992 Carrera OBD Flashing
#1396
Rennlist Member
The linear pedal feel of the 911 is something we also like very much, for that reason we do not touch it. If a user wishes to change pedal sensitivity we can do that with ProTuning. We don't do that very often because how good the car already is and is usually an odd-ball request.
-Charles@M
-Charles@M
#1397
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-Charles@M
#1398
@M Engineering
Apologies if this is addressed elsewhere, but what changes do you make to throttle response in the various drive modes? I drive the car in Sport 99% of the time and find the throttle response pretty ideal for spirited street driving. If I were to tune, I wouldn't want to modify that behavior. Is this something that can be 'left alone' or ??
Apologies if this is addressed elsewhere, but what changes do you make to throttle response in the various drive modes? I drive the car in Sport 99% of the time and find the throttle response pretty ideal for spirited street driving. If I were to tune, I wouldn't want to modify that behavior. Is this something that can be 'left alone' or ??
#1399
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This is what I’m doing. Running stage 2 on original plugs and will ask dealer to gap new plugs at 30k service. Probably around May this year.
#1400
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The reason for the tight gapping we request is due to spark blowout, which is more common at higher power levels (big turbos for example) or plugs with old age and large gapping. Think of it like using your breath to blow out a candle. With more air positive manifold pressure (boost), spark can get blown out. With a tighter gap its harder to blow it out. When a spark blowout occurs you get misfires.
-Charles@M
-Charles@M
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Jeff Whitten (03-24-2024)
#1402
The linear pedal feel of the 911 is something we also like very much, for that reason we do not touch it. If a user wishes to change pedal sensitivity we can do that with ProTuning. We don't do that very often because how good the car already is and is usually an odd-ball request.
-Charles@M
-Charles@M
#1403
Thanks Mitch. While my car was a challenge to get right, I don't think many other vendors would or could offer the level of service that you guys have provided. Always responsive with a goal to get it where it needed to be. Glad at least for now, I don't have to worry about replacing the injectors.
What is the actual issue? Porsche aren't saying much, and I am annoyed they only sourced one injector.
im just waiting on replacement injector to arrive from Germany, car still under warranty, its MY21 C2S.
#1404
I am sorry if this question has been asked in the last 95 pages
The M engineering tune on a base 992 allows one to max HP and to some degree Torque at about 4k to 5K RPM which I am assuming is why it makes the car so responsive is that you are getting close to max of both at regular driving RPM's. I guess my question related to the fact that since the engine will be putting out max HP and torque for most of the driving time does that not cause undue stress in an engine especially a base with smaller turbos.
Secondly It seems that there is also little reason then to visit RPM's of 7K because the gains that are achieved over say 5.5K are maginal
Is my thinking flawed ?
Thanks
The M engineering tune on a base 992 allows one to max HP and to some degree Torque at about 4k to 5K RPM which I am assuming is why it makes the car so responsive is that you are getting close to max of both at regular driving RPM's. I guess my question related to the fact that since the engine will be putting out max HP and torque for most of the driving time does that not cause undue stress in an engine especially a base with smaller turbos.
Secondly It seems that there is also little reason then to visit RPM's of 7K because the gains that are achieved over say 5.5K are maginal
Is my thinking flawed ?
Thanks
#1405
I am sorry if this question has been asked in the last 95 pages
The M engineering tune on a base 992 allows one to max HP and to some degree Torque at about 4k to 5K RPM which I am assuming is why it makes the car so responsive is that you are getting close to max of both at regular driving RPM's. I guess my question related to the fact that since the engine will be putting out max HP and torque for most of the driving time does that not cause undue stress in an engine especially a base with smaller turbos.
Secondly It seems that there is also little reason then to visit RPM's of 7K because the gains that are achieved over say 5.5K are maginal
Is my thinking flawed ?
Thanks
The M engineering tune on a base 992 allows one to max HP and to some degree Torque at about 4k to 5K RPM which I am assuming is why it makes the car so responsive is that you are getting close to max of both at regular driving RPM's. I guess my question related to the fact that since the engine will be putting out max HP and torque for most of the driving time does that not cause undue stress in an engine especially a base with smaller turbos.
Secondly It seems that there is also little reason then to visit RPM's of 7K because the gains that are achieved over say 5.5K are maginal
Is my thinking flawed ?
Thanks
Your thinking is flawed with respect to the car putting out “max HP and torque” at regular driving RPMs. The car is putting out exactly the same level of HP as a stock car on partial throttle when you are in partial throttle, I.e. steady state cruising at 45 mph or 75 mph or whatever. The injector duty cycles are very low and you are getting well over 30 mpg at partial throttle steady state cruising in 7th gear or even in 6ht or 5th gear while going 40 mph. It is only putting out “max” HP and torque when you are completely flooring it. The tune does nothing to make your MPG worse and places zero additional stress on your engine or transmission or any other component on your car when you are just driving normally around town.
Also, most of us are not tracking our cars or doing top speed runs or half mile events where we are running our cars over 150 mph. We are occasionally flooring our cars a few seconds here and there. Any more and we would likely get arrested as it’s super easy to accelerate to 120 or even 150 mph. So even if your car is tuned, you are putting a minimal amt more wear on your car because you are simply not going to drive it like an ape. Of course if you are hooning it all the time you will burn through tires and put more wear on your turbos and cooling system and suspension and brakes etc. but even then these are Porsches and they can take the abuse really well as long as the car is well maintained and you are running a good tune from a reputable tuner.
#1406
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I am sorry if this question has been asked in the last 95 pages
I guess my question related to the fact that since the engine will be putting out max HP and torque for most of the driving time does that not cause undue stress in an engine especially a base with smaller turbos.
Thanks
I guess my question related to the fact that since the engine will be putting out max HP and torque for most of the driving time does that not cause undue stress in an engine especially a base with smaller turbos.
Thanks
Just my oversimplified thoughts on power/turbos since I've lived with every combination:
- Stock: Porsche makes a nice car that's very capable out of the box.
- Base Turbos w/ Tune: A nice place for folks who want to wake the car up with downloadable power - the simple or starter choice.
- S/GTS Turbos w/ Tune: A sweet spot for folks who want great power (close to 992 Turbo power) and retain low/mid range torque/responsiveness.
- Pure 800 Turbos w/ Tuning: For the folks who want power (close to 992 Turbo tuned power), want to be thrown back in their seat and be rewarded for taking the car to redline.
I have an appreciation for all of it, there isn't a wrong choice, just more a matter of preference. My T just arrived yesterday so I'll be going back through it all again in a manual car. I really, really enjoyed the Stage 4 set-up (Pure 800) where the car was making about 700HP. Incredible speed, aggressive sounds but kept the overall ethos of a 911, sort of the limits without making the car feel too powerful/unbalanced with the handling/brakes, etc. Again, just my perspective for what it's worth!
- Jon
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#1407
The engine/mechanicals are identical across the Base/T and S/GTS. So the engine is certainly capable of handling more power. We've been running 750+HP on 991.2 and 992s for years without issue. The 9A2 EVO engines have all forged internals and the blocks are shared on the 992 Turbo / Turbo S (where Porsche bores out to get the 3.7L). To your point, the base turbos being smaller have a smaller efficiency zone, so they work very good in the mid-RPM range but run out of flow/efficiency up top due to their sizing. This is why if you swap turbos for the S/GTS or Pure you can get a lot more power above 5K RPM on these engines. The engine won't see more stress, just the turbos getting worked harder. A base with a software tune gets you pretty close to a stock GTS in terms of power which is a great spot for a lot of folks. If you want more, the biggest limitation is the turbo sizing.
Just my oversimplified thoughts on power/turbos since I've lived with every combination:
- Stock: Porsche makes a nice car that's very capable out of the box.
- Base Turbos w/ Tune: A nice place for folks who want to wake the car up with downloadable power - the simple or starter choice.
- S/GTS Turbos w/ Tune: A sweet spot for folks who want great power (close to 992 Turbo power) and retain low/mid range torque/responsiveness.
- Pure 800 Turbos w/ Tuning: For the folks who want power (close to 992 Turbo tuned power), want to be thrown back in their seat and be rewarded for taking the car to redline.
I have an appreciation for all of it, there isn't a wrong choice, just more a matter of preference. My T just arrived yesterday so I'll be going back through it all again in a manual car. I really, really enjoyed the Stage 4 set-up (Pure 800) where the car was making about 700HP. Incredible speed, aggressive sounds but kept the overall ethos of a 911, sort of the limits without making the car feel too powerful/unbalanced with the handling/brakes, etc. Again, just my perspective for what it's worth!
- Jon
Just my oversimplified thoughts on power/turbos since I've lived with every combination:
- Stock: Porsche makes a nice car that's very capable out of the box.
- Base Turbos w/ Tune: A nice place for folks who want to wake the car up with downloadable power - the simple or starter choice.
- S/GTS Turbos w/ Tune: A sweet spot for folks who want great power (close to 992 Turbo power) and retain low/mid range torque/responsiveness.
- Pure 800 Turbos w/ Tuning: For the folks who want power (close to 992 Turbo tuned power), want to be thrown back in their seat and be rewarded for taking the car to redline.
I have an appreciation for all of it, there isn't a wrong choice, just more a matter of preference. My T just arrived yesterday so I'll be going back through it all again in a manual car. I really, really enjoyed the Stage 4 set-up (Pure 800) where the car was making about 700HP. Incredible speed, aggressive sounds but kept the overall ethos of a 911, sort of the limits without making the car feel too powerful/unbalanced with the handling/brakes, etc. Again, just my perspective for what it's worth!
- Jon
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#1408
Instructor
The engine/mechanicals are identical across the Base/T and S/GTS. So the engine is certainly capable of handling more power. We've been running 750+HP on 991.2 and 992s for years without issue. The 9A2 EVO engines have all forged internals and the blocks are shared on the 992 Turbo / Turbo S (where Porsche bores out to get the 3.7L). To your point, the base turbos being smaller have a smaller efficiency zone, so they work very good in the mid-RPM range but run out of flow/efficiency up top due to their sizing. This is why if you swap turbos for the S/GTS or Pure you can get a lot more power above 5K RPM on these engines. The engine won't see more stress, just the turbos getting worked harder. A base with a software tune gets you pretty close to a stock GTS in terms of power which is a great spot for a lot of folks. If you want more, the biggest limitation is the turbo sizing.
Just my oversimplified thoughts on power/turbos since I've lived with every combination:
- Stock: Porsche makes a nice car that's very capable out of the box.
- Base Turbos w/ Tune: A nice place for folks who want to wake the car up with downloadable power - the simple or starter choice.
- S/GTS Turbos w/ Tune: A sweet spot for folks who want great power (close to 992 Turbo power) and retain low/mid range torque/responsiveness.
- Pure 800 Turbos w/ Tuning: For the folks who want power (close to 992 Turbo tuned power), want to be thrown back in their seat and be rewarded for taking the car to redline.
I have an appreciation for all of it, there isn't a wrong choice, just more a matter of preference. My T just arrived yesterday so I'll be going back through it all again in a manual car. I really, really enjoyed the Stage 4 set-up (Pure 800) where the car was making about 700HP. Incredible speed, aggressive sounds but kept the overall ethos of a 911, sort of the limits without making the car feel too powerful/unbalanced with the handling/brakes, etc. Again, just my perspective for what it's worth!
- Jon
Just my oversimplified thoughts on power/turbos since I've lived with every combination:
- Stock: Porsche makes a nice car that's very capable out of the box.
- Base Turbos w/ Tune: A nice place for folks who want to wake the car up with downloadable power - the simple or starter choice.
- S/GTS Turbos w/ Tune: A sweet spot for folks who want great power (close to 992 Turbo power) and retain low/mid range torque/responsiveness.
- Pure 800 Turbos w/ Tuning: For the folks who want power (close to 992 Turbo tuned power), want to be thrown back in their seat and be rewarded for taking the car to redline.
I have an appreciation for all of it, there isn't a wrong choice, just more a matter of preference. My T just arrived yesterday so I'll be going back through it all again in a manual car. I really, really enjoyed the Stage 4 set-up (Pure 800) where the car was making about 700HP. Incredible speed, aggressive sounds but kept the overall ethos of a 911, sort of the limits without making the car feel too powerful/unbalanced with the handling/brakes, etc. Again, just my perspective for what it's worth!
- Jon
Last edited by mcacs1; 04-03-2024 at 09:11 PM.
#1409
Rennlist Member
stage1 is meant to very very safe. The issue with higher stages is usually higher heat build up due to higher boost, which then causes the car to adjust down performance anyway as the stock safety mechanisms to avoid knock are maintained. As one great tuner (John Banks) once put it -- stage2++ can make you faster for one pull, stage1 makes you faster the whole rest of the time. You choose what you want.
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mcacs1 (04-04-2024)
#1410
Rennlist Member
Thanks for your detailed answer, I always enjoy reading your posts and getting your well balanced insights. May I ask why Porsche keeps the tune so low? What running conditions should one avoid with say a Stage 1 tune on a base Carrera to avoid the stresses that the Porsche factory 'tune' means to minimize? My car sees outdoor temps from -20F to 95F, but I don't track it.
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mcacs1 (04-04-2024)