PDK manual upshifts delay when cold
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PDK manual upshifts delay when cold
Hey guys.
I have an annoying 1 - 2 seconds delay only on manual upshifts when cold and on any program mode.
Dealer recalibrated the clutches but I still have the annoying delay until the car heats up.
This is not my first 991 and havent experienced this before, my service advisor told me it has to be some kind of "protection" on newer cars until the oil reaches its optimum working temperature, this sounds like bullsh@@ to me.
Anyone had a similar experience?
I have an annoying 1 - 2 seconds delay only on manual upshifts when cold and on any program mode.
Dealer recalibrated the clutches but I still have the annoying delay until the car heats up.
This is not my first 991 and havent experienced this before, my service advisor told me it has to be some kind of "protection" on newer cars until the oil reaches its optimum working temperature, this sounds like bullsh@@ to me.
Anyone had a similar experience?
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None of this behavior surprises me.. There is a lot of conditions built into the engine and transmission controls. Some of it is protection but there are other aspects related to emissions requirements..
When an engine is cold it's exhaust output can be a bit different so I suspect a lot of the "cold" things people talk about are related to that (20 second higher RPM at start, shift performance, delay in Sport mode really behaving different etc.)
The shift part doesn't surprise me, because I remember back in the 70's you couldn't even buy a manual corvette in CA, (we had to go to neighboring arizona) because of the spike in HC emissions that occurred between shifts. So tranny performance doesn't surprise me.
When an engine is cold it's exhaust output can be a bit different so I suspect a lot of the "cold" things people talk about are related to that (20 second higher RPM at start, shift performance, delay in Sport mode really behaving different etc.)
The shift part doesn't surprise me, because I remember back in the 70's you couldn't even buy a manual corvette in CA, (we had to go to neighboring arizona) because of the spike in HC emissions that occurred between shifts. So tranny performance doesn't surprise me.
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I have a 2014 C2. Same delay you speak of when cold. Doesn't bug me at all, as it's the system protecting itself until fully warmed up. I actually like to drive a bit slower for the first 5 minutes anyway.
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Dealer said this "protection" is from MY2014. I thought they were talking bull....
Lets see if other MY2014 chime in and confirm this.
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I tried it this morning.
It delayed an up-shift on me once, from a sub 2K 4>5 upshift, and it was a solid second or more delay.
There was no big delay on any other up-shifts.
This was in standard mode with the PDK Lever in Manual.
Perhaps there would be less manual shifting delay in S or S+?
I would find it odd that every cold manual shift would be delayed (as some report).
That does not seem to be my case.
Although I will say, I also tend to drive slow for the first 6 min or so, until I get the oil temp up to 150.
I imagine if I was driving more aggressive, I would probably get more delayed up-shifts (like what others are reporting)?
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My MY 2014 981S has a slight delay in all upshifts until warm, but only a fraction of a second. It's obviously intentional. 2 to 4 seconds would be insane and completely unacceptable.
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13 C2s here;
I tried it this morning.
It delayed an up-shift on me once, from a sub 2K 4>5 upshift, and it was a solid second or more delay.
There was no big delay on any other up-shifts.
This was in standard mode with the PDK Lever in Manual.
Perhaps there would be less manual shifting delay in S or S+?
I would find it odd that every cold manual shift would be delayed (as some report).
That does not seem to be my case.
Although I will say, I also tend to drive slow for the first 6 min or so, until I get the oil temp up to 150.
I imagine if I was driving more aggressive, I would probably get more delayed up-shifts (like what others are reporting)?
I tried it this morning.
It delayed an up-shift on me once, from a sub 2K 4>5 upshift, and it was a solid second or more delay.
There was no big delay on any other up-shifts.
This was in standard mode with the PDK Lever in Manual.
Perhaps there would be less manual shifting delay in S or S+?
I would find it odd that every cold manual shift would be delayed (as some report).
That does not seem to be my case.
Although I will say, I also tend to drive slow for the first 6 min or so, until I get the oil temp up to 150.
I imagine if I was driving more aggressive, I would probably get more delayed up-shifts (like what others are reporting)?
When in Sport or Sport+ it does seem to be temperature based, but upshifts are never really much to my satisfaction in terms of how quick they occur, but are reasonably responsive when in Sport+ which when I do drive in manual is usually where I am.. (however since in sport+ you can't seem to go into 7th, I often pop back to sport when on the highway)..
But going back the OP's original question.. I've never felt anything in the multi-second range in any case..
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this is completely normal. the transmission will not shift as quickly until oil temp gets to 194 degrees I believe (water temp has to be there as well). it is Porsche's Thermal Management - its their way of getting the car up to operating temp quicker.
this is a safety measure for the car and the driveline. in all honesty, this is common in Manual cars as well. you have to warm up the motor and transmission before you SHOULD get aggressive while driving.
taken from Porsche.com - its about the Cayman but it relates to the 911 as well.
Thermal management
The intelligent thermal management system in the Cayman models regulates the temperature in the engine and gearbox to reduce friction losses that occur during the warm-up phase.
Thanks to the purposeful control of heat flow and on-demand, gradual activation of the various cooling circuits, the engine and gearbox warm up to normal operating temperature more rapidly. The resulting reduction in friction also reduces fuel consumption and CO2 emissions. During sporty driving, thermal management also acts to reduce temperatures so as to maintain a high degree of performance.
Our cross-flow cooling system, as used in motorsport, supplies each engine cylinder uniformly with coolant, which protects all valves against thermal overload and, therefore, premature wear. This improves combustion and keeps emissions, fuel consumption and noise comparatively low.
Engine management
The electronic engine management system ensures optimum engine performance at all times. It regulates all engine-related functions and assemblies. The results are optimum power output and torque with comparatively low fuel consumption and emissions – whatever the driving style.
One example is the cylinder-specific knock control. Since engine cylinders never all work under exactly the same conditions, the knock control function monitors each one separately. The ignition point is shifted individually, so as to protect the cylinders and pistons at high engine speeds and loads. For compliance with US standards, the on-board diagnostics detect any faults and defects that may occur in the exhaust and fuel systems and then display them on the on-board computer. This also helps to avoid increased pollutant emissions and unnecessary fuel consumption.
this is a safety measure for the car and the driveline. in all honesty, this is common in Manual cars as well. you have to warm up the motor and transmission before you SHOULD get aggressive while driving.
taken from Porsche.com - its about the Cayman but it relates to the 911 as well.
Efficiency
Thermal management
The intelligent thermal management system in the Cayman models regulates the temperature in the engine and gearbox to reduce friction losses that occur during the warm-up phase.
Thanks to the purposeful control of heat flow and on-demand, gradual activation of the various cooling circuits, the engine and gearbox warm up to normal operating temperature more rapidly. The resulting reduction in friction also reduces fuel consumption and CO2 emissions. During sporty driving, thermal management also acts to reduce temperatures so as to maintain a high degree of performance.
Our cross-flow cooling system, as used in motorsport, supplies each engine cylinder uniformly with coolant, which protects all valves against thermal overload and, therefore, premature wear. This improves combustion and keeps emissions, fuel consumption and noise comparatively low.
Engine management
The electronic engine management system ensures optimum engine performance at all times. It regulates all engine-related functions and assemblies. The results are optimum power output and torque with comparatively low fuel consumption and emissions – whatever the driving style.
One example is the cylinder-specific knock control. Since engine cylinders never all work under exactly the same conditions, the knock control function monitors each one separately. The ignition point is shifted individually, so as to protect the cylinders and pistons at high engine speeds and loads. For compliance with US standards, the on-board diagnostics detect any faults and defects that may occur in the exhaust and fuel systems and then display them on the on-board computer. This also helps to avoid increased pollutant emissions and unnecessary fuel consumption.