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YOUR RESEARCH996 4S exhaust/engine note at parking speeds
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Suggestion · Original poster
When maneuvering at parking speeds, the engine note changes substantially to a note that i can only compare to if it had a sports exhaust fitted.
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Suggestion · Original poster
is this normal - does the engine mapping change when on load at these low speeds?
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Hi
I've just picked up a 2002 996 4S, without sports exhaust.
When maneuvering at parking speeds, the engine note changes substantially to a note that i can only compare to if it had a sports exhaust fitted. is this normal - does the engine mapping change when on load at these low speeds?
Thanks
Gareth.
Are you sure you don't have sport exhaust? Some of the early 996 cars had the OEM sport exhaust system without a button on the dash to deactivate it like the later cars and the current cars.
I thought there was one at
http://www.autoatlanta.com/
.
I haven't used it, but I believe others on this board have. You can also contact Loren if you're a contributing member of
www.renntech.org
and he can help you with this.
I think that was on 1st gen 996's with the 3.4l engine. I don't believe that any of the factory PSE equipped C4S's would have shipped without the switch.
But I could be wrong.
That could be the case... I'm not really sure. I think the VIN check should provide the answer.
If he doesn't have sport exhaust, what else could it be? Perhaps some kind of aftermarket exhaust?
Maybe a PSE that was dealer installed without the switch? But the fact that it apparently has the speed actuation for euro noise regs between 50-70kph means that it is somehow wired in. Could someone have installed the PSE system from a 3.4?
The renntech online decoder is very basic. For a list of options, you have to email Loren. I think you may be able to get this by emailing the VIN to the folks at
www.suncoastparts.com
also.
Well, there's our answer!
This intrigued me enough, that I search all the emails I had 6 years ago when I was looking for an 2002 or 2003 C4S. Sure enough, there was on that the owner claimed had the factory PSE, but the dash had no switch...I don't think I believed him at the time.
Here's what that looks like to me:
C07 ?
XJB Rear section of center console painted silver (arctic silver for the 996 color code 92U)
X71 Aluminum painted instrument dials
X97 Aluminum/leather shift ****
X98 Aluminum/leather parking brake handle
288 Headlight washers
601 Litronic headlights (non-Turbo)
662 PCM (Porsche Communication Management) navigation system
692 Remote CD changer (6-disc)
It doesn't look like you have OEM sport exhaust. It must have been added later. I can't tell if you have it from the photos.
C07 looks like a country code. It appears to be Italy.
The code for the PSE is XLF.
'tis an Italy car initially - good spot ;-)
am sure there's no sports exhaust - just pleasantly pleased at the raspy/burbly note at low speed :-)
thought the 4S had a few of those options as standard - 601/662/692 - glad i've got them. what's the difference between litronic on a 4s and a turbo???
Would need to see pics from underneath the car pointing up the exit side of your mufflers to tell. Those pics only show the exhaust pipes
My car is super quiet when the PSE is turned off. I don't know if PSE off is exactly the same as stock exhaust but it doesn't sound burbly at low speed at all. It sounds more like a Mercedes
The turbo headlights have a smooth silver finish while the C4S headlights are "ribbed" between the lights.
My C4S was raspy when I had my stock mufflers, but now that I have Fisters installed it's much more raspy and brubly...
I never thought mine sounded bad when it was stock.
