can anyone chime in on which tune makes more power? TQ HP etc...and drivability...im aware the tech art is twice as much?

 

Giac is a true ecu flash and techart is a chip

 

It's not a chip, it's a piggyback tuner (aka a box full of resistors that trick the DME into doing things it doesn't want to do).

OP, if you want a true recalibration with proper safeties intact, GIAC is your only option. Add in the fact that we offer switchable modes (race fuel, valet, stock) and it should be a no brainer.

In terms of power, since you're tricking the DME, typically what you will see is that the car will make close to stock power once it adapts to the piggyback (these cars are torque controlled which you can't get around with a piggyback). Since we're able to adjust these items in the DME to coincide with the power we're looking to make, we will always make more power.

 

Piggyback = false sensor data sent to ECU. Car relies on ECU safeties meant for true sensor data.

 

Not sure what the giac can do ...but all I can tell you is, my buddy has the new 650s spider ...now prior to the techart he couldn't keep up with me until I hit 80mph, then he started to reel me in quickly , after the techart we took the cars upto 160mph late one night ...he was behind me all the way...not by much but I pulled away a little in every gear...

I'm very happy with the techart ..plus the backing of the 2 year warranty and undetectable by Porsche is a big bonus...

Personally I couldn't careless how the gain is achieved...just the end result...all the "our system is better than yours" is irrelevant.. More important is the back up from the installer and I believe techart are a very reputable tuner..but I am in Europe and we do not have as many options for tuners as you guys over the pond..

 

There really isn't much comparison between a true ECU remap and a piggyback unit. While one is actually writing new code to improve performance inside the ECU (as the factory intended), the other is working solely on the outside of the ECU to essentially trick it into working outside its safety zone.

The amount of knowledge and development that goes into a true software upgrade is the reason that options are so scarce. To bypass this in favor of a piggyback unit (essentially a box of resistors) is a compromise when you cannot access and rewrite the factory code. It is a quicker and cheaper development option, and allows for some kind of performance upgrade when a true reflash is not an option.

GIAC has been at the forefront of the new Siemens ECU's for a number of years now, and their ability to build off knowledge taken from previous ECU architecture really makes them a leader with the new platforms.

 

Are the giac gains better than the techart...is a giac tuned car faster than a techart tuned car...that's what I'm interested in...I couldn't careless if they sprinkle fairy dust over the engine just the end result and back up offered..

 

Based on the limitations of what you can do with a piggyback, you will absolutely see better gains with the GIAC upgrade. With a piggyback, you are limited mainly to increasing boost, as to alter timing would require changing the CPS' understanding of top dead center (something that can have serious repercussions).

With an ECU remap, the limit of your alterations is essentially infinite (limited only by knowledge of the ECU). This ultimately allows the car to make more power, especially on vehicles such as the 991 that have so many torque limiters and checks that must be re-written.

 

Gains from a true flash are almost always better than a piggyback. In the latest DMEs, there is piggyback detection and calculations in the DME that will seek to slow the car down via calculations that you can't farce with sensor inputs (such as rate of acceleration). Since we're able to properly calibrate for these, we're able to make real, consistent power gains. In reference to the Porsche Simos family of DMEs, the best we've seen when compared is a piggyback that makes about 40% of what our flashes will make on a given platform (includes Cayenne, Panamera, etc..).

Also, because of the rate of acceleration calculations and other data in the DME that are tracked, piggybacks are absolutely traceable by Porsche.

 

Video please.

 

So, just to confirm - GIAC is harder to trace by OPC?

Are there any guarantees/warranties with GIAC as per the Techart piggyback?

 

Love your term "gains from a true flash are almost always" .."almost always"as a answer I'm afraid doesn't cut it in the real world....


Can you categorically say your tune produces better gains than the "piggyback techart "

It's a simple yes or no...I'm not a software engineer so going into the tech side of the argument is beyond me and probably many others..that's why you tuners charge what you do for your skills..

 

The real question , can techart compesate for exhaust , intercooler and plenum for example ? I dont think a piggyback can be personalized with mods

 

I know it can't so that's not my question...

 

I suppose the answer to this question would technically be "no"...mainly because no one knows what gains the TechArt software actually produces beyond what they claim, or for how long those gains will be produced until the ECU compensates for the piggyback and returns to near stock power levels.

On the other hand...for the sake of comparison (when there is one), I've attached a dyno sheet off results from the GIAC software upgrade.

The dyno sheet shows a comparison between a completely bone stock 991 Turbo S and then the same 991 Turbo S after the GIAC upgrade.

If someone could provide an independent dyno result of what gains the TechArt software produces in the real world, then we could categorically make a comparison.