John Boggiano

I know, I know... even I'm rolling my eyes at the thought of this topic once again, especially as I really ought to know the answer.

Is this all it does..?

1. Fills in some of the lower range of the torque curve
2. Slackens the TC threshold a little
3. Bypasses the secondary silencers at all revs

Does it also sharpen the throttle response, or 'move' the throttle actuation curve a little?

mooty

that is what i thought i does.
unless others got more info.

oh yea

Does the sport button alter suspension at all? I know PASM does

OldGuy

I thought (the way my car sounds) it opens the exhaust sooner not right away?
I dont mind revisiting this seems like I dont know either

Edwin

My exhaust sounds different at idle with the sport on (a bit thicker sounding). But the big change comes at 4K rpm.

99firehawk

diffrent depending on which car we are talking about
and with which transmission

OldGuy

There is only one car here- the GT3 and the GT3RS have the same motor and the same tranny


Yep the big noise is at 4K RPM

340Elise

That is about right. I believe you actually get 18 ft lb torque more at some rpm. The suspension is changed with a different button I believe. As for throttle; that is what it does on lesser 997's, not sure about the GT3.

BG

Attached is a Word document taken from the 2007 Porsche GT3 Technical Introduction Booklet that explains the Sport Button functions.

leif997

does disabling the sport wire(as mentioned on other threads) have any negative effect on the above mentioned functions? I disconnected it and it sounds great the whole way through the RPM range, yet I wonder if I am causing some unseen issues by doing so...

anyone with ideas on this???

NoSubEDU

While I haven't been able to drive my GT3 yet, I can at least speak about what it did on my 997 C2S.

Hitting the SPORT button would also activate the SPORT setting on PASM, but that could be turned off.

The SPORT button would:
1) Activate the bypass on the exhaust, which could be heard at idle. The noise restriction of closing the bypass under hard throttle up to about 50 mph was still activated, but you could certainly tell when the bypass was released at 50.
2) Would shift the throttle sensitivity curve. Where as before 15% throttle would get 15% gas, now 15% throttle would get 35-40% gas. (much more sensitive)
3) Would reign PSM back a notch.

NoSubEDU

I pulled the connector on my C2S and didn't have any issues. It just disconnects the bypass.

Only reason we have it is for Euro noise restrictions below 50 kph.

John Boggiano

Thanks, BG.

Frustratingly, that linked document seems to imply improved throttle response, but doesn't actually come right out and say it.

I guess the 'basic functions same as current 911 generation' is as good as I'll get on that one.

BG

Yeah that quote is a bit confusing. I wonder if the GT3 owners manual gives a better description. I should have mine in a week or so, I'll check it.

mrpc12

Also, what is the consensus on the use of the sport button?

Do you always turn it on every time you start the car? Do you turn it on once in a while? Just curious what people other are doing.