Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB
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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Tracking / Autocross / HPDE / Drifting (https://www.ft86club.com/forums/forumdisplay.php?f=39)
-   -   Anyone using a 4-pt harness with stock seats? (https://www.ft86club.com/forums/showthread.php?t=22637)

sirwin 02-04-2015 09:02 PM
Thanks! I have been getting conflicting info on the safety of this kind of set up, the angle of the rear straps and the use of the head rest to keep them over the shoulders. I was also wondering about using the rear car seat anchors up on the window ledge.
Lastly, do you keep the harness in the car at all times or remove between track days?

Thanks again.

aznatama 02-04-2015 09:38 PM
What is this CGLock thing? I've never used one...

tie strap to stock seat slider adjuster, slide seat all the way back, strap in stock 3pt, force it to "lock," use strap to lift rail lock and slide forward.

That's as good or better than a poorly executed 4pt install... but I guess some people just want to be boy racer. To each their own, just make sure you only use it on the track where you have a bit more control over your car, lest you be t-boned and roll over, thereby snapping your neck on a city street.

ddeflyer 02-04-2015 11:22 PM
I always get a little nervous when I see those schroth belts with such a low anchoring point. I'm sure they know what they are saying, but I still worry that a hard head on into a wall would end up compressing your spine as you move forward. Maybe the break away portion of the belt would change that effect though.

Black Tire 02-05-2015 12:10 AM
Quote:
Originally Posted by Aznsky (Post 566949)
^Corrected

I'm not a big fan of harness bars. Reason is that the intent of the harness is to keep you strapped in place, and in the chance that you roll the car over, your head is basically stuck in place and the roof will crush your head first. With the oem 3 point style, it allows the body to bend sideways and away from the roof.

Now the chances of rolling a car over in autox is very slim, so a harness bar and 4 pt should be ok. But if the car is going to any sort of track, I'd highly recommend either the stock 3 point with a CG lock (and yes your left foot will get really tired from supporting you, I've had mine even cramp on really hot days) or a correct 5 point with a custom rollbar.

Just my opinion.
This is why I started this thread:

Show us your Custom Roll Cage or Roll Bar

Quote:
Originally Posted by aznatama (Post 2118818)
What is this CGLock thing? I've never used one...

tie strap to stock seat slider adjuster, slide seat all the way back, strap in stock 3pt, force it to "lock," use strap to lift rail lock and slide forward.
I tried this in my FR-S. Didn't work for me, even though I have used this method in other cars. It seems there is just too much movement in the stock seat for this to work for me; the seatbelt just always loses its lock after a few hard turns. I will be buying a CGLock until I can afford a better option.

l8apexr 04-14-2015 12:04 PM
Quote:
Originally Posted by mike2100 (Post 579297)
Way too low
FIA says 45deg is OK. 10 is recommended.

l8apexr 04-14-2015 12:05 PM
Quote:
Originally Posted by 7thgear (Post 566973)
here is what FIA has to say about 4 points

scroll down to section 6.1 through 6.3

http://argent.fia.com/web/fia-public.nsf/DA58BF07DFFA863FC1257690003E34B6/$FILE/253%20%2810-11%29-161209.pdf
So it looks like FIA says 45deg is OK, but 10deg is recommended. Therefore lower anchors should be ok I believe.

7thgear 04-14-2015 12:09 PM
Quote:
Originally Posted by l8apexr (Post 2212066)
So it looks like FIA says 45deg is OK, but 10deg is recommended. Therefore lower anchors should be ok I believe.


whether something is okay or not will be revealed during a crash


people have had crashes with bad equipment and walk away unscathed,


FIA says they test things.. and so they make their guidelines, they have their threshold levels of supposed injury, etc.

wparsons 04-14-2015 12:50 PM
In addition to needing a rollbar (or full cage), you NEED to use a HANS (or similar) device if you're going to run 4+ point belts that don't have a break away section like the Schroth ones. Running locked 4 points without a HANS is just asking for neck injuries.

Quote:
Originally Posted by ddeflyer (Post 2118962)
I always get a little nervous when I see those schroth belts with such a low anchoring point. I'm sure they know what they are saying, but I still worry that a hard head on into a wall would end up compressing your spine as you move forward. Maybe the break away portion of the belt would change that effect though.
I would bet that is exactly the reason. With the inner shoulder belt tearing and extending you're not being held so firmly and compressed.

mrk1 04-14-2015 03:51 PM
http://i139.photobucket.com/albums/q...pssttl3ibb.jpg

My setup, custom welded in roll bar with harness bar. 4 Point Schroth harness's, these are the correct belts for this application. ASM in the 3" shoulder strap, 2" bolt in lap belts. Street legal PRESS buckle.

Takata Drift harness's can also be ordered in this spec.

When I finish my seat mounts I will switch to a proper fixed back seat and add the crotch straps. I had the buddy club mounts but wasn't happy with them.

klittl06 04-14-2015 04:46 PM
I recently got the scrothe rallye 3 for autox. It mounts the seat belt reel location in the back seat, so there's no issue with the angle (which I've read there is with the 4 in our cars). It quickly and easily breaks down (not completely removes) for when you don't need it. I'm pretty slim so the cg lock with the long buckle in our drivers seat didn't sound like a good fit for me. I've also read they're prone to breaking but I can't confirm or deny that.

It worked great at the first autox event over the weekend.

l8apexr 04-14-2015 11:04 PM
Quote:
Originally Posted by wparsons (Post 2212122)
In addition to needing a rollbar (or full cage), you NEED to use a HANS (or similar) device if you're going to run 4+ point belts that don't have a break away section like the Schroth ones. Running locked 4 points without a HANS is just asking for neck injuries.



I would bet that is exactly the reason. With the inner shoulder belt tearing and extending you're not being held so firmly and compressed.
Rollbar or full cage is best. agreed. Unfortunately I will be running w o the rollbar or cage. But harness w Hans.

wparsons 04-14-2015 11:31 PM
What harnesses? I'm hoping Schroth makes a direct fit for the twins, but nothing yet.

l8apexr 04-16-2015 01:51 AM
Takata drift II. Two inch shoulder, perfect for HANS!


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