2018 911.2 GTS - where to start mods
Rennlist Member
Joined: Dec 2007
Posts: 486
Likes: 160
From: USA
True.....but normal mode with PSE on is not so bad and the memory module will enable that.
Drifting
Joined: Feb 2016
Posts: 2,101
Likes: 749
If you take the factory exhaust and any aftermarket unit on absolutely equal cars under absolutely equal conditions (i.e., absolutely everything) the likelihood of getting much more than 5 extra HP is minimal. And I would opine that the average driver cannot feel even 10 HP let alone 5.
This is just one test of multiple that have been done.
https://motoiq.com/testing-vektor-pe...911-carrera/8/
Racer
Joined: Nov 2014
Posts: 472
Likes: 88
Three Wheelin'
Joined: Oct 2016
Posts: 2,034
Likes: 986
From: SoCal
Some of us just flat out enjoy tinkering with our cars. Is it a complete waste of our hard earned money? You bet. Heck, why not take a Greyhound bus and stay at Motel 6 on vacation because y’all know they’ll keep the light on for you!? I digress.
Back on point...as many have indicated, the best exhaust mod for the 991.2 GTS is swapping out cats for high flow cats or cat bypass. HP/torque gain isn’t significant enough on the butt dyno but highly recommended for sound enhancement. The best bang for your buck HP/torque gain will result from a stage I tune.
Everyone has an opinion and an a**hole, and I respect that. My personal performance sweet spot will be a stage II tune, when I decide it’s time. For now, I’m going to enjoy the mods that I wasted my hard earned $$ on.
Back on point...as many have indicated, the best exhaust mod for the 991.2 GTS is swapping out cats for high flow cats or cat bypass. HP/torque gain isn’t significant enough on the butt dyno but highly recommended for sound enhancement. The best bang for your buck HP/torque gain will result from a stage I tune.
Everyone has an opinion and an a**hole, and I respect that. My personal performance sweet spot will be a stage II tune, when I decide it’s time. For now, I’m going to enjoy the mods that I wasted my hard earned $$ on.
Rennlist Member
Joined: Sep 2009
Posts: 8,687
Likes: 785
From: Canada & the Alps
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Former Vendor
Joined: Aug 2018
Posts: 121
Likes: 3
From: West Palm Beach, FL
The dyno graph of @rubycaymanr 's GTS is after we did a custom dyno tune on it when it was originally @flsupraguy 's car. That particular GTS has a full catless Agency Power exhaust, Kline headers, BMC filter and AMS intercoolers. The power that car put down is measured at the wheels as well.
As far as best bang for your buck modification you can do to the 991.2's is an ECU tune. Will you get a better sound? No. But in regards to performance, there is no question about it. If you are local, we can unlock your ECU in-house and tune it same day. If you aren't local, upon receiving your ECU, please allow 24-48hrs to unlock and tune, then we will overnight the ECU back to you. The tune includes a handheld device which can be used for flashing back to stock or updated tune maps if you were to add hardware modifications later down the road. This way you do not have to send your ECU back in, we can handle the tuning remotely.
If anyone has any questions, I would love to answer them. Feel free to DM me or give us a call at the shop as well!
As far as best bang for your buck modification you can do to the 991.2's is an ECU tune. Will you get a better sound? No. But in regards to performance, there is no question about it. If you are local, we can unlock your ECU in-house and tune it same day. If you aren't local, upon receiving your ECU, please allow 24-48hrs to unlock and tune, then we will overnight the ECU back to you. The tune includes a handheld device which can be used for flashing back to stock or updated tune maps if you were to add hardware modifications later down the road. This way you do not have to send your ECU back in, we can handle the tuning remotely.
If anyone has any questions, I would love to answer them. Feel free to DM me or give us a call at the shop as well!
Racer
Joined: Nov 2014
Posts: 472
Likes: 88
The dyno graph of @rubycaymanr 's GTS is after we did a custom dyno tune on it when it was originally @flsupraguy 's car. That particular GTS has a full catless Agency Power exhaust, Kline headers, BMC filter and AMS intercoolers. The power that car put down is measured at the wheels as well.
As far as best bang for your buck modification you can do to the 991.2's is an ECU tune. Will you get a better sound? No. But in regards to performance, there is no question about it. If you are local, we can unlock your ECU in-house and tune it same day. If you aren't local, upon receiving your ECU, please allow 24-48hrs to unlock and tune, then we will overnight the ECU back to you. The tune includes a handheld device which can be used for flashing back to stock or updated tune maps if you were to add hardware modifications later down the road. This way you do not have to send your ECU back in, we can handle the tuning remotely.
If anyone has any questions, I would love to answer them. Feel free to DM me or give us a call at the shop as well!
As far as best bang for your buck modification you can do to the 991.2's is an ECU tune. Will you get a better sound? No. But in regards to performance, there is no question about it. If you are local, we can unlock your ECU in-house and tune it same day. If you aren't local, upon receiving your ECU, please allow 24-48hrs to unlock and tune, then we will overnight the ECU back to you. The tune includes a handheld device which can be used for flashing back to stock or updated tune maps if you were to add hardware modifications later down the road. This way you do not have to send your ECU back in, we can handle the tuning remotely.
If anyone has any questions, I would love to answer them. Feel free to DM me or give us a call at the shop as well!
Former Vendor
Joined: Aug 2018
Posts: 121
Likes: 3
From: West Palm Beach, FL
Rennlist Member
Joined: Apr 2014
Posts: 3,051
Likes: 478
From: Orlando burbs
In my mind, first mod is changing out the cats for the sound, if for nothing else. Cat delete pipes are best unless you have environmental gestapo inspecting your emissions. In that case id change my voting habits, and install race cats. 2nd mod would be plenum and air filters. Next up would be a tune but I'm not hurrying into that, with 41 months of factory warranty remaining on my X51 C2S. I'll wait another 3 years till it has at least 15k miles and is beyond that early defect failure probability. At the same time I'll be watching for any reliability issues on the forum and among service shop folks i know. Failures related to tuning don't seem likely at this point, but it will take a few more years to convince me.
Rennlist Member
Joined: Oct 2006
Posts: 332
Likes: 10
From: Houston, TX
I highly recommend calling Todd Knighton at Protomotive and getting a tune from him. His support is awesome and he is legendary in the Porsche world as you may know. I haven’t seen many 60-130 times but the fastest on any stock turbo I’ve seen is a 8.1 I think. I have a 7.4 with only WMI, Catless and Tial inlet pipes and that’s with an MT. Good luck to you and your quest. Enjoy the journey 
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Rennlist Member
Joined: Sep 2009
Posts: 8,687
Likes: 785
From: Canada & the Alps
The dyno graph of @rubycaymanr 's GTS is after we did a custom dyno tune on it when it was originally @flsupraguy 's car. That particular GTS has a full catless Agency Power exhaust, Kline headers, BMC filter and AMS intercoolers. The power that car put down is measured at the wheels as well.