[peaedvard]

Just tuned my GTS at this company in norway https://www.tsracing.no/chiptuning/ it did take 2hours and they used an adapter connected to the ECU.
boost was increased with 0,4 bars and the car feels realy strong, mostly in the mid range where the torque kicks in
The acceleration from 100 km/h is overwhelming
The only disadvantege is the 1000 dollar speeding ticket in Norway

This is how the car should have been delivered from factory...

 

[ZuffenHouseRules]

Interesting, their Stage 1 tune-only flash adds huge torque but only modest horsepower gains. I wonder it that reflects the tuner's preferred profile (for driveability over peak performance?) or something inherent to the 2.5/VTG hardware...

Still, impressive for software-only flash. Enjoy, avoid those tickets!

The Seimens ECU in the new-generation 9A2Bx turbo engines (911 and 718) has been cracked and we're starting to see flashes from multiple tuners. PorscheBoost.com reports a tune-only flash gaining 90 rwhp on the 3.0 Carrera base. That's rated quite close to our 2.5 and actually delivers near-identical performance stock, so a hopeful indicator of big potential gains for our coming 718 flashes.

 

[ZuffenHouseRules]

Here's the jpeg dyno chart

MODERATOR'S NOTE: As of 6/4, attachments can't be opened on the forum. Site admins are working on a solution.

 

[[email protected]]

The modest hp gains probably have more to do with the turbo size and not being able to move the needed volume of air at higher RPMs to make big hp.

Interesting, their Stage 1 tune-only flash adds huge torque but only modest horsepower gains. I wonder it that reflects the tuner's preferred profile (for driveability over peak performance?) or something inherent to the 2.5/VTG hardware...

Still, impressive for software-only flash. Enjoy, avoid those tickets!

The Seimens ECU in the new-generation 9A2Bx turbo engines (911 and 718) has been cracked and we're starting to see flashes from multiple tuners. PorscheBoost.com reports a tune-only flash gaining 90 rwhp on the 3.0 Carrera base. That's rated quite close to our 2.5 and actually delivers near-identical performance stock, so a hopeful indicator of big potential gains for our coming 718 flashes.

 

[ZuffenHouseRules]

The modest hp gains probably have more to do with the turbo size and not being able to move the needed volume of air at higher RPMs to make big hp.

That seems logical, except that the single big VTG blower has much larger compressor wheel than the small twins on base 991.2 (although they're each blowing one bank with less swept-area than the four). Not sure how much that matters but I've gleaned that propensity for lag aside, one big turbo often seen as preferred to twins for max. performance.

Anyway fingers-crossed that our VTG turbo inheritance from the 911 Turbo/GT2 proves to be an advantage for tuning. Not that I *need* more power myself, just love the thought of a swarm of flashed 718s driving around with 440 n/a-equivalent horsepower sowing consternation among pre-turbo 911s....

 

[[email protected]]

That seems logical, except that the single big VTG blower has much larger compressor wheel than the small twins on base 991.2 (although they're each blowing one bank with less swept-area than the four). Not sure how much that matters but I've gleaned that propensity for lag aside, one big turbo often seen as preferred to twins for max. performance.

Anyway fingers-crossed that our VTG turbo inheritance from the 911 Turbo/GT2 proves to be an advantage for tuning....I love the thought of a bunch of flashed 718s driving around with 440 n/a-equivalent horsepower sowing consternation among pre-turbo 911s....

Yeah, 20+ years of dealing with OEM turbos has shown me they almost never move enough air up top. OEMs want drivability and use smaller turbos (single or twin) to get the low end torque and avoid lag. When we're building turbo systems the choice of single vs twin almost always comes down to packaging. In the end you're rarely going to get OEM low end grunt with a turbo that has big top end. The variable geometry turbos help though

 

[peaedvard]

It would probably be a good Idea to change the downpipes and remove the cats, that would change the powerband ,a little less torque in the mid range and more power on top.
But I am not complaining about the power increase it is even more fun to drive now..
This company is being used by many tuners In Europe some interesting reading.

 

[peaedvard]

Here is another flash company: Flashtec

 

[[email protected]]

It would probably be a good Idea to change the downpipes and remove the cats, that would change the powerband ,a little less torque in the mid range and more power on top.
But I am not complaining about the power increase it is even more fun to drive now..
This company is being used by many tuners In Europe some interesting reading.
https://www.dyno-chiptuningfiles.com/?gclid=EAIaIQobChMIkrmImbK02wIVyuAYCh1hKg4yEAAYASAAEgJIufD_BwE

Those mods are going to make MORE mid-range torque and probably the same top end power. The turbo is likely tapped out up top. I need to get one on the dyno once the Access Port is out to say for sure but I'd be willing to bet this is the case.

 

[ZuffenHouseRules]

Guess we'll see soon enough. I'm still looking for big top-end gains with the 2.5/VTG. That turbo unit has 67/55 wheels (compressor/turbine, in mm) in the 718 GTS compared to 49/45 for the base 3.0 Carrera twin turbos. A 67mm compressor is 911 Turbo S/GT2 territory...

The 2.5 also has that 102mm big bore (versus 91mm on the 2.0 and 3.0 9A2 turbos). Same as the 911 Turbo and all those high-revving n/a 3.8s incl. last GT3). Plus a high-revving flat-plane crankshaft like the 919. And more efficient (I think?) air-to-water intercooling. How much does any/all of this matter for tuning potential? I don't know.

 

[ZuffenHouseRules]

Here's the post w/ dyno chart on Bren Tuning achieving +77whp with a tune-only flash of the 9A2B6 in the 991.2 base 911 Carrera. To remind some readers, that's the factory-rated 370hp 3.0 six-cylinder version of 'new' modular turbo engine architecture shared by our 9A2B4 (but with larger bore and larger VTG turbo in the 718 S/GTS).

https://www.porscheboost.com/conten...-dyno-tune-results-with-AMS-air-filter-87-whp

Bren Tuning states:
"These models use a newer turbo motor with tons of untapped potential when they came out. But New SD21x (ECU) management held a lot of tuners back. A factory stock car picking up 130tq midrange and 90hp with no parts is nothing short of amazing. Careful changes were made to launch control, throttle response, mixtures, and torque models to transform this into two different vehicles. "