At least 6 choices for 991GT3RS Roll bar
#61
Too bad the OEM cage requires welding / drilling for the OEM receiving plates on the frame for the front section, as well as new cosmetic interior trim panels that are recessed to clear the rear bar legs ($$).
#62
There is an issue of the steel that is available: most use chromoly steel-strong and light but potentially brittle-especially at the weld zones and post weld stress relief is needed-that is why there are not used in race cages-you can’t really heat treat the whole car. The alternative material DOM is supposedly more resilient and less prone to stress failure.
So if we eliminate the Cromoly steel cages we are left with Cantrell, CMS and Alexshop. I may have missed others but this is what I found.
Of these three I eliminated the Cantrell and the CMS Bar because they are multipiece .That leaves the Alex bar which is one piece welded from DOM and has the horizontal attachment closer to the seats keeping the belt length as short as possible.
Ok, thanks for reading to the end-anyone feel free to dispute or chin in. Also if you have an Alex bar let me know how you like it and post a pic of the view through the rear view mirror-thanks!
So if we eliminate the Cromoly steel cages we are left with Cantrell, CMS and Alexshop. I may have missed others but this is what I found.
Of these three I eliminated the Cantrell and the CMS Bar because they are multipiece .That leaves the Alex bar which is one piece welded from DOM and has the horizontal attachment closer to the seats keeping the belt length as short as possible.
Ok, thanks for reading to the end-anyone feel free to dispute or chin in. Also if you have an Alex bar let me know how you like it and post a pic of the view through the rear view mirror-thanks!
You're right that DOM is more "forgiving" and suffers less weld-embrittlement than 4130, which is why a lot of chassis builders will use DOM in the roll cage of an otherwise-4130 chassis. We did the same in building full racing chassis until switching to Docol gave us the best of both worlds. Not trying to sway your decision, just giving you some info to consider. (When you add up materials, custom powder coating, and free shipping, I will admit we're trying to make it hard to choose another product!)
#63
Instructor
And I believe you can't buy them from Porsche (or Porsche Motorsport) anyway. Only if you own a CUP car ?
#64
Basic Sponsor
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Here is a beautiful 2018+ Sapphire Blue 991 GT3 with Color Matched BBi StreetCup Roll Bar Installed at SP Motorsport
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About SP Motorsports
1840 National Avenue
Hayward, CA, 94545 US
Phone: 510.782.0188
Fax: 510.785.8735
Email: info@spmsracing.com
Web Site: www.spmsracing.com
Facebook: www.facebook.com/spmsracing
- Jerry@BBiAutosport.com
Attachment 1351187
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About SP Motorsports
1840 National Avenue
Hayward, CA, 94545 US
Phone: 510.782.0188
Fax: 510.785.8735
Email: info@spmsracing.com
Web Site: www.spmsracing.com
Facebook: www.facebook.com/spmsracing
- Jerry@BBiAutosport.com
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Bringing Passion, Artistry, Craft to the Porsche Tuning Industry
Southern California's Porsche Performance Tuning, Engine Development,
ECU Software Tuning, Custom Fabrication, Race Preparation & Factory Service Center
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Follow Us On: Facebook & Instagram
#65
Rennlist Member
anyone in the Bay Area have the Schroth Porsche-specific carbon bucket 4pt belts with a bar that I can inspect- happy to meet most anywhere and buy you lunch for your troubles - if possible I'm going to be at thunderhill this weekend w/PCA Diablo and GGR - so if you're there come find me.
I'm thinking the following setup for my '18 GT3
GMG LMS Bar
6 points Hans compatible for driver seat
4 point Schroth for passenger seat - passenger seat gets used so rarely seems a reasonable compromise
any comments or concerns?
will the 4 point Schroth work with HANS - should I happen to have an instructor in the seat w/HANS?
thanks all!
I'm thinking the following setup for my '18 GT3
GMG LMS Bar
6 points Hans compatible for driver seat
4 point Schroth for passenger seat - passenger seat gets used so rarely seems a reasonable compromise
any comments or concerns?
will the 4 point Schroth work with HANS - should I happen to have an instructor in the seat w/HANS?
thanks all!
#67
Pro
I’ve gone through your same logic sequence myself and come to the conclusion that I think I just want harness mounting, not a pseudo roll bar. Since nobody offers such a thing for the 991, I plan to get one custom fabricated that attaches to the same rear shelf mounting points as most of the pseudo roll bars.
My goal (which appears achievable) is minor slot cutting to the opener rear generic 991 carpet over the engine area for belt pass through, and zero mods to the seat shelf carpet with the GT3 stitching.
If I break down and get a pseudo roll bar out of laziness, I like the custom layout BBi bars the best (love the curved main hoop, that is slick).
#69
Pro
#70
I will definitely have one made one for me, and I will put you guys in contact with the fabricator once done to have additional ones made for you.
My car arrives late April, so just give me until mid May. I’m motivated to get it done before my break-in miles are over so I can get to the track!
My car arrives late April, so just give me until mid May. I’m motivated to get it done before my break-in miles are over so I can get to the track!
Last edited by Mech33; 03-23-2018 at 12:25 AM.
#71
Pro
I will definitely have one made one for me, answer I will put you guys I contact with the fabricator once done to have additional ones made for you.
My car arrives late April, so just give me until mid May. I’m motivated to get it done before my break-in miles are over so I can get to the track!
#72
Basic Sponsor
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Here is a brand new Chalk Porsche 991.2 GT3 with a BBi Roll Bar installed at Alekshop
Attachment 1351009
Upgrades
Safety Package
• BBi Autosport StreetCup Roll Bar Custom Painted in Chalk
• BBi Autosport Sub Belt Bar
• Schroth Racing Profi II GT3 HANS Harnesses
Bar Installed
Attachment 1351011
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Completed Project
Attachment 1351010
About Alekshop
Attachment 1335469
Shop Address:
4390 Technology Drive
Fremont, CA 94538
Get Driving Directions
Phone Number:
(925) 609-4559
Links:
www.alekshop.com
www.facebook.com/alekshop/
www.instagram.com/alekshop_com
- Jerry@BBiAutosport.com
Attachment 1351009
Upgrades
Safety Package
• BBi Autosport StreetCup Roll Bar Custom Painted in Chalk
• BBi Autosport Sub Belt Bar
• Schroth Racing Profi II GT3 HANS Harnesses
Bar Installed
Attachment 1351011
Attachment 1351012
Completed Project
Attachment 1351010
About Alekshop
Attachment 1335469
Shop Address:
4390 Technology Drive
Fremont, CA 94538
Get Driving Directions
Phone Number:
(925) 609-4559
Links:
www.alekshop.com
www.facebook.com/alekshop/
www.instagram.com/alekshop_com
- Jerry@BBiAutosport.com
#73
Pro
Alright guys, I've had a couple people IM me for the harness bar setup that I posted above (just clean straight across one bar).
My car will go into the fabricator's on May 8th... please send me a PM if you are interested in getting one of these and I'll add you to the list.
Best Regards,
Dave
My car will go into the fabricator's on May 8th... please send me a PM if you are interested in getting one of these and I'll add you to the list.
Best Regards,
Dave
#75
Basic Sponsor
Rennlist
Site Sponsor
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Our partners at IND Distribution in Lake Zurich Illinois were able to get our WEC bar into the hands of a lucky 2RS owner this week. Doesn't it just look right at home?!
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