achtung6

True.....but normal mode with PSE on is not so bad and the memory module will enable that.

spdracerut

With the 991.2 generation Carrera being turbocharged, it responds well to high flow cats. Any turbo car will make significantly more power with high flow cats; anything from the 1.5L turbo in the Civic to the twin-turbo V8 in McLarens. With respect to headers, the factory 991.2 headers are close to the worst design possible which leaves a lot of room for improvement; Porsche ditched the design for the 992. The 3 major brands of headers available for the 991.2 Carrera have all been tested on various cars in various states of mods and tunes on various dynos, but they all show significant gains. Of course, the different brands perform a bit differently due to design differences, but they have shown 4%-7% gains, so 20-25whp give or take. Plus, they improve boost response.

This is just one test of multiple that have been done.
https://motoiq.com/testing-vektor-pe...911-carrera/8/

SeeForce

I believe it says, "at engine RPM" and then shows 6.42 for HP (6420) and 4.51 for torque (4510) which seems to match the graph for each measured peak.

rubycaymanr

I am not an engineer but that was the information conveyed by the tuner. If that was inaccurate I suppose I should be corrected

Robert Linton

There are three types of horsepower, tuner horsepower, psychic horsepower and real horsepower. The latter tends to be the smallest.

luv2sleep

IXLR8

Well I doubt the engine HP is 570 as stated.

So what mods did you do or did I miss that?

rubycaymanr

The mods; Kline equal length headers, Agency Power catless exhaust, AMS Innercoolers, IPD PLenum, BMC Air Filter and Hydra Motor Works retuned the ECM

RDH

Ok...that was funny

Hydra Motor Works

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!

SeeForce

Tunes are so amazing. You say 100hp/100tq for a base 991.2. That is nuts. Just figure out how to make a tune undetectable and i'll be the first person in line!

Hydra Motor Works

Sending you a PM now!

PCA1983

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.

TXGold

IXLR8

By a tune, I take it "most" of the power gain from any one device was the ECU and not so much from the individual components you listed (well maybe the intercoolers). I take it boost was increased.