I have recently decided to mount a 4 point harness, but will resort soon to a 5 point due to the submerging i have read on many threads. I will be running a bucket seat, 4 point harness using the snap-in ends of the harness.

Courtesy of ioportracing

These will be connected to 1.25-inch Eye Bolt with 7/16-inch shank i have order from ioportracing and takata, since i believe home depot eye bolts do not comply for automobile safety regulations.

The harness will be connected to a 5/6point roll bar. The roll bar has hole predrilled for the shoulder eye bolts.

My main concern is what would be the safest mounting point for the lap portion of the harness? I have heard and seen on threads that the existing 3 point stock harness located below is where most people mount the eye bolt.

courtesy pictures from spider2k


as for the other location, ive seen other people the other eye bolt which is mount parrallell to 3 point stock harness shown below.


if i do mount it to the transmission/exhaust piping location the other side will be backed with 2.25 inch Washer x 2 nuts.




Courtsey of IGGY


i will also add a cotter pin to prevent the nut from unscrewing shown below.
courtsey of IGGY


as far as angles for the maximum and minimum limit i do understand the lap harness and shoulder harness should be as followed.



the position of my seat will be similar to this picture.



Can anyone verify if the holes i chosen for the lap portion of the 4 point harness are correct?

Also, can anyone direct me to were i can buy seam sealer to compensate the holes i will be drilling into my vehicle? thanks.

I have search and came up with these threads. any other information would be greatly appreciated.


http://www.honda-tech.com/zerothread?id=517099
http://www.honda-tech.com/zerothread?id=287568
http://www.honda-tech.com/zerothread?id=226909
http://www.honda-tech.com/zerothread?id=286739
http://www.honda-tech.com/zerothread?id=162345
http://www.honda-tech.com/zerothread?id=179774
http://www.honda-tech.com/zerothread?id=469229

http://www.2phast.com/190E/harness.htm

http://www.bimmerworld.com/html/sabelt-fia...t-harnesses.htm

http://www.circletrack.com/howto/134_0406_...unt/index3.html

http://e30m3performance.com/installs/insta...ss/harness2.htm

http://e30m3performance.com/installs/insta...ss/harness2.htm

http://www.fd3s.net/harness.html

http://forums.beyond.ca/showthread/t-71479.html

http://forums.nasioc.com/forums/archive/in...p/t-434029.html

http://www.mr2.com/TEXT/sabelt.html

http://www.ntpog.org/reviews/safetyh.../harness.shtml

http://www.pelicanparts.com/techarticles/9...ss_install2.htm

http://www.rx7.org/Robinette/racing_seat.htm

http://www.rx7club.com/archive/index.php/t-120494.html

http://www.rx7club.com/archive/index.php/t-132662.html

http://www.soloperformance.com/schroth.htm

http://www.soloracer.com/harnschrothfaq.html

http://www.viperclub.org/instructions/harness.html

http://www.vtec.net/articles/view-ar...rticle_id=3228

http://www.sparcousa.com/resourceFiles/16.pdf

 

anyone?

 

I wouldn't touch the setup you are describing with a ten meter pole. Your choice, though.

 

Rusler--looks like you did some research and had your shit together before making your post. It's still hard to believe that after all these years there's still so much confusion regarding cages, bars and belts. Then again, with comments like Mike's it's no wonder there's still so many questions. Looks like that bar has a few compromises...not sure if that's the one you'll be using or not, but again, there aren't many choices out there.

In any case, as for your main question--your mounting point for the lap belts looks perfect and your choice of hardware is more than adequate.

 

How will you mount a 5th pt? Theres a frame rail that runs straight down the center of the seat under the car. I think most of the guys with harnesses have a 6pt.

 

I don't trust an eye bolt anchored to a sheet metal web and reinforced by large washers. If you do, that's your choice.

 

There's a big difference between "large washers" and a good sized (4" by 5" or so) backing plate with a welded nut behind said piece of sheet metal. That's an accepted mounting method by SCCA and others. Large washers, hell no, but that's not what it looks like he's doing.

 

Maybe I misunderstood what he was doing. It doesn't really matter -- the question is whether he understands what he is doing.

OK, never mind. I did misunderstand what he was doing. I missed the bit where he said he was anchoring the upper harness attachments into predrilled holes in the bar. I thought he was anchoring them into the wall of the tub behind the seat.

 

In that first picture of your roll bar... how did you have that plastic done? I have all that area exposed and what you have is exactly what I need to cover it up. Any help on that would be great

I have a 5pt harness installed by a race shop in VA. the lap belt holes are both on the floor.. Ill take a picture of them tomarrow.

 

Thats a Mugen Rollbar. They sell the shroud with the bar. You have to cut off your secretcompartment door for it though.