Hi All,
I am shopping for a 996.2 and happened to sit in a 997S at the dealer the other day just to see the difference in interiors. I was not able to drive the 997 but I did start it and rev it for a few minutes. I was surprised how responsive the engine was as the revs dropped very quickly after each rev. It almost felt like a car with a light weight flywheel. I don't remember the revs dropping so quickly in any of the 996's I test drove.

Is this a characteristic of all 997's or just the 997S?
Has anyone else noticed this?

 

The 997.1 Carrera has the same engine (same perf specs) the 996.2 Carrera has.

 

I knew that but this was an S engine. This was a 2007 MY which I think is still a 997.1
Maybe the S cam profiles are different or something. I just don't remember the 996.2s having this kind of quick response....

 

The 3.8l 997.1 engine develops more power/torque and has more low-end torque. But you could not tell that by throttling it stopped. On the 997.1 some say the 3.6l actually is the smoother, more free-revving engine.

 

Actually he did

Nothing else to contribute... lol

 

Sport chrono plus? It does respond faster on 997.2 with it on, not sure on 997.1

 

That's actually a really good point. If you were driving an early 996 (99-01) it was a smaller engine and some of them (99-00 I think) were still cable actuated throttle bodies that might have effected fuel delivery.

Also noteworthy that the 3.6l engine (02-05 996 or 05-08 997 Base) added a harmonic balancer on the pulley side of the crank shaft. The earlier cars only used the dual mass flywheel to dampen the harmonics of the engine.

Ultimately, there is no difference in performance without physical (LWFW) or electronic (software) upgrades.

 

My bad. You are correct!

 

To the OP: Since you were stopped feathering the throttle you might also be experiencing a more responsive e-gas (which the 997.1 is vs the 996.2). It's all in the UI (user interface)... apparent responsiveness.

 

^^^^ Ahh, this is interesting. I'm not sure this is what is causing the revs to go up and down so quickly but it makes sense if there is an option to adjust this parameter.

 

The referred option Sports Chrono (SC) in Sport mode changes the throttle sensitivity. You would feel that when revs go up. I think though that the revs dropping is a more direct e-gas and not necessarily the SC setting.