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997.1 Sport Exhaust Note

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Old 03-27-2023, 04:10 AM
  #31  
maiko
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Originally Posted by TerrestrialFlyte
The actuators are tucked up with the mufflers. That looks like the cable at a glance but I’m not sure since mine was unplugged by the previous owner and I left it like that.
All true but he is looking for the controller or solenoid to unplug the electrical connection. The actuators are mechanical and have a vacuum connection.
Old 03-27-2023, 09:14 AM
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srb1194
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The vehicle has the sport chronometer package on the window sticker. Maybe I need to take another picture for reference? I'm certain it wasn't an add on.
Old 03-27-2023, 09:33 AM
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Simply unplug connector and you are all set.
Old 03-27-2023, 09:50 AM
  #34  
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Thanks. I'll take another look.
Old 03-27-2023, 11:30 AM
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Originally Posted by srb1194
The vehicle has the sport chronometer package on the window sticker. Maybe I need to take another picture for reference? I'm certain it wasn't an add on.
in 2007 "sport exhaust system" was a $2,400 "exclusive option", separate from "sport chrono package plus" which as a $920 "option" (separate column from the exclusive options)
Old 03-27-2023, 11:34 AM
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Even if it were installed aftermarket, the valve should be in the same location -- and it is clearly not there in your picture. Best thing is to find and trace the braided/shielded vac lines from the mufflers.

Last edited by maiko; 03-27-2023 at 11:45 AM.
Old 03-27-2023, 11:36 AM
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So here's the window sticker. I know it has the button and there's certainly a difference when you press it. I do not see the option you're referring to though.
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Old 03-27-2023, 11:43 AM
  #38  
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I checked your photo album, and it looks like you have the standard exhaust (equal size tailpipes -- compare to tailpipes in my video). The change in sound you're hearing is likely from the disabling of the intake resonator in "sport mode" and should be minor indeed.
Old 03-27-2023, 01:51 PM
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Originally Posted by maiko
I checked your photo album, and it looks like you have the standard exhaust (equal size tailpipes -- compare to tailpipes in my video). The change in sound you're hearing is likely from the disabling of the intake resonator in "sport mode" and should be minor indeed.
You are correct. Looks like I'm out of luck on changing the exhaust note without spending some money. Thanks for your input.
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Old 03-27-2023, 02:37 PM
  #40  
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Originally Posted by srb1194
You are correct. Looks like I'm out of luck on changing the exhaust note without spending some money. Thanks for your input.
It may be the angle, but your tips look a little low. That could be a symptom of worn motor mounts. Relevant to this topic, replacing my motor mounts with RS mounts (aside from the transformational handling benefits) brought more engine sound (and feel) into the cabin. Might be worth considering.

edit: these are the mounts i went with: http://www.carnewal.com/products/996;997;987/p96189/RS-Motor-Mounts-for-996-997

Last edited by maiko; 03-27-2023 at 03:35 PM.
Old 03-27-2023, 02:41 PM
  #41  
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Originally Posted by 997.one
I think the real issue is the sound from inside the cabin. I have a catless x pipe and equal length headers but driving along at normal rpm’s, it’s really quiet inside the car. Even when I get on it, it can be very loud outside the car but I am still surprised how much sound is lost inside. I assume it’s the fact that everything is behind you… I would like more cabin noise myself but there isn’t way to go louder without it sounding bad for others. Rear seat removal DID help a bit. I may also remove some sound deadening behind the carpet.
Good point. I cant find it now, but theres a fairly detailed post on someone installing a 991 sound symposer in a 997. Also, see my post above re motor mounts.
Old 03-27-2023, 02:57 PM
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Just out of curiosity what is the normal mileage lifespan on the motor mounts? This car has been in storage most of its life. I'm at 26K on the odometer for reference.
Old 03-27-2023, 03:08 PM
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Originally Posted by srb1194
Just out of curiosity what is the normal mileage lifespan on the motor mounts? This car has been in storage most of its life. I'm at 26K on the odometer for reference.
It's age and mileage, your engine is siting on rubber bushings, over time and mileage they droop. I swapped mine out on both cars, with both of them being less than 20K mileage and saw a difference of 1/4"+ between new and used.

Its an easy project if you can wrench, or a good starting point if you are new to working on the car.


2008 997 19K


2006 997 15K




Old 03-27-2023, 05:02 PM
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That's what's great about this forum, Education! Although I thought I was going to get a free enhancement now I need to consider this maintenance item. I am pretty handy with certain types of repairs but I probably will just add this to my next shop visit.

Thanks again
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Old 03-29-2023, 06:21 PM
  #45  
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Originally Posted by maiko
It may be the angle, but your tips look a little low. That could be a symptom of worn motor mounts. Relevant to this topic, replacing my motor mounts with RS mounts (aside from the transformational handling benefits) brought more engine sound (and feel) into the cabin. Might be worth considering.

edit: these are the mounts i went with: http://www.carnewal.com/products/996...ts-for-996-997
I have one follow question and I think that'll do it. How do engine mounts effect interior sound levels? I'm puzzled by that statement. Thanks again!


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