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4 point harness

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Old Jun 8, 2012 | 06:26 AM
  #16  
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Originally Posted by Graphic
How much movement does that belt allow? How's the comfort, does it rub on your neck at all? Could I mount the belt to a harness bar? I have one I will be using until I get my cage installed.

I do plan on designing and having a cage made that will allow for a sun roof and a back seat so I can fit at least 4 people in my car. I know that isn't a 100% full race cage, I bought a 4 door for a reason. I think the cage will pass tech spec and allow for real safety. I would like to pad as much of the cage as possible to avoid injuries to passengers since most of the time my car will be on the street.
The inertia reel allows you to move your upper torso fwd off the back of seat. The reel will lock up when under hard braking or cornering. The lap belt, of course, keeps yo rear end tied to the seat. (Like I said, its a HP street/track day belt). You would need to install a toggle switch to shut the 12V off to full lock up the reel if you want that on the track. (I run track days with the reel active & works well for me)

Warning: Using a fully locked up 4 point harness on the street is not safe. In a frontal impact your neck will disconnect itself & death or paralysis possible. Your upper torso has to have some fwd movement in a frontal impact. Also, The Schroth belts have the ASM safety feature (anti-submarine). Read about it. It has a strap release feature to allow additional fwd movement in the event of a frontal impact

It doesent rub my neck in any way. Dont think you could mount the AutoControl to a harness bar or roll bar. The reel must be mounted to a certified reel mount. Mine is mounted to the middle seat reel point

Peace, Joe
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Old Jun 8, 2012 | 06:42 AM
  #17  
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Originally Posted by MinusPrevious
...Warning: Using a fully locked up 4 point harness on the street is not safe. In a frontal impact your neck will disconnect itself & death or paralysis possible. Your upper torso has to have some fwd movement in a frontal impact. Also, The Schroth belts have the ASM safety feature (anti-submarine). Read about it. It has a strap release feature to allow additional fwd movement in the event of a frontal impact ....
Joe do you know this to be 100% true?

What would be the difference of not driving on the street without an Hans device and a 4 point? Seems like you just replicated the same scnario.

That being said Viper ACR's back in the day came with harnesses and were street legal, so at that time it passed gov. safety standards... and I believe there are newer cars which do as well.
Also, more commonly today, cars are being equpit with seatbelt pre-tensioners, a charged explosive device which tightens the lap/sholder belt to decrease the torso motion in the even of a crash, reacts faster than the inertia tensioner.
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Old Jun 8, 2012 | 07:24 AM
  #18  
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Originally Posted by GTijoejoe
Joe do you know this to be 100% true?

What would be the difference of not driving on the street without an Hans device and a 4 point? Seems like you just replicated the same scnario.

That being said Viper ACR's back in the day came with harnesses and were street legal, so at that time it passed gov. safety standards... and I believe there are newer cars which do as well.
Also, more commonly today, cars are being equpit with seatbelt pre-tensioners, a charged explosive device which tightens the lap/sholder belt to decrease the torso motion in the even of a crash, reacts faster than the inertia tensioner.

Dont work for NHTSA or Schroth.

My belief is that any locked up harness w/out a HANS is not optimum & potentially dangerous

On the street, the safety belts & air bags are to work together as a system. One not to be used w/out the other IMO.

I feel that using the Schroth Auto Control in conjunction w/ the air bag is the safest way to go on the street or track (If I ever convert over to a full 4 or 5 point harness I will certainly be using a HANS or similar restraint system
Heres a test performed by Schroth that shows how the system works.

Joe

http://www.schrothracing.com/docs/SchrothASMII.wmv

Last edited by MinusPrevious; Jun 8, 2012 at 08:05 AM.
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Old Jun 8, 2012 | 10:20 AM
  #19  
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Originally Posted by MinusPrevious
Dont work for NHTSA or Schroth.

My belief is that any locked up harness w/out a HANS is not optimum & potentially dangerous

On the street, the safety belts & air bags are to work together as a system. One not to be used w/out the other IMO.

I feel that using the Schroth Auto Control in conjunction w/ the air bag is the safest way to go on the street or track (If I ever convert over to a full 4 or 5 point harness I will certainly be using a HANS or similar restraint system
Heres a test performed by Schroth that shows how the system works.

Joe

http://www.schrothracing.com/docs/SchrothASMII.wmv


Wow that does look pretty nice.. My only issue with this setup is I'm trying to keep my back seats. Is there any viable option? I am okay with not having room for a middle passenger as I don't want 5 people in my car anyways..
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Old Jun 8, 2012 | 10:54 AM
  #20  
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From: So.Cal
Originally Posted by Graphic
Wow that does look pretty nice.. My only issue with this setup is I'm trying to keep my back seats. Is there any viable option? I am okay with not having room for a middle passenger as I don't want 5 people in my car anyways..
Here's my older setup where I was using the rear seats. The middle seat belt position, as you know, is gone
You can run both the stock belts & the Schroth & still carry 4 passengers. You just need to use the quick disconnect


LOL I should work for Schroth. Really just like showing off my system because I like it so much & no one else runs it. EDIT: One added pic of my little beast if you dont mind

Joe




Last edited by MinusPrevious; Jun 8, 2012 at 10:57 AM.
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Old Jun 8, 2012 | 11:17 AM
  #21  
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Originally Posted by MinusPrevious
Warning: Using a fully locked up 4 point harness on the street is not safe. In a frontal impact your neck will disconnect itself & death or paralysis possible. Your upper torso has to have some fwd movement in a frontal impact. Also, The Schroth belts have the ASM safety feature (anti-submarine). Read about it. It has a strap release feature to allow additional fwd movement in the event of a frontal impact
actually joe, Scroth does sell a 4pt harness that is DOT approved. On the rear of the harness behind the seat they sew in a folded flap in the harness that breaks away in an impact allowing your right shoulder to slip out of the harness.

It's not going to be pretty, but all that fear mongering is greatly reduced

You can see the fold in the pic to the left of the clip on the right harness strap going to the seat
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Old Jun 8, 2012 | 03:03 PM
  #22  
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Originally Posted by chrisw
actually joe, Scroth does sell a 4pt harness that is DOT approved. On the rear of the harness behind the seat they sew in a folded flap in the harness that breaks away in an impact allowing your right shoulder to slip out of the harness.

It's not going to be pretty, but all that fear mongering is greatly reduced

You can see the fold in the pic to the left of the clip on the right harness strap going to the seat
Chris. You may have mis-understood. I was not debating /confused about 4pts vs 3pts & DOT approvals. We were just discussing the danger in being fully locked into a harness w/ no reel & w/out using a HANS

Also, That sewn in flap, covered w/ the plastic cover is the limited break-a-way that allows just enough body rotation during a frontal to prevent the submarining effect. It certainly does not allow your right shoulder to slip out


Joe
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