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Like others, I find little perceptible lag. After all, these are still 3.0 liter engines, with mild turbocharging.
When driving for performance, we keep revs up. Above 4000 RPM there is really no lag with the 991.2. And NA engines are up in their power band. Both types offer thrilling performance.
At lower RPM, the mild turbo 991.2 might have just detectable lag. The 991.1 instead offers "lug". I am biased, but I think I know which type will win if we stomp on both in 3rd gear at 1000 RPM.
At 1000 rpm, the lag is enormous, several seconds. And the turbo engine never reaches full boost that low. Under those conditions, I’d expect the NA engine’s larger displacement and higher compression ratio to easily dominate. The NA car would pull ahead and the turbo wouldn’t catch up for at least five seconds.
Even at 1500 rpm, the turbo engine needs about three seconds to reach full boost, so in roll-on, the NA car would pull out a lead for several seconds before the turbo achieved substantial boost and it’s superior torque allowed it to catch up and pull ahead.
By 2000 rpm, the turbo lag is reduced and at full boost, the turbo engine has about 50% more torque, so the NA car’s lead might only last a second or two.
And above 2500, the turbo probably never falls behind at all.
I say all this as a 991.2 owner, who accepts the lag in exchange for the superior torque. But there is lag and at low rpm, it’s very obvious.
I'm on my second 991.2 and honestly, I don't perceive the lag unless the RPM's are really low. In more spirited driving, I don't notice it at all. Love the response of the car.....
Exactly. Virtually no lag if you're over 2500 rpm.
I find there to be lag when I'm in "normal" mode, but as others have pointed out, there is little to no lag when in "sport plus" The following chart from Car and Driver shows that the 991.2 base holds its own against the 991.1 GTS (much larger NA engine) when driven hard:
I find there to be lag when I'm in "normal" mode, but as others have pointed out, there is little to no lag when in "sport plus" The following chart from Car and Driver shows that the 991.2 base holds its own against the 991.1 GTS (much larger NA engine) when driven hard:
And the 991.2GTS will do 0-60 in 3.0 seconds, according to C&D. Which is simply amazing!
I think you are confusing throttle response with turbo lag. E-drive response in all modern 911s is different than the old analog cars with physical linkages.
So where/when does the NA 991.1 GTS pull ahead (if ever)- going from 118 mph to say 150 mph and over a half mile/mile distance given the increased horsepower ?-just curious
So where/when does the NA 991.1 GTS pull ahead (if ever)- going from 118 mph to say 150 mph and over a half mile/mile distance given the increased horsepower ?-just curious
Looking at the Car & Driver data, they are tied at 1/4 mile and 118 mph, gts takes a .2 sec lead at 130 mph.
I don't discern any "turbo lag" in my '19 C4S, even though I'm still in the run-in stage. In the Sport settings the response is sharp, throttle response is muted in the lesser mode.
The darn thing is definitively trying to get me ticketed because 100 MPH magically appears on the speedo when on an interstate.
When you accelerate in the higher gears, there is ample push at 2500 RPM and above to leave everything behind, downshifting is an option, not a necessity.
I find there to be lag when I'm in "normal" mode, but as others have pointed out, there is little to no lag when in "sport plus" The following chart from Car and Driver shows that the 991.2 base holds its own against the 991.1 GTS (much larger NA engine) when driven hard:
At 1000 rpm, the lag is enormous, several seconds. And the turbo engine never reaches full boost that low. Under those conditions, I’d expect the NA engine’s larger displacement and higher compression ratio to easily dominate. The NA car would pull ahead and the turbo wouldn’t catch up for at least five seconds.
Even at 1500 rpm, the turbo engine needs about three seconds to reach full boost, so in roll-on, the NA car would pull out a lead for several seconds before the turbo achieved substantial boost and it’s superior torque allowed it to catch up and pull ahead.
By 2000 rpm, the turbo lag is reduced and at full boost, the turbo engine has about 50% more torque, so the NA car’s lead might only last a second or two.
And above 2500, the turbo probably never falls behind at all.
I say all this as a 991.2 owner, who accepts the lag in exchange for the superior torque. But there is lag and at low rpm, it’s very obvious.
You might be right. I should have picked 1500 RPM, where the 991.2 makes 375 Nm compared to the 991.1 making 300. And by 2000 RPM, the .2 is up to 400 Nm, and the .1 is up to 320 Nm.
Anyway we should try this. And if the 991.2 still does not win, we will repeat in my county, where normally aspirated engines lose about 25% of power due to altitude!
01-30-2019, 09:02 AM
