dflowerz

Yeah those old turbos were a handful with the lag then huge power surge, or so I have heard. Never driven one, and no desire to. I would probably get myself in trouble in short order.

sexfiend

lol you're in the same boat. i promised getting the 992 turbo s, but for now leasin a base 991.2. some ppl can drive used, but not for me...

Valvefloat991

The turbos in the 991.2 are hardly free of lag. The engine responds very quickly with revs over 4000 rpm. However, if you go full throttle at 1500 in 7th gear, the lag is 2-3 seconds.

phow

Agreed. I actually just drove a 991.2 C2S again today and it was the first time since purchasing my 991.1 C2S. There is no doubt the 991.2 is the quicker car but there is noticeable lag if the turbos aren't already spooled up.

The best way I can describe the two is that the 991.2 is a better car but the 991.1 is the better 911. I think Porsche will sort out the turbos in the new 992's and may be even before that in the 2018 or 2019 991.2's. But for now, the 991.1 is definitely the more responsive car when it comes to the motor.

Dewinator

Yep!

Noah Fect

Not like an NA engine would respond any better to that sort of treatment.

sexfiend

Lease a 991.2 now, perfect timing for the 992

Valvefloat991

Actually, it would. While a 991.1 can produce less maximum torque at 1500 rpm than a 991.2, if you floor the throttle, it delivers what it has in a quarter of a second or so.

On the 991.2, when you floor the throttle, you initially get less torque than the 991.1, due to the turbo engine's reduced displacement and compression ratio, and then it takes ten times as long for the turbos to spool up before the engine generates its max.

That difference between a quarter of a second and 2-3 seconds is turbo lag.

4pipes

In either case, 1500rpm in 7th, you'd be lugging the engine at full throttle......something Porsche would caution you about.

Valvefloat991

Hardly, the lugging limit for a six-cylinder engine is 1000 rpm. Even 4-cylinder engines are good to 1500 rpm at full throttle.

Porsche publishes power and torque curves for the 991.2 starting at 1250 rpm. Do you that the company did that because they didn't want anyone employing such rpm?

4pipes

Whatever......I don't do it with my MT 991.2.

Noah Fect

I like my connecting rods right where they are, thanks.

The old-school rule was always "No floorboarding the car below 1/3 redline." Nowadays I can see extending that guideline to redline/4, maybe... but no lower.

randr

If you drive in the correct gears there is no discernible lag - if you drive in 7th gear at low revs you can prove there is lag (or any lugging gear), because all turbos have some level of lag. The only place you find it being endlessly debated is on the internet, seriously its non-issue The engine response is just as good as that found in the 488GTB.

kayjh

I'm sorry but I don't agree. The NA engine doesn't make anywhere near the torque the 99.2 engines do at 1,500 RPM and the time difference between 1,500RPM and 4,000 RPM where the torque and HP come alive is much greater than the .5sec of lag you'd feel in the 991.2.

Not really a real world test anyway because who would ever step on the gas at 1,500 rpm in 7th gear anyway.

If you drive both cars you'll find that the NA engine is more entertaining from 4,000 - 5,500 RPM, but below that the tiny lag penalty of the 991.2 engine is almost unnoticeable and by comparison a much better engine for everyday driving.

Valvefloat991

I have driven both cars and I understand what you are saying, but you don't seem to comprehend what turbo lag means. It is the delay between when you floor the throttle at a given rpm and when the engine actually develops maximum output at that SAME rpm. The magnitude of that maximum output is irrelevant.

Clearly, the 991.2 has virtually no turbo lag at 4000 rpm+ and considerable turbo lag below 2000 rpm. And while you might consider flooring the throttle below 2000 rpm in top gear to be absurd, I again point out that Porsche publishes a full-power output curve for the engine starting at 1250 rpm.

Moreover, since the turbo wastegates on the 991.2 are computer controlled, if Porsche felt that producing full power at low rpm was harmful to the engine, it would be an easy matter to limit boost until whatever rpm was determined to be safe for full boost. You might ponder the fact that Porsche has not done this at all.

Perhaps I'm an outlier here, but when I'm driving in my 991.2 in town, with low speed limits, traffic, and no opportunity to go quickly, I don't spin my engine at 5000 rpm just to make noise and wear it out more quickly. And I have been known to floor the throttle at considerably less than 1500 rpm if I need a little acceleration and will downshift if I want a lot of acceleration.

My previous car, BMW 335i with manual transmission, was subjected to full throttle at as little as 1000 rpm in sixth gear for some 50,000 miles and showed no ill effects.

Of course, the beauty of a manual transmission is that you can drive your car your way and I can do the same with mine.