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Old 09-19-2011, 03:10 PM   #1
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Default Harness and mounting

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.
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Old 09-19-2011, 05:05 PM   #2
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Mounted eyes for the lapbelts in place of the OEM seatbelt locations. Use washers so you can engage all thread and the eye faces the right direction for the belt to snap into. I have a proper seat with sub belt slots so I don't know about that.
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Old 09-19-2011, 10:05 PM   #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.
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Old 09-19-2011, 10:32 PM   #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



You can see the backing plates I made in this photo; they went on the underside of the car and transmission tunnel...



All mounted...


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Old 09-19-2011, 11:00 PM   #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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Old 09-19-2011, 11:05 PM   #6
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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.
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Old 09-19-2011, 11:06 PM   #7
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Quote:
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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?
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.
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Old 09-19-2011, 11:09 PM   #8
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Quote:
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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? Also, which harness is that--the G Force Pro H?
The eye ball bolts should screw right into the factory points. I will try to pull out my pass seat this weekend and get some pics for you.
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Old 09-19-2011, 11:15 PM   #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.
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Old 09-19-2011, 11:39 PM   #10
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Shoot them an email first and see if they offer an SCCA discount. I am almost positive that they do and it is about 10%.
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Old 09-20-2011, 12:02 AM   #11
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Quote:
Originally Posted by RavynX View Post
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.
Hey Chris where did you get that idea? Do this for sure. This is exactly the way I did the groin belt and it works fine. The only mistake I made was getting a 5-pt instead of a 6-pt groin belt but I will be fixing that soon enough. When I do, my eyebolts will end up in the same location as Chris'.
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Old 09-20-2011, 12:14 AM   #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.
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Old 09-20-2011, 12:24 AM   #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/#
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Old 09-20-2011, 01:03 AM   #14
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Crow > *, cheaper, and only $50 for a reweb.
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Old 09-20-2011, 01:10 AM   #15
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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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Old 09-20-2011, 07:33 AM   #16
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Care to elaborate? I've been perfectly happy with my Willans for the past couple of years and looking into an upgrade to 6pt. I've used a Schroth ASM system i a friends car and was not that impressed. (maybe because it's a failaids 4pt system)
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Old 09-20-2011, 08:40 AM   #17
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Quote:
Originally Posted by Savington View Post
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.
X2. I like the Schroth adjusters more than the Willans, but the Willans belt material is about on par with the Schroth material. I like the Schroth cam release mechanism more too, but I'm not sure if Willans offers something similar (I only had one Willans). Both are worlds comfier than Crow, G-Force, etc. and are nicer to use. You are paying for that difference though. On the upside, my Schroth stuff never loosened up over the course of a session like my brother's G-Force belts ALWAYS do. The Schroth 5/6-points are much nicer than their 4-points too.

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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Old 09-20-2011, 11:14 AM   #18
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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.
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Old 09-20-2011, 11:19 AM   #19
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Not even at safe racer?



If I were to do this again, I'd mount them right in front of the hump.
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Old 09-20-2011, 11:31 AM   #20
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Quote:
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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.
If you really need one in a hurry you can buy a 5-pt setup and then change out the parts on the groin belt.
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