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991 Engine Auto start/stop

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  #16  
Old 09-07-2011 | 02:43 PM
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Originally Posted by catchmyshadow
Yeah, but Porsche has to do something to achieve those strict future CO2 regulations in the US but also elsewhere.
Without such things as a Start/Stop, a long ratio-7th gear, the coasting function etc. we would probably soon see 4 cylinders in the 911.
i mean the whole Porsche thing started with 4 cylinders but it´s surely not something a 911 owner would love to see.

so the choice is:
6 cylinder with all that fuel/CO2 reducing stuff
or no 6 cylinders anymore in the near future.

i think it is clear which one to choose
Hmm...when you put it like that, it makes a lot of sense.

I almost fell out of my chair when the R&D manager said that he might go turbo later with the carrera line. I almost fell out of my chair when I heard that. I'd imagine that the move to turbo in the carrera line goes hand in hand with a four cylinder engine.
 
  #17  
Old 09-07-2011 | 02:59 PM
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Originally Posted by Inglorious
Hmm...when you put it like that, it makes a lot of sense.

I almost fell out of my chair when the R&D manager said that he might go turbo later with the carrera line. I almost fell out of my chair when I heard that. I'd imagine that the move to turbo in the carrera line goes hand in hand with a four cylinder engine.
i think all these efforts to reduce fuel consumption and CO2 emissions are mainly because of all the regulations around the world and not to please the customers in particular. it´s unfortunately something Porsche and a Porsche customer has to accept.

Hatz also said that currently there are no plans for a 4-Cylinder in a 911.
That´s a good sign for the next, let´s say 10 years.

But speaking of a 4-Cylinder in a Porsche:
for the new Cayman/Boxster and upcoming 551 a 4-Cylinder is already confirmed:


(Autocar.uk)
 

Last edited by catchmyshadow; 09-07-2011 at 03:07 PM.
  #18  
Old 09-07-2011 | 03:29 PM
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It is probably not a bad thing to have a cheaper entry level Porsche with a 4 cylinder engine but the decision to build this car is also partly influenced by Corporate CAFE requirements. So in order for Porsche to continue building 911 with H6 and H6 turbo engines (and the promised upcoming Ferrari 458 competitor), Porsche has to sell many units of lower fuel consumption cars as a brand to "balance" out the higher consumption of the higher performance cars. Apparently, each brand has to meet various standards not the VW empire as a whole.

Someday, some manufacturer will build a cost effective production car which runs on hydrogen with no CAFE requirements to adhere to with a raucous exhaust note and screaming performance!!! I can dream...
 
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Old 09-07-2011 | 03:38 PM
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Originally Posted by Inglorious
Hmm...when you put it like that, it makes a lot of sense.

I almost fell out of my chair when the R&D manager said that he might go turbo later with the carrera line. I almost fell out of my chair when I heard that. I'd imagine that the move to turbo in the carrera line goes hand in hand with a four cylinder engine.
Inglorious your sinagnature is , still waiting for the 991's to grow on me, i kinda agree with you...lol
 
  #20  
Old 09-07-2011 | 03:42 PM
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Originally Posted by SpeeddemonC2
It is probably not a bad thing to have a cheaper entry level Porsche with a 4 cylinder engine but the decision to build this car is also partly influenced by Corporate CAFE requirements. So in order for Porsche to continue building 911 with H6 and H6 turbo engines (and the promised upcoming Ferrari 458 competitor), Porsche has to sell many units of lower fuel consumption cars as a brand to "balance" out the higher consumption of the higher performance cars. Apparently, each brand has to meet various standards not the VW empire as a whole.

Someday, some manufacturer will build a cost effective production car which runs on hydrogen with no CAFE requirements to adhere to with a raucous exhaust note and screaming performance!!! I can dream...
exactly, it´s a pity, but the future of big engines doesn`t look too good, even for 6 cylinders. Hydrogen still needs a major breakthrough, it´s still too expensive, inefficient and complicated, mass production of bioethanol is not very eco friendly and also a problem ethically. So the first step will be hybrid support (combined with small engines, most of them turbo powered) in all models and later on (25-30 years?) most Porsches could be mainly powered by electric motors.
People who read this will think: oh no, that would be the end!
The end of wonderful engine sounds, most likely yes, but future e-cars will offer performance and possibilities that current gasoline engines can only dream of!


P.S. The new Porsche 458/Gallardo fighter will most likely get a V8TT, a V10 a la Carrera GT is not green enough, a midengine Porsche with V6TT is probably not something people would spend >300k on.
 

Last edited by catchmyshadow; 09-07-2011 at 04:11 PM.
  #21  
Old 09-08-2011 | 09:01 AM
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How are these new emission standards written? If it comes with a "turn it Off/On button" to meet the standards Ok and I suppose it will be called the new Sport or Race version from Porsche where you turn the gizmos off to get your performance. As a consumer I do not like getting stuck in the middle of the changes when manufactures do not know what technologies will prevail. Example: I stayed out of buying a new TV for years seeing weather it was going to be Plasma--Lcd etc.
 

Last edited by Mother; 09-08-2011 at 09:11 AM.
  #22  
Old 09-08-2011 | 01:16 PM
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Originally Posted by rvhpno80
Inglorious your sinagnature is , still waiting for the 991's to grow on me, i kinda agree with you...lol
Glad you like it. The origins of that bumper sticker is described here.

https://www.6speedonline.com/forums/...1-pricing.html

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  #23  
Old 09-08-2011 | 01:42 PM
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Originally Posted by SpeeddemonC2
The auto engine stop start is one way for manufacturers to help move toward meeting increasingly stringent CAFE standards. As long as legislation mandates lower fuel consumption standards over time, manufacturers will resort to these methods to decrease fuel consumption. I cannot really blame them!

Another unwelcome feature I noticed when I first drove my new (back in 09) F430 Spider was that the F1 transmission always starts in automatic mode. The driver has to manually disengage the auto mode. This again was forced on Ferrari by European fuel consumption rules.
Interesting.. My gallardo has to start in F1 mode then i can switch to auto if i want.. Its kinda annoying if i just want to stay in auto mode from the start. Lambo doesnt follow the consumption rules?? loll
 
  #24  
Old 09-08-2011 | 01:51 PM
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Originally Posted by porscheboy997
Interesting.. My gallardo has to start in F1 mode then i can switch to auto if i want.. Its kinda annoying if i just want to stay in auto mode from the start. Lambo doesnt follow the consumption rules?? loll
Yes Lambo does too! Now! Don't know what year your Gallardo is but the new Aventador starts off in automatic every time you start the car and you have to manually switch it to manual mode. See the attached video review by Evo and go 1.05 and you'll see it!
http://www.youtube.com/watch?v=0XPtj7UR4yI
 
  #25  
Old 09-08-2011 | 08:22 PM
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Anyone know how much gas this is suppose to save? I assume it's represented in the estimated MPG number for city driving. I'd be curious how much this feature is good for in the est. MPG. Seems like starter motors would need replacing more often.
 
  #26  
Old 09-08-2011 | 09:03 PM
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Originally Posted by Aerodude
Anyone know how much gas this is suppose to save? I assume it's represented in the estimated MPG number for city driving. I'd be curious how much this feature is good for in the est. MPG. Seems like .
Automatic Start/Stop function + thermal management + electrical system recuperation + coasting function = 16% less fuel (Carrera S)

P.S. "starter motors would need replacing more often" is not the case as some engineer stated a few months ago. No need to worry.
 
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