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Roll Cage Failures

SLOWPOKE693 said:
I run a Corbeau(sp) hard shell seat in my race car and it has a bolt hole molded in to mount the back of the seat to the harness bar, and it's used in my car. I also tighten the living fuck out of my belts over and over right up until the green flag drops, but I'm guilty of not wearing a head/neck restraint. I need to pick one up this winter.....
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And in circle stuff you pull them tight every caution. I don't know how they loosen soo much.
 
SLOWPOKE693 said:
I run a Corbeau(sp) hard shell seat in my race car and it has a bolt hole molded in to mount the back of the seat to the harness bar, and it's used in my car. I also tighten the living fuck out of my belts over and over right up until the green flag drops, but I'm guilty of not wearing a head/neck restraint. I need to pick one up this winter.....
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Please do... we don't need to read a story about how you're paralyzed:frown:
 
Tizken said:
And in circle stuff you pull them tight every caution. I don't know how they loosen soo much.
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I think it's because your body heat is syncing with the belts. The warmer they get, the more the belts loosen.
Also, Have you ever put a pair of pants on in the morning before work and by 10 am you're wishing you put a belt on even though you didn't need one when you put the pants on? I think there could be a few factors here that correlate. Over the course of a given time your body is exhausting gssses and heating up, so naturally you lose a little size as well as your body heating the belts to expand them a tiny amount. I believe these things to cause small changes that are very noticeable during a rigorous activity.
 
SLOWPOKE693 said:
I run a Corbeau(sp) hard shell seat in my race car and it has a bolt hole molded in to mount the back of the seat to the harness bar, and it's used in my car. I also tighten the living fuck out of my belts over and over right up until the green flag drops, but I'm guilty of not wearing a head/neck restraint. I need to pick one up this winter.....
Click to expand...
Highly recommend the original: HANS. Other than getting in/out (have to have your helmet on prior to getting in), hardly notice it.
 
Sterlingfire said:
I think it's because your body heat is syncing with the belts. The warmer they get, the more the belts loosen.
Also, Have you ever put a pair of pants on in the morning before work and by 10 am you're wishing you put a belt on even though you didn't need one when you put the pants on? I think there could be a few factors here that correlate. Over the course of a given time your body is exhausting gssses and heating up, so naturally you lose a little size as well as your body heating the belts to expand them a tiny amount. I believe these things to cause small changes that are very noticeable during a rigorous activity.
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Seat padding compressing was always my guess.
 
Bebop said:
Sparco says you shouldn't do that because it impacts how the seat is designed to flex during impact.

No WRC car or DTM or whatever other top racing vehicle has a hard shell seat that has a bolt back rest.

Seat choice has an impact on your statement.
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First statement and last statement I agree with, follow what seat manufacturer recommends.


Middle statement is absolutely false. One of the arguably safest seats ever put in a sportscar (and by sports car I mean racecar), the Audi designed PS2 is a carbon shell seat that is fixed bolted to the chassis on the bottom (8 M8 bolts), with no slider mounts because they can fail more easily than a fixed mount. And then the seat is bolted through the cage with 2 M10 bolts through the harness bar. It's this set-up in the Audi R8 GT3, GT4 and Lamborghini Huracan GT3.


If anyone is interested I can share some pictures of the FIA homologated cages from some different GT3/GT4 cars, may spark some good ideas for guys building cages at home.
 
Nvr-enough said:
If anyone is interested I can share some pictures of the FIA homologated cages from some different GT3/GT4 cars, may spark some good ideas for guys building cages at home.
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Fuck yeah, learn me some shit !

Talking about this guy ?

zupr81.jpg


audi_motorsport-110722-3876.jpg


A special feature in the Audi R8 LMS, which competes at Spa, is an innovative seat system that has already proven its value during the 24-hour race at the Nürburgring. It is the follow-up model to the seat system previously manufactured by suppliers. A modular manufacturing concept facilitates manufacture with far greater possibilities for individualization. While the conventional seat shells of specialist suppliers were previously designed to a standard width, Audi can now offer and manufacture different seat widths. As a result, internationally active R8 LMS drivers can now make a selection perfectly adapted to suit their needs.


The seat is manufactured entirely from carbon-fiber, has a dual shell construction and therefore complies with the most demanding load criteria. Since the installation height of the seat allows the driver position to be lowered by around 60 mm the car’s center of gravity also benefits from the new solution. This new seat system will be available in the future to all Audi Sport customer racing teams.
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What alternative do you have that's commercially available ?

Edit :

If I was smarter, I would have looked at FIA 8862-2009
Some of the options actually bolt to the cage :

Racetech RT9129HRW Racing Seat - Racetech Seats USA

Surpassing the stringent demands of the FIA 8862-2009 standard, the 129 series is Racetech’s no compromise pro-motorsport seat. Adept at cradling Bathurst winners and most of the V8 supercar competition, there is none better when it comes to comfort and s
racetech-usa.com racetech-usa.com

RT9129HRW-016R(sml)-800x800.jpg
 
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Bebop said:
Fuck yeah, learn me some shit !

Talking about this guy ?

zupr81.jpg


audi_motorsport-110722-3876.jpg




What alternative do you have that's commercially available ?

Edit :

If I was smarter, I would have looked at FIA 8862-2009
Some of the options actually bolt to the cage :

Racetech RT9129HRW Racing Seat - Racetech Seats USA

Surpassing the stringent demands of the FIA 8862-2009 standard, the 129 series is Racetech’s no compromise pro-motorsport seat. Adept at cradling Bathurst winners and most of the V8 supercar competition, there is none better when it comes to comfort and s
racetech-usa.com racetech-usa.com

RT9129HRW-016R(sml)-800x800.jpg
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I bet that seat costs more than my entire race car. :laughing:
 
Bebop said:
Ratchet seat belts are the answer.
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late to the conversation. but ....

just make sure the belts you use are legal with the sanctioning body you run under.

None of the road racing series I run with allow ratchet seat belts. I have not looked at a set closely, do any carry SFI or FIA tags?

When I sat in the crazy seat in rally cars, and the HANS was new, I came home from several events just black and blue in bruises. The Simpson seat belt pads definitely helped, but again not legal with most of the sanctioning bodies I race with
 
XtremeJ said:
late to the conversation. but ....

just make sure the belts you use are legal with the sanctioning body you run under.

None of the road racing series I run with allow ratchet seat belts. I have not looked at a set closely, do any carry SFI or FIA tags?
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Mine are SFI tagged.
And have pads haha

I use Crw harnesses because it's a small family business and I got great support when ordering custom stuff. They were super nice to deal with.
 
Sprint car guys will hope that their cars roll to dissipate energy. It is the sudden stops that hurt them the most. And those stops can be from any direction. Not just frontal.
 
Russellmn said:
I've got the "cheaper" version of this from RaceTech, still cost almost $2k to get to my garage. AMAZINGLY comfortable! If they weren't so damned expensive I'd buy a couple for my Lizard. Have to settle for my PRPs for now though.
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Spending money on safety gear is never a bad investment in a race application. I’ve definitely gotten better about it since I was younger with no regrets after a few really nasty crashes in good gear that has paid for itself since I now realize that the body doesn’t always heal as good as new. Carbon fiber seats, a carbon Bell GTX3 and modern head and neck support devices have all made it into my stuff over the last decade.
 
SLOWPOKE693 said:
I run a Corbeau(sp) hard shell seat in my race car and it has a bolt hole molded in to mount the back of the seat to the harness bar, and it's used in my car. I also tighten the living fuck out of my belts over and over right up until the green flag drops, but I'm guilty of not wearing a head/neck restraint. I need to pick one up this winter.....
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I have 4 sitting on the shelf. Pm me
 
Putting this here. Need some advice on tubes for my back half. While I won't have a back seat rider for "extreme" obstacles I know that shit happens when you least expect it.

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X-brace behind the front seats should go to the upper corners. Same behind the back seat.

Other than that, there's a lot of injury/death around that back seat feller with just air to protect them: driveshaft failure, resting an arm on the shock tower and getting pinched, shock tower eventually tearing off and making his day.
 
Rockwood said:
X-brace behind the front seats should go to the upper corners. Same behind the back seat.

Other than that, there's a lot of injury/death around that back seat feller with just air to protect them: driveshaft failure, resting an arm on the shock tower and getting pinched, shock tower eventually tearing off and making his day.
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It's getting skins and thick sheet around the back after I get all the tubing figured out
 
My opinion, for what it isnt worth, that shock mount needs to go under the shock hoop rather than on the side. I would much rather have my shock mount (double shear or not) in compression rather than under shear and bending forces lateral to the mounting surface. My mind breaks that mount and sends it right into the passenger area.
 
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