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Does the Cobb AccessPort system allow the owner to modify the tune in any way? The big jump in torque at low rpm, compared with the GIAC suggests a big boost increase at those engine speeds. In fact, since the torque is even greater than the X51 curve at those rpms, it suggests to me it might be risky for the engine.
I would be more comfortable with the tune, if I could limit the boost to the 18.25 psi that the X51 engine uses. Since the base engine is the same across all of these 991.2 Carreras, that would seem to be a safe and conservative option, while still offering a substantial power and torque increase in a base car.
You can get your car custom tuned by a Pro Tuner to create a map to your liking using COBB. And you can easily get multiple maps made which you can just switch between. Say if you want a low boost or high boost map, etc.
It seems the 3.0 motor is pretty stout, and the PDK is good with a lot of power before its got issues. Not sure I need to push it to stage 2 ever, but for stage one for any of them its all fine I'd imagine.
You can get your car custom tuned by a Pro Tuner to create a map to your liking using COBB. And you can easily get multiple maps made which you can just switch between. Say if you want a low boost or high boost map, etc.
Thanks, but you can't do it yourself? Does it require some special equipment, or a special versionof the tune?
Thanks, but you can't do it yourself? Does it require some special equipment, or a special versionof the tune?
Tuner needs to basically adjust engine parameters to tailor fit your car. Would need a dyno, or a way provide logs regularly to tuner in order for review and revisions to take place. It's a process that requires testing and revisions.
A proper tuner would have the ability and equipment needed to do this, along with the knowledge (the main thing needed).
Thanks, but you can't do it yourself? Does it require some special equipment, or a special versionof the tune?
You would need to have access/license from Cobb to use their pro-tuner software...unfortunately its not something commonly available outside of tuning shops and I can imagine would be quite expensive to a consumer. If you are thinking of adjusting fuel tables on something like an SAFC, Power FC, etc-this is completely different.
For the 3 engines of the 991.2 Carrera 3.0TT models, you can find the Stage 1 COBB maps for 91 and 93 octane at https://www.cobbtuning.com/products/...-gts-2017-2019. While the kit you order varies according to PDK or manual and 2 versus 4, the engine power and torque maps all exhibit one of these three sets of curves for the Stage 1 Cobb tune. Only the intake air filter upgrade is required for Stage 1.
The Base & T and the S & GTS PDK transmissions might have different torque limits. But the S and GTS must be the same PDK limits because the X51 PowerKit does not alter the PDK clutches. I read somewhere the 991.2 Carrera torque limit cutout for the PDK is set at 700 N-m or 516 ft-lbs. But im not sure if that included the PDKs on the Base and T...
Does anybody know for a fact if the Base & T have different PDK clutches than the S & GTS? If so, the PDK transmission part numbers should be different.
I dont have part #s for PDKs but different models will have different torque limits programmed in the Transmission control unit, above which they will start to behave goofy. Giac had a hard time with the base pdk pulling power at higher torque outputs. Even if the transmission hardware is the same, the TCU is still programmed by porsche (for now). Having said that, porsche has been known to use different clutches mated to the gearbox “beefed up” to handle more torque. The extra tq in the gts is not nominal and I find it hard to believe it shares the same clutch pack with the base. That would be my best guess if different part numbers could exist.
Manual is all the same across all carrera models think
Biggest bang for the buck gains are with the base but they have the lowest tcu tq limits from the factory. With a TCU program and a proper calibration i bet the stock setup can push much bigger numbers like Dyno Spectrum. How safe is it? Who knows
Edit: just remembered according to the technik manual the base and s pdk both rated for 406 ft lb. this is the one in your car I believe as the x51 doesnt touch the transmission. Interesting that the gts has 406 ftlb from the factory.
Last edited by Rennolazine; 05-30-2019 at 10:29 PM.
Zero problems with manual T, and over 500 lb/ft Hydra tune. In fact, its beyond awesome. 3rd gear in sport plus pulls like crazy and as stated above, pegs over 20psi and holds it.
Zero problems with manual T, and over 500 lb/ft Hydra tune. In fact, its beyond awesome. 3rd gear in sport plus pulls like crazy and as stated above, pegs over 20psi and holds it.
@rosenbergendo You are the man! Sorry I wasn't here for your tuning appointment - Vacation was calling my name haha! I am glad to hear you are enjoying your car with the added love from Hydra.
If anyone has any questions regarding our software, feel free to give me (Bobby) a call at the shop or shoot me a PM!
Just to avoid any misinterpretation, the Dyno Spectrum current product offering is Cobb AP with a Protune (custom) calibration by the team at DS.
You are not currently getting DS1 or any of the McLaren offerings. That is not to disvalue the service they are offering, just to keep this on the correct track.
It was 700 N-m (516 ft-lbs) that I read was the PDK limit. But I don't recall which 991.2 911 Carerra models(s) it applies to...
700 NM is the new 8sp pdk in panamera and 992. The pdk in your car is supposedly rated at 406 ft lb (550nm) according to the technik manual p70. This was published before the gts came out. But it makes wait for it... 406 ft lb...lol
According to giac even though the s and base have the same pdk, the electronically programmed tq safety limit is lower in the base (not the case for manual). But if you go for high power things might get wonky with the pdk since according to the dyno you already making 396 ftlb at the wheels (probably much more since we used an uncorrected mustang dyno measurement) stock after the x51.
05-30-2019, 12:45 PM
