Schroth 4 point harnesses

sicksubie · #1 12-25-2007, 02:40 PM

I installed my 4 point harnesses this morning. The install took about 30 minutes or so, but was easier because my back seat is already out. Here are some pics...

Shoulder belts are connected where the rear seat buckles bolt in. you simply replace the stock bolt with a ring bolt.....

Speedklix · #2 12-25-2007, 03:34 PM

looks good bobby.

Would adding a heavy bracket to push the rings out to the point you can snap the harness on without removing the rear seat/buckles be legal?

SVXRide · #3 12-25-2007, 04:33 PM

Bobby,
"Danger Will Robinson, Danger!!" Shoulder harnesses should have their attachment point at the same level as the top of your shoulders or they can actually impart serious damage on your body in the event of an accident. I'd suggest using the anchor point for the baby car seat that's located on the rear deck, as it will keep the belts ~ parallel with the floor of the car.
-Bill

sicksubie · #4 12-25-2007, 04:36 PM

Really now.... I installed per Schroth instructions that came with it...

sicksubie · #5 12-25-2007, 04:39 PM

I also do not know if this is important or not but these shoulder straps actually have a tear away feature. In the event of an accident (one that would throw you foward) the outside shoulder strap actually will tear away allowing your body a few inches of forward movement giving a cushioning effect. The strength of the stitching is based on your weight.

sicksubie · #6 12-25-2007, 04:41 PM

Quote:

Originally Posted by Speedklix

looks good bobby.

Would adding a heavy bracket to push the rings out to the point you can snap the harness on without removing the rear seat/buckles be legal?

I could still have my rear buckles in if I wanted to. However there are no seat belts back there at all. Nobody rides back there ever so I removed them along with stripping the trunk out.

SVXRide · #7 12-25-2007, 05:09 PM

Bobby,
Right out of the Schroth installation instructions:

SHOULDER BELT ROUTING
􀂾 Shoulder belts must run from the shoulders horizontally or down, at no
more than a 20° angle.
􀂾 In cases where the shoulder belts must be routed down to the chassis
floor, support by a roll cage bar or harness guide at the appropriate
height is essential to establish the horizontal shoulder strap routing off
the shoulder/HANS®. Most racing seats are not designed and tested to
carry shoulder belt crash loads from downward installation. Severe
injury or death could result. A 45° downward shoulder belt installation is
possible with seats that SCHROTH has positively tested to take a load
measured during a 50 kph [31 mph] and 28 G impact. Refer to the list
of SCHROTH approved racing seats in section “Bolts, Seats and Stuff”.
WARNING: 45° downward shoulder belt installation must never be
used with HANS®.

You really, really need to change the anchor points.
-Bill

Speedklix · #8 12-25-2007, 05:49 PM

Quote:

Originally Posted by SVXRide

I'd suggest using the anchor point for the baby car seat that's located on the rear deck

Great tip!

I think bobby is putting bride seats in, so if his seat is listed these mount points would be good, yes? just no good with the current setup.

Quote:

Originally Posted by sicksubie

I could still have my rear buckles in if I wanted to. However there are no seat belts back there at all. Nobody rides back there ever so I removed them along with stripping the trunk out.

Just checking for people like me who hope to keep interior and want to just snap the harness in on the weekend without ripping stuff out. Leaving it in might look cool though I guess

sicksubie · #9 12-25-2007, 06:03 PM

wow... my instructions do not say that anywhere... In addition to the instructions I also followed a DIY on NASIOC for installation of 4 point harnesses. Where are the mounting points you are talking about, Bill? I will be putting a rear seat back in too when I am done. Would that not interfere? Also this belt is only used during auto-x's where an accident is extremely unlikely. I will not be wearing this while just daily driving. So, based on that the seatbelt is more for holding me in the seat than for actual safety reasons (that would change if I were to run at Lime Rock though)

Mike, the shoulder belts have the release snaps but the lap belts do not. The inside belt attaches to where the seat bolts to the center hump and the outside one bolts to the seat belt mounting bolt. So, you would still have the lap belts to contend with during the non-race times.

Speedklix · #10 12-25-2007, 06:23 PM

Quote:

Originally Posted by sicksubie

Mike, the shoulder belts have the release snaps but the lap belts do not. The inside belt attaches to where the seat bolts to the center hump and the outside one bolts to the seat belt mounting bolt. So, you would still have the lap belts to contend with during the non-race times.

Aha.. well at least it would still be easy to stuff them under the seat.

Speedklix · #11 12-25-2007, 06:31 PM

Quote:

Originally Posted by sicksubie

Where are the mounting points you are talking about, Bill? I will be putting a rear seat back in too when I am done. Would that not interfere?

the impreza one would probably cause an issue, unless you're okay with the slack that would be added to snake the belts around/over the seatback. Or did you get it to fold down? If it folds down, then I imagine you'd be good.

sicksubie · #12 12-25-2007, 06:45 PM

I am putting a stock back seat in....

sicksubie · #13 12-25-2007, 06:56 PM

http://forums.nasioc.com/forums/show....php?t=1359814

SVXRide · #14 12-25-2007, 08:16 PM

Bobby,
I had my machinist/welder fabricate a bracket to extend the attachment point forward as the shoulder harnesses weren't long enough to reach all the way back. I also had the rear seat modified by the same woman who recovered by Corbeau seats.
-Bill

sicksubie · #15 12-25-2007, 08:20 PM

pics dont work.....

and what do you mean "extend forward"?