I've never noticed any lag in my 718 CS or any drop off at top RPMs. The pickup from stand still is insane - and blows away the 981. And it revs out and keeps pulling all the way to redline.


I think they are just jealous!

 

Me myself can feel the drop of of power above 6500 and dyno charts confirm it.
If you have the SC package, do a launch Control and the pdk in auto mode and you will feel it.
And i dont really care about it, i shift at 6500rpm and i do so with a big smile


A pdk in manual mode and normal driving mode the turbo kicks in around 2500rpm.
So if your in third gear and under 2000rpm and your floor the gas nothing really happens at first.
But thats not the way to drive sport car anyways......


In sport/sport+ you dont notice it as much. since the ecu maps the turbo in a different way.
(sport have a different mapping on the gas pedal that can be mistaken for turbo lag)
In sport+ the turbo always have a smal boost


So it depends how you drive it, treat it like a sports car and there is no lag if you ask me.

 

Maybe my understanding differs and maybe someone will correct me.


It seems to me that there is a difference between the lack of power at low RPM and Turbo lag.


As you know, many engines, even naturaly aspirated , have a lack of power at low RPMs. On the other hand, Turbo lag is simply the time that the tubine takes to reach its full speed.


My understanding is that at low RPM (less than 2500 RPM) my 718CGTS simply has less power. I don't thik it has someting to do with Turbo lag.


And then, those who express the opinion that the engines of the 718 have little power below 2500 RPM, do not know to what extend nothing happens below 4500 RPM when driving a 981 (base, S or GTS).


Today, I drove a friend's M2 and he drove my 718. He could not believe the absence of Turbo lag on my car. Personally, I find that above 3000 RPM my 718 feels like a naturaly aspirated engine.

 

My take is that there is no value in revving beyond 4500 rpms until higher speeds, where hp is needed to push through the air resistance. Shifting any gear at 4500 rpms keeps the engine above 2000 rpms in the next higher gear. This is the max torque range. If you go above 4500, torque drops off and therefore maximum acceleration is not achieved. I haven't yet fully incorporated wind resistance into my calculations but will post if I get that far.
Thoughts?

 

I am with you on this and its how i usually do when i want to gain speed quickly when passing or just for the fun of it.
But that does not mean i dont dont rev it higher, it depends on how fast i want to gain speed.
If there is alot of curves i try to keep it in wider band.

 

<snips>I've read many reviews by journalists who should know what they're talking about

I'm curious if anyone else here has wondered about this, or has a theory explaining what's going on.

I think the basic explanation is two-fold.

1. The emphasized line above contains that NASTY word "should". It's amazing how often "should" proves to be "don't".

2. The power delivery IS different from the previous models and seat-of-the-pants evaluations are rife with problems.

I have to keep reminding myself that motoring journalists are in the business of entertainment and selling advertisements, and what really matters is MY experience.0

 

I haven’t done the 981 v 718 comparison but I have done the 987 v 718 because I still own both.

The 987 begs to be kept above 4000 rpm when you shift...thus you NEED to push the car up to >6000rpm before the down shift so you don’t get a drop off in torque. The 718 however can be shifted much lower down on the rpm range. Peak torque at 2000 rpms gives you the luxury of downshifting earlier. I do feel a bit of a drop off in my 718 above 6000 so I usually end up downshifting.

The other issue is the 987 having lower torque and being slower takes longer to climb in revs. The driver gets to enjoy the sound as it climbs. I find the 718 is so fast that, I am picking up rpms faster and shifting faster....no time to enjoy the symphony if I am strictly trying to pick up speed.

If the 981 graph is similar to the 987 then I would say it tells me what I feel.

I don’t feel any turbo lag. I also don’t spend a lot of time below 2000 rpms. It’s a sports car, not a family sedan.

( I am comparing my 987.1 Boxster S to my current 718 Cayman GTS)

 

Yup.
Peak acceleration is at peak power--so keeping the revs in the power band 5.8 thou to red line would give the best result.
That would make me illegal at the top of 2nd gear!

 

Yup.

That would make me illegal at the top of 2nd gear!

This is so true. Two weeks a go I was out for a spirited back road drive. Ended up with a Carrera GT in front of me and a Ferrari 458 behind me. We are all doing 55-60 (speed limit 35) on a twisty and I'm just thinking. "Are those guys having more fun than me?"

Kind of makes it hard to have higher aspirations when we are all stuck in second gear. On the other hand, I will take the 718 to the track for a beating. Just not going to do that with most other "dream" cars.

 

You can not see turbo lag on a dyno chart. Turbo lag is more how long it takes boost to build up when you press the throttle at a certain point in the revrange.

 

Seems like a good place to leave this:

When most people say "turbo lag," what they are really referring to is "boost threshold"

 

It might be a good idea to repost this pic, difference between the driving modes.
First posted by @Black718 from this thread https://www.718forum.com/forum/2017...orsche-718-general-discussion-forum/5578-718s-versus-base-718-sport-chrono.html


The difference in max power (338.25/Normal, 340.08/Sport Plus+Sport Response, 339.46/Sport Plus) is insignificant. You can see that the torque lines keep crossing themselves so I don't see much difference once full boost is achieved at ~2700RPM.
Interesting that on this graf the drop above 6500rpm does not show....

 

And 981 S, also from Cobb