not sure about that yet, but I don't want to drill the bottom of the car until the new seat is in.
I plan to get a new seat with sub harness slots this winter so I can mount the subs under my hips, but I can't do that quite yet. The seat cost is factored into my challenge budget, so I'm stuck with what I've got.
Anyway, this is how I see it happening...
-The shoulder straps mount to tabs on the roll hoop
-The lap belt outside can bolt into the stock seatbelt location
-The lap belt inside requires a new hole with backing plate in the trans tunnel
-I read that some of the SM guys run the sub belts under their thighs and out the side holes of the seat to the same locations that mount the lap belt. I don't see how the sub harness are long enough though. A quick measurement shows that a 24" G Force sub harness is 6" too short. Not sure about that yet, but I don't want to drill the bottom of the car until the new seat is in.
I plan to get a new seat with sub harness slots this winter so I can mount the subs under my hips, but I can't do that quite yet. The seat cost is factored into my challenge budget, so I'm stuck with what I've got.
#4
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Don't run the sub belts to the seat bolts. Bolt them directly to the floor if you can. I was able to put eye bolts on both lap belts and both sub belts since my seat isn't directly on the floor.
Root photo folder: http://s389.photobucket.com/albums/o...Miata/harness/
All of this purchased at I/O Port Racing
Item Purchased per seat: http://www.ioportracing.com/Merchant...tegory_Code=MH
![](https://www.miataturbo.net/attachments/race-prep-75/25060-harness-mounting-0d4d0c34.jpg?dateline=1316482369)
You can see the backing plates I made in this photo; they went on the underside of the car and transmission tunnel...
![](https://www.miataturbo.net/attachments/race-prep-75/25057-harness-mounting-df8cef07.jpg?dateline=1316482369)
All mounted...
![](https://www.miataturbo.net/attachments/race-prep-75/25058-harness-mounting-6ed219bd.jpg?dateline=1316482369)
Root photo folder: http://s389.photobucket.com/albums/o...Miata/harness/
All of this purchased at I/O Port Racing
Item Purchased per seat: http://www.ioportracing.com/Merchant...tegory_Code=MH
![](https://www.miataturbo.net/attachments/race-prep-75/25060-harness-mounting-0d4d0c34.jpg?dateline=1316482369)
You can see the backing plates I made in this photo; they went on the underside of the car and transmission tunnel...
![](https://www.miataturbo.net/attachments/race-prep-75/25057-harness-mounting-df8cef07.jpg?dateline=1316482369)
All mounted...
![](https://www.miataturbo.net/attachments/race-prep-75/25058-harness-mounting-6ed219bd.jpg?dateline=1316482369)
![](https://www.miataturbo.net/attachments/race-prep-75/25059-harness-mounting-8adff7a5.jpg?dateline=1316482369)
#5
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I ordered all my eyeball bolts and snap hooks from http://www.apexperformance.net/. All the mounting things were G-Force and it shipped from Atlanta so you will probably get it in a day. I ordered the G-Force 6 point sub straps from them and got them in a day. They might be able to get you a full harness.
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Awesome, thanks Chris. Does the eye bolt for the outside lap belt thread right into the boss for the factory belt?
Is this the harness you have?
http://www.apexperformance.net/CartGenie/prod-896.htm
Thanks for the lead Lars. I've contacted a couple places today, and they've told me the G Force is on b/o for 30 days +. I'll try those cats tomorrow.
Is this the harness you have?
http://www.apexperformance.net/CartGenie/prod-896.htm
Thanks for the lead Lars. I've contacted a couple places today, and they've told me the G Force is on b/o for 30 days +. I'll try those cats tomorrow.
#7
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Yep! I believe there's a standard thread-pitch and size for seat belts. For the backing plates I just picked up two strips of 1/8" thick steel and chopped it into 4"x3" plates and drilled a 5/16" hole through the center. I was stupid and didn't paint mine so they're rusting; I need to go back and either fix those or replace with aluminum plates.
#9
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Bad @ss. Thanks guys.
You don't have to worry about it Lars, I got it. My car doesn't have a factory lap belt boss on the tunnel, that was an NA thing. I get to drill.
I'll order this one tomorrow with the mounting hardware from the same site. A couple bucks more than Chris' link, but it will all come from the same place.
You don't have to worry about it Lars, I got it. My car doesn't have a factory lap belt boss on the tunnel, that was an NA thing. I get to drill.
I'll order this one tomorrow with the mounting hardware from the same site. A couple bucks more than Chris' link, but it will all come from the same place.
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#12
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I used the stock bolts for the lap belts, a bolt & 1" square of steel (1/8" thick) for the nut strap, and wrap the shoulder straps on the harness bar. If you're going to use eye-bolts some groups make you safety-wire them shut. I have to run a special set-up for my extremely large sex organs.
#13
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This is what im running in my car. I love it! Its the same price too. Either way i think you'll be happy with what you end up with.
http://www.corbeau.com/products/harn...arness_belts/#
http://www.corbeau.com/products/harn...arness_belts/#
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The first time you touch/use a set of Schroth belts, you will kick yourself for not spending the extra money on them. I had Willans belts in my car for a while, sold them and switched to Schroth belts, and I will never use anything else.
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On a sidenote, the tabs the OP has on the harness bar look great! Best version of that I've ever seen. Its kind of scary to see how a lot of the NASCAR/Stock Car guys do it (little trapezoid of metal with one side welded directly to the bar). Apparently it does the job though. I am curious why you opted for this instead of the wraparound style?
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G Force 6 point isn't in stock anywhere. :(
The lady at Apex Performance was very nice. I wish I could have made a purchase from her.
Stinky,
My cage builder and I thought that the mounting tabs on the roll hoop would be more secure than wrap around. I think it came out great.
The lady at Apex Performance was very nice. I wish I could have made a purchase from her.
Stinky,
My cage builder and I thought that the mounting tabs on the roll hoop would be more secure than wrap around. I think it came out great.