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4 point harnesses install

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Old Mar 30, 2006 | 01:55 PM
  #11  
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Originally Posted by Nobody,Mar 30 2006, 10:12 AM
Due to popular demand, though, the Go Fast Lab may soon be selling driving jackets silkscreened with Takata harnesses graphics that make it APPEAR that the driver is wearing a true 4 point system. Ultra JDM right there, yo!
!!!!!!!! You're on to something! *calling silkscreener*
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Old Mar 30, 2006 | 02:10 PM
  #12  
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Forget it I already called.
We got denied for rice boy green, and crushco blue as they have mad exclusive jdm rights on them.

Stickers? I'll try the vinyl guy...bring your own jacket?
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Old Mar 31, 2006 | 12:06 PM
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Okay, I'm sure everyone here will dismiss what I'm about to ask simply because someone in this thread mentioned a piece of JDM merchandise, but here goes anyway.....

Okay first of all forget about the fact that that device was made by ASM. Pretend it was made by a US company and didn't cost an arm and a leg....

Now since we haven't seen it installed in a car, I can't be 100% sure, but it looks as if the upper part of the bar is designed to be mounted on the upper portion of the bulkhead behind the driver seat (maybe even to the points for the stock roll hoops??). The idea being that the harness straps go over the bar and then route downward to the second bar with the eye bolts in it (whether this is attached to the floor or lower down on the bulkhead I don't know) so that the straps come away from the racing seat closer to the perpendicular (whether it was within the optimal 15 degrees or not, I don't know).

Now lets say that my guess above is correct and it would allow me to mount the harnes in such a way that the upper straps were 15 degrees (or thereabouts) from the perpendicular. Lets also assume for a moment that someone wants to mount a harness in their car to use a race bucket to get better support for HPDE and the like but is NOT keen on installing a roll bar (I'm short enough that my head with a helmet would clear the stock roll protection) because of the insurance implications on their particular insurance plan.

If all of the above is the case, would such a set up prove safe with a 5 or 6 point harness (since the stock roll hoops provide my rollover protection and the 5th point of the harness would hold the belt down on my lap and prevent submarining).

Forget that the contraption is made by ASM and was overly expensive. Say I had a similar piece fabbed, in *my* situation would that prove safe? What do ya think?
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Old Mar 31, 2006 | 12:08 PM
  #14  
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PS> I'm looking for a way to work that because I'd like to put a bucket like a Bride Zeta III in or the like and to me, the high sidewalls of the seat hold the seatbelt away from you if you were to use the stock restraint and look like it would be unsafe as well.

Just looking for options to stop sliding around the seat
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Old Mar 31, 2006 | 12:14 PM
  #15  
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Originally Posted by 1AP12NV,Mar 31 2006, 01:06 PM
Say I had a similar piece fabbed, in *my* situation would that prove safe? What do ya think?
You would have to be really careful about trying to mount the thing to the roll hoop hard points. The bar will bring loads in a different direction. It would need to be checked out carefully.

If some competent engineer had actually done the work on it to be sure it was safe, then it might be an idea. But it would only work for fairly short people.
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Old Mar 31, 2006 | 04:48 PM
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Defining what is safe is very subjective...
You can fab anything you like at your own risk. No one here will endorse it as being safe. Even if they did, would you trust or bet your life on someone's non-qualified opinion?

Judging those two ASM towel racks, they could cost $10 each from a hardware store. That is besides the point. ASM makes high quality products, some of the nicest from Japan since they have tons of R&D funding from Autobacs. These are harness bars not rollbars. So they add no benefit to rollover protection. Will they hold you in a seat better?-yes probably.
Is it more comfortable for HPDE?-yes, probably. Is it safer for HPDE?-only you can decide that...

*Guessing*
One of those towel racks goes on the floor behind the seat by the rear seat mount bolts (the one with eyebolts) for the clip in lap belts. The other (smaller) mini towel rack goes behind and through the black panel. This connects to shoulder belts.

Rollbar, harness, seat, hardtop. That is the benchmark.
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Old Mar 31, 2006 | 04:54 PM
  #17  
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From the ASM webpage:

We (ASM) recommend roll cage / bar (4 or more points) from safety standpoint but this part is for those who want to use harness from a fashion standpoint.
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Old Mar 31, 2006 | 04:58 PM
  #18  
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Ah Jdm san, thank you for honorable reply. Even by the manufacturer in Japan, these are considered fanboi parts to enjoy the mad tite jdm lifestyle yo!
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Old Mar 31, 2006 | 04:59 PM
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[QUOTE=Asura,Mar 31 2006, 05:58 PM] Ah Jdm san, thank you for honorable reply.
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Old Mar 31, 2006 | 05:36 PM
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Mechanical engineer here
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