997 Turbo / GT2 2006–2012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.
Sponsored by:
Sponsored by: Bears Transport

Modified valve control system

Thread Tools
 
Search this Thread
 
Rate Thread
 
  #1  
Old 07-27-2015, 12:32 PM
MMK110464's Avatar
Registered User
Thread Starter
Join Date: Jun 2005
Location: Miami, FL
Posts: 149
Rep Power: 24
MMK110464 is on a distinguished road
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
 
  #2  
Old 07-27-2015, 12:34 PM
ecpChris's Avatar
Registered User
Join Date: Dec 2012
Location: NJ
Posts: 1,216
Rep Power: 262
ecpChris Is a GOD !ecpChris Is a GOD !ecpChris Is a GOD !ecpChris Is a GOD !ecpChris Is a GOD !ecpChris Is a GOD !ecpChris Is a GOD !ecpChris Is a GOD !ecpChris Is a GOD !ecpChris Is a GOD !ecpChris Is a GOD !
Yes, power hits early and hard. No problem with city driving although the car will have a touch of lag initially with throttle
 
  #3  
Old 07-27-2015, 12:37 PM
MMK110464's Avatar
Registered User
Thread Starter
Join Date: Jun 2005
Location: Miami, FL
Posts: 149
Rep Power: 24
MMK110464 is on a distinguished road
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.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Armytrix_F1_Exhaust
Mercedes / AMG
12
07-07-2019 11:31 PM
vividracing
Ferrari
0
08-24-2015 04:35 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Modified valve control system



All times are GMT -6. The time now is 01:54 AM.