SM_ATL's Carrera S Journal
Probably a few bolt on essentials, but still TBD
I am trying to find a solution to avoid to install a rollbar and replace the seats (I love the 18-ways with adjustable bolster) for the occasional track use. Definitely need something that will be more effective than the 3-points seatbelt. I'll start a quick thread to exchange ideas on this topic...
I am trying to find a solution to avoid to install a rollbar and replace the seats (I love the 18-ways with adjustable bolster) for the occasional track use. Definitely need something that will be more effective than the 3-points seatbelt. I'll start a quick thread to exchange ideas on this topic...
Thanks! The car is at Hennessy in Roswell, GA.
Registered User
Joined: Dec 2012
Posts: 94
From: Chicago
Rep Power: 21
Wow, what a great thread! Wish I'd known a lot of this stuff earlier!!
Just had Suncoast install the X51 powerkit, and at the same time had them try the GT2 seats ... but they claimed they don't work in the 991 given the airbag not being compatible. Seems like you figured this out?
A couple of questions --
1) For your track wheels with R888s, what tire sizes did you go with? Looks like the closest would be 235/35/19 and 295/30/19, but that would mean a smaller wheel diameter vs OEM ... If I calculated it right, the front diameter would be 64.7cm vs 68cm OEM, and rear 66cm vs. 68.5. In other words, the car will sit 16mm lower in the front, and 13mm in the rear. Does that not mess with the sensors for traction control & PDCC?
2) Is getting the Fabspeed headers worth it? Their dyno graphs are a bit disappointing, may need to combine with a software upgrade, e.g., when GIAC comes out? What do folks think?
Thanks
Tom
__________________________________________________ _____
2013 Platinum Silver 991s
Aerokit Cup, X51 Powerkit, PDK, PSE, PASM & PDCC, Sport Chrono, Adaptive power seats, Sprt Design Steering Wheel, Bose, Stainless Steel brake lines, clear bra
Just had Suncoast install the X51 powerkit, and at the same time had them try the GT2 seats ... but they claimed they don't work in the 991 given the airbag not being compatible. Seems like you figured this out?
A couple of questions --
1) For your track wheels with R888s, what tire sizes did you go with? Looks like the closest would be 235/35/19 and 295/30/19, but that would mean a smaller wheel diameter vs OEM ... If I calculated it right, the front diameter would be 64.7cm vs 68cm OEM, and rear 66cm vs. 68.5. In other words, the car will sit 16mm lower in the front, and 13mm in the rear. Does that not mess with the sensors for traction control & PDCC?
2) Is getting the Fabspeed headers worth it? Their dyno graphs are a bit disappointing, may need to combine with a software upgrade, e.g., when GIAC comes out? What do folks think?
Thanks
Tom
__________________________________________________ _____
2013 Platinum Silver 991s
Aerokit Cup, X51 Powerkit, PDK, PSE, PASM & PDCC, Sport Chrono, Adaptive power seats, Sprt Design Steering Wheel, Bose, Stainless Steel brake lines, clear bra
Wow, what a great thread! Wish I'd known a lot of this stuff earlier!!
Just had Suncoast install the X51 powerkit, and at the same time had them try the GT2 seats ... but they claimed they don't work in the 991 given the airbag not being compatible. Seems like you figured this out?
A couple of questions --
1) For your track wheels with R888s, what tire sizes did you go with? Looks like the closest would be 235/35/19 and 295/30/19, but that would mean a smaller wheel diameter vs OEM ... If I calculated it right, the front diameter would be 64.7cm vs 68cm OEM, and rear 66cm vs. 68.5. In other words, the car will sit 16mm lower in the front, and 13mm in the rear. Does that not mess with the sensors for traction control & PDCC?
2) Is getting the Fabspeed headers worth it? Their dyno graphs are a bit disappointing, may need to combine with a software upgrade, e.g., when GIAC comes out? What do folks think?
Thanks
Tom
__________________________________________________ _____
2013 Platinum Silver 991s
Aerokit Cup, X51 Powerkit, PDK, PSE, PASM & PDCC, Sport Chrono, Adaptive power seats, Sprt Design Steering Wheel, Bose, Stainless Steel brake lines, clear bra
Just had Suncoast install the X51 powerkit, and at the same time had them try the GT2 seats ... but they claimed they don't work in the 991 given the airbag not being compatible. Seems like you figured this out?
A couple of questions --
1) For your track wheels with R888s, what tire sizes did you go with? Looks like the closest would be 235/35/19 and 295/30/19, but that would mean a smaller wheel diameter vs OEM ... If I calculated it right, the front diameter would be 64.7cm vs 68cm OEM, and rear 66cm vs. 68.5. In other words, the car will sit 16mm lower in the front, and 13mm in the rear. Does that not mess with the sensors for traction control & PDCC?
2) Is getting the Fabspeed headers worth it? Their dyno graphs are a bit disappointing, may need to combine with a software upgrade, e.g., when GIAC comes out? What do folks think?
Thanks
Tom
__________________________________________________ _____
2013 Platinum Silver 991s
Aerokit Cup, X51 Powerkit, PDK, PSE, PASM & PDCC, Sport Chrono, Adaptive power seats, Sprt Design Steering Wheel, Bose, Stainless Steel brake lines, clear bra
I am eager to hear about the X51 powerkit!!!
A few answers to your questions:
-the GT2 seats "work" (meaning the fit well inside the car) BUT the electrical harness is not 100% the same so indeed you get weight sensor issues that show an airbag error in the dash. We have not resolved this yet (design a proper connector). My belief is that all airbags -except for the seats airbags- would still work.
-You are correct about the sizes of the R888. Idid not have any issues with the previous 991 that did not have PDCC. I do not think PDCC would be more problematic. I'll know more next Friday at the track.
-The Fabspeed headers + sportscats sounded better and made the car feel a bit more responsive. I felt is was a worthwile investment. I do not know what would happen when combine with the X51 kit, or if you would even get a specific tune for the X51 kit any time soon.
Hope this helps!
Serge
Registered User
Joined: Jan 2009
Posts: 594
From: Milwaukee
Rep Power: 54
Love the car. I am just up in Milwaukee. Will be headed up to Road America this summer. Hope you can make it. I was the only 991 out last year. The car in stock form crushes everything.
Question about your stainless steel brake lines. Where did you get them? I would like a better feel on the brake pedal. Do not want to do a big brake kit.
Marc