I have a lifelong (I'm 69) habit of double clutching and rev matching on downshifts. It is easy and correctly performed on all my cars (E90 M3, M Coupe, WRX, 997.1 GT3), but for some reason I can't seem to get it quite right on my newly acquired 997.2 GT3. There seems to be a short delay/disconnect when I blip the throttle. Without near-instantaneous response, which I am not getting, the downshifts are neither smooth nor precise.

Car has 23K on it and otherwise drives beautifully. Well executed rev-matched downshifting is one of pleasures of a manual, so I wish to address this. Maybe its me and I'll just become used to the new car, but this split second delay just does not feel quite right.

Is there anything mechanical or electronic that can be checked pertaining to this. TIA for any advice.

Mike

 

It's not you. They're all like that. Drives me nuts. Had it fixed in my '08, now own '10. Sending ECU off to aftermarket soon to correct in addition to other improvements.

Rennlisters... recommendations?

 

Thank you for response. Wish it wasn't so, very irritating. Please share any results. Maybe some others can share experience too.

 

An 08 GT3?

My 07 GT3 has no delays. No problems with throttle delay. Maybe the previous owner changed played with the ECU.

 

Entirely possible, only the initial stab for heel/toe.

 

i have several gt3's (7.1 and 7.2)...none have any particularly troublesome throttle lag...they rev match fine for me

 

^ Same here. Multiple generations of GT3 ownership, never had a single issue with any throttle lag. If anything the near-instantaneous throttle response is a key selling point of these cars...

ECU programming is the first suspect.

On the mechanical side, with PIWIS plugged in your tech can see how quickly the throttle butterflies are reacting to pedal input. Compare that to a known sample to determine if you have a "slow" throttle body. Then there are two butterfly valves inside the intake distributor that shape airflow across the rev range--doubt that's the cause of your problems but still a possibility.

 

Hmmm...mine is terrible. Turbos react faster.

 

I noticed it too with mine.. There is a delay, especially just hitting the throttle enough to rev match (blip)..

I was told ECU flash helps this

 

I have a 996-3 and mine is perfect, but it did come with a Lt Wt flywheel clutch kit. You may want to consider re setting the throttle. I know it can be done on the 6-3, not sure about the 7-3. Im not sure of the procedure off hand, but Im sure it can be searched for here easily enough.

 

owned every GT3 variant, none had issues described. you should have a tech look into your particluar car.

 

As one who has blipped the throttle on millions of downshifts since the mid '60's, I find the throttle response on our '07 GT3 just fine, so perhaps you can compare your car's response to others in your area to see if your perception is actual. As for a possible remedy if so, I have no idea how to correct the problem.

all the best....

NV

 

I too have been throttle blipping for years, not only in the GT3, but motorcycles, race cars and many P-cars
I Have never felt this delay, except in my wife's Audi A6 which is much worse.
I will be sending my ECU for a flash as they advertise this problem will be effectively gone. By virtue of them writing an algorithm to fix this, verify's this problem does indeed exist. It may not be prevalent in all cars, but there are a few issues with some cars.
My C2S was a dream to rev match, no delay.

 

07 GT3 here and no delay. My car does have LWFW.

 

All? I've never heard of this been an issue?