Exhaust Flaps
#2
Banned
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They are open the way you show them in the picture (meaning in sport mode). They are naturally open and are closed under vacuum.
Hope this helps. If you need interior shots of the valve within the exhaust piping, I can provide that for you.
Hope this helps. If you need interior shots of the valve within the exhaust piping, I can provide that for you.
#5
Banned
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If not movement then make sure the rubber vacuum lines nre connected to each of those round drums. If so, then you may want to trace the vacuum lines and see if they are plugged in at the source. Finally, there is also an electrical connection to check on the right side of the engine bay. You may need to do a search to find info on its exact location.
If it is plugged in, then check your fuse box!
Or you could just go with straight pipes and get ride of all three mufflers and over 50 lbs of weight in the process. The sound? Yeah it's a bit loud, but better than any other exhaust that I have ever heard. Think of it as the Sharkwerks center delete on steroids, lots of them!
#6
Racer
Thread Starter
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Thanks for the good info. I have been driving the car for the last 6k miles with the flaps stuck open and it's not too loud for me. I have a Sharkswerks center by pass pipe. Will I loose power if I by pass the side mufflers?
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#8
Racer
Thread Starter
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Yes that was my car on the side of I-95. I let a friend drive; we were getting a warning for no front tag. Omar got FTD at a resent Autocross.
When the exhaust flaps are open, does the engine exhaust by-pass the side mufflers completely?
When the exhaust flaps are open, does the engine exhaust by-pass the side mufflers completely?
#9
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Jon - Are they actually "stuck" open as pointed out (car off). Mine have done that a few times. I just grabbed the rod and moved it up and down a few times to free up the movement.
#10
Racer
Thread Starter
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When the side flaps are open the exhaust does bypass the side muffler almost completly. For me, why keep the side mufflers if I have never used them in the past? I'm going to try the Fabspeed side muffler bypass pipes. I love weight savings too.
I found this video that shows how the stock 997 GT3 exhaust system works.
http://www.youtube.com/watch?v=J0Q5Szx021s
I found this video that shows how the stock 997 GT3 exhaust system works.
http://www.youtube.com/watch?v=J0Q5Szx021s
#11
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I found this video that shows how the stock 997 GT3 exhaust system works.
http://www.youtube.com/watch?v=J0Q5Szx021s
http://www.youtube.com/watch?v=J0Q5Szx021s
#12
Racer
Thread Starter
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The exhaust note from the Sharkwerks 997 GT3 Bypass pipe is worth every penny!!!
I have since lost my great exhaust note by installing Fabspeed Side Muffler Bypass pipes. The Fabspeed pipes do save a good deal of weight, but they don’t have a Cup Car exhaust note. The Fabspeed Side Muffler Bypass pipes sound a little louder than a stock 997 GT3 with the sport button depressed.
Weight or Exhaust note
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Weight or Exhaust note
![banghead](https://rennlist.com/forums/graemlins/banghead.gif)
#13
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the Sharkwerks 997 GT3 Bypass pipe is worth every penny!!!
Surely this is why I the GT3's have tilting sunroofs, if I close it the rear exhaust sound is not quite as crisp :-).
I have'nt remembered to change my 1 CD since I bought the car over a year ago and I seem to have no FM radio reception on my 9 mile daily commute.. I do drive by a big hospital..