Harness and harness bar

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danegrey
Posts: 17
Joined: Sun Jan 24, 2016 7:35 pm

Harness and harness bar

Post by danegrey » Tue Apr 10, 2018 7:45 pm

I have a question, I drive the black cherry 370Z, and I made the last autocross...
I am also going to do Track Night at Road Atlanta later this month.

My question concerns how a racing harness should be attached to the harness bar?
Is there any rules as how many times it has to be thru the harness clip.

thanks for the help
David A Negrey
2012 370Z Sports Package
nismo like spoiler
Michelin Super Sport 4s
and many more things

MARKP
Posts: 9044
Joined: Sat Dec 06, 2003 3:51 pm
Location: Farragut, TN

Re: Harness and harness bar

Post by MARKP » Tue Apr 10, 2018 11:16 pm

Grassroots Motorsports had a pretty good article about this subject. I have no clue if Track Night in America would have any different requirements.

https://grassrootsmotorsports.com/artic ... g-harness/
Mark Pilson
East TN Region RE
SEDiv SDC

danegrey
Posts: 17
Joined: Sun Jan 24, 2016 7:35 pm

Re: Harness and harness bar

Post by danegrey » Wed Apr 11, 2018 3:59 pm

thanks, that is a great article
David A Negrey
2012 370Z Sports Package
nismo like spoiler
Michelin Super Sport 4s
and many more things

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Wheelman_13
Posts: 1809
Joined: Sun Sep 03, 2006 11:42 pm

Re: Harness and harness bar

Post by Wheelman_13 » Fri Apr 13, 2018 11:33 am

Supplementing Mark's link, Schroth also has some general instructions in a "race harness installation guide" PDF

https://www.schroth.com/en/segments/rac ... tions.html

The big thing to pay attention to is the mounting angle for the shoulders so as to avoid spinal compression.

I *think* if done right a harness bar and harness should pass tech at a TNIA as long as it's a 5+ point harness (4pt are generally frowned upon because no submarine protection). Be aware you may catch flak from some for running a harness without a roll hoop. The actual added risk factor there is *highly* debated and the subject of a lot of bad armchair engineering and sweeping generalizations, so it will depend on the organization....but something to watch out for in tech requirements if you decide to do more events with other track day providers/clubs.
Richard Graves
1992 NSX | youtube.com/lapoftheworld

danegrey
Posts: 17
Joined: Sun Jan 24, 2016 7:35 pm

Re: Harness and harness bar

Post by danegrey » Sun Apr 15, 2018 12:19 pm

well that will make it interesting, the driver seat is 5 point the passenger is 4 point...
but the seatbelts were never taken out of the car, so I guess I will live and learn...

all thanks for the help
David A Negrey
2012 370Z Sports Package
nismo like spoiler
Michelin Super Sport 4s
and many more things

flier129
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Joined: Tue Feb 12, 2008 12:50 pm
Location: Knoxville, TN

Re: Harness and harness bar

Post by flier129 » Tue Apr 17, 2018 8:45 am

Another small piece with shoulder harnesses and a harness bar, guide clamps:
https://www.discoveryparts.com/auto-rac ... -8005.html

They'll help with lateral movement of your shoulder harnesses. I've unfortunately noticed bad spacing on shoulder straps on bars in some cars I've riden in...... including my own!
Marcus Luttrell - 99' Miata - TTE #92

danegrey
Posts: 17
Joined: Sun Jan 24, 2016 7:35 pm

Re: Harness and harness bar

Post by danegrey » Thu May 10, 2018 6:15 pm

flier129 wrote:
Tue Apr 17, 2018 8:45 am
Another small piece with shoulder harnesses and a harness bar, guide clamps:
https://www.discoveryparts.com/auto-rac ... -8005.html

They'll help with lateral movement of your shoulder harnesses. I've unfortunately noticed bad spacing on shoulder straps on bars in some cars I've riden in...... including my own!
Yes late in reviewing this, but I do not understand how it all suppose to work? Any Pics
David A Negrey
2012 370Z Sports Package
nismo like spoiler
Michelin Super Sport 4s
and many more things

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