New GTS is out - 450 hp
01-10-2017, 09:47 PM
#106
Porsche and Ferrari did a lot of engineering to minimize turbo lag with the 991.2 and the 488, and those two models have less turbo lag than any other turbo car on the market.
I expect that tampering with this finely engineered process by doing aftermarket tuning of the 991.2 or 488 would increase turbo lag, not reduce it.
I expect that tampering with this finely engineered process by doing aftermarket tuning of the 991.2 or 488 would increase turbo lag, not reduce it.
In fact you can see tuning houses removing these limits for "easy gains" - in effect restoring some of the lag.
01-11-2017, 12:55 AM
#107
It's possible but not guaranteed.
When Porsche did the tuning, at a minimum they have to keep fuel economy, CO2 level, turbos longevity in check.
With after market tuning all that restriction goes out of the window with engine response and performance taking all the priorities.
If you have aggressive tuning (for greater engine response) the turbos can die prematurely (before warranty expires) if car is driven hard regularly and/or in high humidity climates.
01-11-2017, 01:04 AM
#108
Agree. Especially as the way that Ferrari "fixed" turbo lag involves artificially limiting torque in order to apply it more progressively - ie smooth the curve (I can only guess that Porsche did something similar).
In fact you can see tuning houses removing these limits for "easy gains" - in effect restoring some of the lag.
In fact you can see tuning houses removing these limits for "easy gains" - in effect restoring some of the lag.
It is by limiting boost (not torque) in the lower gears. Though torque is dependent on boost level in a forced induction engine.
More boost = more lag BUT more torque
Bigger turbo = more lag BUT more top end power
01-11-2017, 01:20 AM
#109
01-11-2017, 02:16 AM
#110
Mecca
I just picked up a Focus RS and I'm going to have the exhaust and COBB tune done next week. Doing this after driving my buddies after his was done...substantial difference in performance. The car is a hoot to drive. Makes driving in the snow (in drift mode) a lot of fun again!
LYFE Motorsports here in Utah has been playing with the new 991.2 S and has made some nice performance gains with just an exhaust. When the tuners are out for this car (GTS), its going to be a beast! I'm a NA guy but the S with the new exhaust sounds really good.
I just picked up a Focus RS and I'm going to have the exhaust and COBB tune done next week. Doing this after driving my buddies after his was done...substantial difference in performance. The car is a hoot to drive. Makes driving in the snow (in drift mode) a lot of fun again!
LYFE Motorsports here in Utah has been playing with the new 991.2 S and has made some nice performance gains with just an exhaust. When the tuners are out for this car (GTS), its going to be a beast! I'm a NA guy but the S with the new exhaust sounds really good.
01-11-2017, 05:55 AM
#111
just configured the new GTS how i did my old and the price difference is only about 2%
base price increased 5% but PCM is free now which used to be a 3147 Euro item
not too bad
base price increased 5% but PCM is free now which used to be a 3147 Euro item
not too bad
01-11-2017, 06:43 AM
#112
01-11-2017, 06:59 AM
#113
Three Wheelin'
Originally Posted by Spyder Man
No it is not.
Ferrari used boost restrictions in lower gears to reduce lag, not torque restrictions.
Torque restrictions doesn't reduce lag by itself.
Ferrari used boost restrictions in lower gears to reduce lag, not torque restrictions.
Torque restrictions doesn't reduce lag by itself.
01-11-2017, 07:04 AM
#114
01-11-2017, 03:55 PM
#115
The GTS fills the gap in the normal (non-GT) 911 line up for some one wanting rear wheel drive only but with wider hips.
Other than that it is a carrera S with a discounted options package added on (including most sport options).
Other than that it is a carrera S with a discounted options package added on (including most sport options).
01-11-2017, 10:20 PM
#116
Reducing torque can be done via altering ignition timing and air/fuel mixture to bring down the efficiency of the engine and thereby reducing the torque output. This however would have increased lag and not reduced it in a turbo-charged engine.
01-11-2017, 10:49 PM
#117
Tuners will reduce lag with timing, fuel and boost but it might still "feel" laggier because it will ramp up to substantially more power. Picture an engine that runs one pound of boost. The difference between no boost and full boost is nearly imperceptible but on an engine that runs 40 pounds of boost, you can really feel the boost come in, even if it is very linear.