GT3/GT2 Performance and Track Discussion on the Porsche GT3 and GT2

Sport bucket seats and roll bars

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Old Aug 9, 2008 | 02:47 AM
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Sport bucket seats and roll bars

I just got a GT3RS and I'm planning on installing a roll bar and the sport seats. Has anyone have any advice or pictures. I hear the Porsche roll bar has issues with seat not being able to be extended all the way back and not acceptable for all type racing events. The bolt together roll bar looks wierd also. Any advice would be appreciated.
 
Old Aug 9, 2008 | 09:10 PM
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OEM RS roll bar will transform your car it is a must IMHO
You will not be able to put ANYTHING bejind the seats.
 

Last edited by luiscarlos; Aug 10, 2008 at 03:03 PM.
Old Aug 9, 2008 | 10:55 PM
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get one from GMG much better
 
Old Aug 10, 2008 | 03:15 AM
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The GMG roll bar does look good on the web site. Do you know of anyone who has installed it? how dificult the installations is?
 
Old Aug 10, 2008 | 06:54 AM
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I would recommend either the Porsche OEM half-cage (rear) or maybe the Oakley Design carbon fiber cage.

-Gerry

07 GT3 RS Clubsport
 
Old Aug 10, 2008 | 03:05 PM
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oem rs is best..
 
Old Aug 10, 2008 | 06:09 PM
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Thought these may help...

OEM RS cage


OEM club sport cage


If you are tall and worried about putting you seat back far enough, I would probably consider a custom made cage... I had the same issue and had one made by Speedware Motorsports -- all bolt in, 6 point
Mine looks like this:


Here is a shot with the seats (Recaro Profi XL SPG)




Also check out the sweet RS Sparco DTM seats that are posted in this section and the for sale section I believe...

Good Luck
 
Old Aug 11, 2008 | 11:14 AM
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OEM RS rollbars and 2nd consider the Dazzsport rollbars. These two bolt on to the rear suspension points. Marked increased structural rigidity. Other bars do not do this.
The Oakley rollcage in CF may as well be a million $. Insanely expensive and after looking at it, where do you fasten the shoulder harness?

Regarding seats the Porsche RS clubsport are great but price is crazy.
Recommend the Sparco DTM CF seats. Get them from Speedware and with the proper brackets. Awesome seats. See the thread currently about the seats. What color is your GT3RS?

Good luck
Ranger
 
Old Aug 11, 2008 | 11:24 AM
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GT3 Ranger is correct only get bars that attach to the rear shock towers like RS OEM or Dazzsport.
Apart of the structural rigidity which is the most important other bars look terrible if you see the car lateral because they att to the rear seat belt points (ex.Tequipment) and the ones that att to the rear shock towers look super racy.
 
Old Aug 11, 2008 | 12:28 PM
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This has been discussed at length over on RL. It depends what you want to do, how much you want to spend for your safety, etc, etc...

Essentially the BEST option is a custom half cage bolted to box sections welded to the chassis. Like this custom half from TC Design.


Otherwise, its always a compromise as every bar has its 'weak' points.

The TE bar, while crashed tested by PAG, bolts to the seat belt points but this causes pressure to be in sheer rather than compression. And while the bolts that fasten the bar in are rated to ~22,000 lbs of sheering force apparently that amount of force is easy generated in a roll.

The RS bar is very pricey but its a great design. The problem with the RS half cage comes with the bolt in plate welded to the ends of the main hoop. They are too small and would go right through the floor. In order for this bar to function at full potential it must be bolted to box sections welded to the chassis.

The DAS bar while extremely cost effective has several "weak" points. Its fabricated from (mild?) steel (helping to keep costs low) instead of Chrom Moly which makes it very heavy. Additionally there is no cross member in the main hoop and rear kickers dont attach to the axial joints in the main hoop causing more stress to be exerted on the already "flawed" main hoop in a (God forbid) roll over situation.

Another option would be GMG's new harness bar. It employs a proper X in the main hoop and I actually have a custom design which connects to the rear shock towers (for a total of 6 mounting points) allowing for even more protection and structural rigidity. I'll post pics later today. Again the only "weak" point in this set up are the bolts (same as TE grade 8 or 9?) which fasten the bar to the seat belt points. Although i believe the rear mounting points (non shock tower) are designed a little differently from that of the TE bar. GMG employs a more cylindrical end to spread sheer forces (See photos below)

GMG bar


TE Bar



But again PAG designed and tested the TE bar to fasten to the seat belt points solely b/c they are the strongest points of the car and most likely forces will always be exerted in ways other than sheer. AllanJ over on RL put it like this

Originally Posted by AllanJ
I have a fairly good understanding of physics and a rollover is what we're afraid of, not picking up the car and throwing it on its roof in such a way that the forces on the main hoop are in the perfect direction to shear the bolts.

In a rollover, forces are exerted on the bar in different directions every microsecond. There will be some shearing forces for sure, but you'll mainly get offset forces on the bar which will push against or pull away from the mounting points (which are extremely strong).
Again, something will ALWAYS be better than nothing. Its up to you to decide what's worth it.
 

Last edited by CarNerd; Aug 11, 2008 at 12:45 PM.
Old Aug 11, 2008 | 12:51 PM
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Originally Posted by Tim'sNFS
I just got a GT3RS and I'm planning on installing a roll bar and the sport seats. Has anyone have any advice or pictures. I hear the Porsche roll bar has issues with seat not being able to be extended all the way back and not acceptable for all type racing events. The bolt together roll bar looks wierd also. Any advice would be appreciated.
Sorry i dont know if i addressed these questions. I believe with the design of the RS bar you can move the seats all the way back. If not than very close.

Additionally, the RS bar becomes acceptable to most types of racing ONLY if you have it bolted to box sections which are welded to the chassis. But if you are doing real wheel to wheel racing with groups like POC or SCCA, etc i wouldnt recommend anything short of a FULL cage.
 
Old Aug 11, 2008 | 12:57 PM
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Originally Posted by CarNerd
This has been discussed at length over on RL. It depends what you want to do, how much you want to spend for your safety, etc, etc...

Essentially the BEST option is a custom half cage bolted to box sections welded to the chassis. Like this custom half from TC Design.


Otherwise, its always a compromise as every bar has its 'weak' points.

The TE bar, while crashed tested by PAG, bolts to the seat belt points but this causes pressure to be in sheer rather than compression. And while the bolts that fasten the bar in are rated to ~22,000 lbs of sheering force apparently that amount of force is easy generated in a roll.

The RS bar is very pricey but its a great design. The problem with the RS half cage comes with the bolt in plate welded to the ends of the main hoop. They are too small and would go right through the floor. In order for this bar to function at full potential it must be bolted to box sections welded to the chassis.

The DAS bar while extremely cost effective has several "weak" points. Its fabricated from (mild?) steel (helping to keep costs low) instead of Chrom Moly which makes it very heavy. Additionally there is no cross member in the main hoop and rear kickers dont attach to the axial joints in the main hoop causing more stress to be exerted on the already "flawed" main hoop in a (God forbid) roll over situation.

Another option would be GMG's new harness bar. It employs a proper X in the main hoop and I actually have a custom design which connects to the rear shock towers (for a total of 6 mounting points) allowing for even more protection and structural rigidity. I'll post pics later today. Again the only "weak" point in this set up are the bolts (same as TE grade 8 or 9?) which fasten the bar to the seat belt points. Although i believe the rear mounting points (non shock tower) are designed a little differently from that of the TE bar. GMG employs a more cylindrical end to spread sheer forces (See photos below)

GMG bar


TE Bar



But again PAG designed and tested the TE bar to fasten to the seat belt points solely b/c they are the strongest points of the car and most likely forces will always be exerted in ways other than sheer. AllanJ over on RL put it like this



Again, something will ALWAYS be better than nothing. Its up to you to decide what's worth it.
oh pulezzz, you make it sound like the DAS bar is not going to withstand a rollover, any rollover. have you ever seen one? have you ever installed one of these? have you seen how the joints are connected? sure it can be improved. any bar can be improved depending on a rollover scenario. but don't make it like a DAS bar is weak in every imaginable rollover.
 
Old Aug 11, 2008 | 01:04 PM
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Originally Posted by speedoflight
oh pulezzz, you make it sound like the DAS bar is not going to withstand a rollover, any rollover. have you ever seen one? have you ever installed one of these? have you seen how the joints are connected? sure it can be improved. any bar can be improved depending on a rollover scenario. but don't make it like a DAS bar is weak in every imaginable rollover.
There was no intention of singling out the DAS bar. I clearly pointed out "flaws" in every bar and believe that in most DE roll overs ALL of these bars will offer great support.

Not sure how i made the DAS bar seem weak in every imaginable roll over? Again i simply pointed out the "weak" points as with every other bar.
 
Old Aug 11, 2008 | 01:08 PM
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OEM RS point.
 
Old Aug 11, 2008 | 01:15 PM
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Originally Posted by luiscarlos
OEM RS roll bar will transform your car it is a must IMHO
You will not be able to put ANYTHING bejind the seats.
Can you explain how it will "transform" the car?

Originally Posted by luiscarlos
oem rs is best..
Originally Posted by luiscarlos
OEM RS point.
Ok, i think we all get how much you love the RS bar now.

Originally Posted by luiscarlos
Apart of the structural rigidity which is the most important other bars look terrible if you see the car lateral because they att to the rear seat belt points (ex.Tequipment) and the ones that att to the rear shock towers look super racy.
I'm not sure what you mean here. The other bars look terrible laterally? And yes buying something b/c it looks racy is always a good idea.
 


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