Probably not super helpful, but my '09 with bigger turbos and a tune (@20K miles) does not do this.

 

3 years on and many $, tunes, and diverters later the "Blip" has still not been solved on my car. It happens on stock cars, so it's not the tune. Porsche NA doesn't want to know about it merely saying "It's a feature of the car". Well, it wasn't a feature for the first 10 years and 30,000 miles I owned the car. At this point, I just give up and live with it.

 

Funny.... reading this and I just assumed driver error on my part the couple times it's happened, but it's scared the **** out of me as both times in 4th going to 5th WOT near the redline. (RPMs rapidly climb after clutch disengaged and I swear I'm completely off throttle) It confused me both times cause I didn't feel like driver error.

Definitely not regular when driving similarly, which is why I chalked it up to error.

It does seem like stuck open throttle body for a fraction of a second.

Glad to hear this is sorta common (mostly because it makes me feel less dumb) but maybe not great if still no consensus diagnosis.

 

Probably not the most useful reply but I do recall my 2008 GT2 doing this type of over-rev consistently with what I believe to be the stock clutch. Now I have a 'Franken-clutch' built to replicate a GT2 RS setup (Sachs and OEM parts used), and I'm not sure the car does this anymore. I also had a significant engine out service in fall of 2020 at the same time, so if the problem is gone now it may be hard to say exactly what resolved it. I am confirmed on stock tune though, and will see if this happens next time I go for a spirited drive.

 

Interesting. Curious if other owners with LWFW's have had similar experience? I'm planning on doing my clutch/FW when the engine comes out. Would be a nice side benefit if true.

 

I addressed diff (replaced with Guard) and clutch (single mass, 4.0 setup) while doing an engine out to try addressing the throttle overshoot issue. We replaced, plugs, wires, coil packs, various sensors, checked for vacuum leaks. We couldn't find anything and the "problem" persists. I've only been able to mitigate this by a) shifting at lower RPMs and b) shifting slower, being very mindful of pedal positions while shifting. The issue with (b) is a single mass flywheel demands a faster shift before revs drop.

 

Must be the GT2 specific ECU, this is about the only thing standard on my engine and it still does it, see vid in initial posts

 

My 2008 does this too. GIAC tune. All 3 tunes do it as well. 17k miles.

 

Came across this video which accurately depicts the discussed issue. Skip to the 43 second mark

 

Nope. I have a had Sachs clutch and single mass LWFW and it still does the "Blip"

 

I don't buy the ECU theory, as mine didn't start doing it until about 30,000 miles. I've owned it since 3,000 miles. Now 46,000

 

just got back from a club drive today and it happend to me. Its not consistent. stock turbos and diverters. Single mass LWFW.

its does feel like the car has not yet received the message that my foot is off the gas, because it definitely was.

i would buy into the theory that it could be a bad or slow to respond throttle pot. That feels like a plausible explanation based on how it felt.


Edit:
Interestingly, the original accelerator pedal sensor 997-423-021-02 has been replaced by 997-423-021-03. Seems people have swapped out all sorts of other components but not this, so I went ahead and ordered one.

 

Interesting....def curious if that resolves the issue. The problem for me is that it's only happened twice in the year I've owned it, or at least only twice where I was driving aggressive enough that it was obvious. Feels like a long "test cycle" to know if this is the solution.

 

@mchrono did you swap out the sensor. If so, any verdict?

 

FWIW, after my car returned from Sharkwerks with everything updated (all new hoses, plugs, etc) and a new LWFW and clutch, the hang is still there but not quite as bad. It seems to drop a little bit faster.