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 Post subject: Seat Mounting Rules
PostPosted: Fri Dec 27, 2019 5:04 am 
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Joined: Mon Jan 05, 2015 8:45 am
Posts: 180
OK, I'm a bit confused. I remember SCCA having a requirement for seat back braces on non FIA8855-1999 seats and that, if a seat is expired, the seat back brace is then required (may or may not be a good idea). I'm looking to fit a new seat and wanted to review the rules and have read (and re-read) 9.3.41 of the GCR as well as 9.1.5.10 of the Production Specifications. I find no requirement for said brace.

Can someone please point me in the right direction?

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Bill H
92 Saturn SL2 - SCCA F-Production


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 Post subject: Re: Seat Mounting Rules
PostPosted: Fri Dec 27, 2019 9:28 am 
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Joined: Thu Feb 28, 2019 5:57 am
Posts: 74
Seat back braces are no longer required. Seat must now be "securely mounted". 9.3.41

Because of the long-standing argumentatation of seat mounting, and varying interpretations of the prior objective regs, the reg was changed to be intentionally subjective.

Cue the seat mount debatation.

I was the person that, some 10+ years ago, worked with seat manufacturers to lobby to get the regs changed to not require seat back braces on FIA seats (because, per their engineers, that's actually more dangerouser). It took no more than 27 microseconds before someone started arguing that FIA seats should have a seat back brace when the FIA cert expires after 5 years (because, apparently, that's more safer). Then SCCA added a reg to override the 5-year requirement to an on-condition inspection (like we do with, for example windows nets and fuel cells) then someone started another bonfire claiming we were killing children again.

Basically, no matter what regs SCCA wrote, someone came out and demanded change because children were going to die. So SCCA said, "eff it" and changed to today's reg.

Work with your local tech inspector because ultimately they're the one you need to satisfy. Just watch out if you go out of region (like, the Runoffs) and someone goes off on a seat jihad.


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 Post subject: Re: Seat Mounting Rules
PostPosted: Fri Dec 27, 2019 7:51 pm 
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Joined: Mon Oct 26, 2009 1:45 pm
Posts: 230
A couple months ago, there was a video going around, of a pretty bad crash of a golf. It was incar video, that showed the shoulder belts tearing out of the anchors and the seat coming off the mountings. I'd kind of like to review that. if anyone has the link.

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Dick Gagliardi
Chicago region
H Production VW Scirocco


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 Post subject: Re: Seat Mounting Rules
PostPosted: Fri Dec 27, 2019 9:40 pm 
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Joined: Tue Dec 31, 2013 10:40 am
Posts: 406
Location: Huntsville, AL
Spring for this bad boy:
https://racetech-usa.com/shop/RT4100HR-motorsport-seats

Problem solved forever.

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Brett W
Huntsville, AL


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 Post subject: Re: Seat Mounting Rules
PostPosted: Sat Dec 28, 2019 5:02 am 
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Joined: Mon Jan 05, 2015 8:45 am
Posts: 180
Thank you, Greg. IIRC, you were in the seat discussions both here and on the IT forums - I do not want to start rehashing all of that. :-[...

That Racetech seat looks nice - comparing sizes now...

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Bill H
92 Saturn SL2 - SCCA F-Production


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 Post subject: Re: Seat Mounting Rules
PostPosted: Sat Dec 28, 2019 7:34 am 
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Joined: Mon Oct 14, 2002 6:08 pm
Posts: 682
Location: Raleigh, NC
Dick:

I'd like to see that video as well. Many, many years ago I was out at Buttonwillow, when a 510 went into the tire barrier. Upon impact, the cage itself started to tear loose from the floor of the car. One of the reasons I completely rebuilt the floors and sills of my MGB.

Rick

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#27 FP Miata


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 Post subject: Re: Seat Mounting Rules
PostPosted: Sat Dec 28, 2019 9:26 am 
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Joined: Mon Oct 26, 2009 1:45 pm
Posts: 230
[urlhttps://www.facebook.com/chperezn/videos/pcb.2402860526698173/2457351107869738/?type=3&theater&ifg=1][/url]

I found it, although it is more concerning seat belt anchoring. In the video, it appears that the seat stays fixed. Nonetheless, this video does give some insight into the dynamics involved in a crash. I'm also interested in the reasons the engineers had for saying the backrest mount was dangerous.

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Dick Gagliardi
Chicago region
H Production VW Scirocco


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 Post subject: Re: Seat Mounting Rules
PostPosted: Sat Dec 28, 2019 9:48 am 
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Joined: Sun Dec 14, 2014 11:06 pm
Posts: 123
Location: Portland, OR
That same video went around as “counterfeit racing harness”.

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Ian
FP CRX Si


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 Post subject: Re: Seat Mounting Rules
PostPosted: Sat Dec 28, 2019 11:53 am 
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Joined: Tue Dec 31, 2013 10:40 am
Posts: 406
Location: Huntsville, AL
Should have wrapped the harnesses around the bar instead of relying on the hook tabs at the shoulder straps.

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Brett W
Huntsville, AL


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 Post subject: Re: Seat Mounting Rules
PostPosted: Sun Dec 29, 2019 6:27 am 
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Joined: Sun Aug 18, 2002 6:52 pm
Posts: 2195
Location: Topeka, Kansas
Now that I have one, I'll never not have a racetech seat. Super comfortable.

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jesseprathermotorsports.com


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