997 Turbo / GT2 2006–2012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.
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Modified valve control system

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Old Jul 27, 2015 | 12:32 PM
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Modified valve control system

Hi everyone:

I actually drive a 997.2 C4S and thinking about getting a TT or TTS.

After doing some research, I encountered this piece of info:

In the 911 Turbo S models, a modified valve control system and an adaptation of the engine management, combined with an increase in maximum boost pres- sure by around 0.2 bar, enable the power unit to produce 390 kW (530 hp) between 6,250 rpm and 6,750 rpm and generate a permanently high torque of
700 Nm between 2,100 rpm and 4,250 rpm to deliver even more power to the road.


I do part of my driving in the city so higher low end torque is attractive to me.

From your experience, does the modified valve control system really makes a difference in the low end torque?

TIA
 
Old Jul 27, 2015 | 12:34 PM
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Yes, power hits early and hard. No problem with city driving although the car will have a touch of lag initially with throttle
 
Old Jul 27, 2015 | 12:37 PM
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Originally Posted by ecpChris
...the car will have a touch of lag initially with throttle
Hi chris:

Thanks for the quick reply.

Is this lag also an issue with the TT? Can it be corrected with a tune?

I do have a lag with the C4S and its not pleasant.
 
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