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YOUR RESEARCHCan exhaust tips affect engine sound? Or might sound mean something is wrong ...
Leading reported evidence
Install exhaust system
Performed · outcome unconfirmed
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Unsuccessful attempts
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Performed · outcome unconfirmed
With 996's it can arise from bad/loose heat shields, a failed exhaust hanger, and improperly installed exhaust system, to name at least 3 things, or (in one case with my Boxster) a converter with a loose brick.
Can exhaust tips affect engine sound? Or might sound mean something is wrong ...
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Leading evidence: 'Install exhaust system' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'vibration noise' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Install exhaust system' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Replace exhaust sound although my exhaust is a cargraphic one
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
When I took out my Helmholtz resonator it changed my exhaust sound although my exhaust is a cargraphic one
Can exhaust tips affect engine sound? Or might sound mean something is wrong ...
Replace tips, and as far as i can tell
Performed · outcome unconfirmed
No successful repair reported for this finding.
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Reported fixes
0
Unsuccessful attempts
1
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Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
But what can I say, I changed the tips, and as far as I can tell, it improved the sound of my car.
Can exhaust tips affect engine sound? Or might sound mean something is wrong ...
vibration noise
Suggestion or failed attempt
No successful repair reported for this finding.
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Identified cause
1
Suspected cause
0
Reported fixes
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
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Suspected cause · Original poster
Actually, I had a look yesterday, and I'm pretty sure neither car's tips are vibrating, and I have no other reason to believe of this sound difference is due to vibration noise.
Can exhaust tips affect engine sound? Or might sound mean something is wrong ...
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Replace on your car didn't make a difference
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
If making the same change on your car didn't make a difference, then maybe my oval tips aren't quite right.
Can exhaust tips affect engine sound? Or might sound mean something is wrong ...
Frequently discussed actions (6)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Install exhaust system
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
With 996's it can arise from bad/loose heat shields, a failed exhaust hanger, and improperly installed exhaust system, to name at least 3 things, or (in one case with my Boxster) a converter with a loose brick.
Can exhaust tips affect engine sound? Or might sound mean something is wrong ...
Reported and suspected causes (1)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
vibration noise
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause · Original poster
Actually, I had a look yesterday, and I'm pretty sure neither car's tips are vibrating, and I have no other reason to believe of this sound difference is due to vibration noise.
Can exhaust tips affect engine sound? Or might sound mean something is wrong ...
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
17 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 1 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
NO CHANGE IN SOUND AT ALL (FWIW, I did not expect the swap to do so).
In particular, would there be a difference between sound with the normal ovals and the optional (Porsche/Tequipement) quad exhausts on a 996.2?
I've spent a lot of time driving two 996.2s which should be identical back-to-back, and one sounds better, more aggressive. This should be the only difference, so either it's the tips, or maybe one set of tips is loose and adds some metallic vibration noise, or it's one of the engines ... . Which is why I'd really like to figure this out - thanks!
Add me to the "no way" list. Unless, it has this:
(Put one on my dad's Mustang once, he freaked)
Funny Car Exhaust Whistle Tail Pipe Prank Joke Gag Gift YouTube - YouTube
Metal vibration noise is not a normal exhaust sound. With 996's it can arise from bad/loose heat shields, a failed exhaust hanger, and improperly installed exhaust system, to name at least 3 things, or (in one case with my Boxster) a converter with a loose brick. This knocked upon a cold start but after everything was warmed up it buzzed, made IOWs a metal vibration noise.
For the average person it is hard to near impossible to know from listening what is going on although an experienced tech can often identify what is going on. A careful inspection of the exhaust system is called for, too. Loose/damaged heat sheilds is bad enough but a buzzing converter brick can be a rather expensive problem to put right. In the case of my Boxster sourcing two good exhaust manifolds from a salvage company and having the tech install them cost me $900 in "parts" and probably an hour's labor plus any hardware like new fasteners, exhaust manifold gasket, etc.
Actually, I had a look yesterday, and I'm pretty sure neither car's tips are vibrating, and I have no other reason to believe of this sound difference is due to vibration noise. So either it's the tips, or it's the engine. I now also understand that if it's the engine, that doesn't mean there's a problem. Nonetheless, I'm hoping it's the tips. Then I know there's no problem. And I also know how to make mine sound like the other one :-)
After some experimenting (switching tips), I can confirm that tips do make a difference, and is the cause of my car not sounding as good as the other one. The Porsche double tips sound better than my standard oval tips. Not necessarily all oval tips, but my oval tips. It is not impossible that mine got a tiny bit bent from scraping the ground. I haven't noticed this from casual inspection. (The next time the car is on a lift, I'll have a closer look.) But after an incident which could have caused this, I did wonder if the engine didn't become quieter.
On the other hand, I saw a post on another forum where someone who makes after market tips said they found that tips with rolled ends sound better than tips with cut ends. Both Porsche tips have rolled ends, but on the oval tips, this roll seem flatter, more folded. So if it's not just mine and all double tips sound better, perhaps this is why.
+996. To the OP: my car (02 C2, tip) had factory oval tips and replaced them with Tequipment quad tips. NO CHANGE IN SOUND AT ALL (FWIW, I did not expect the swap to do so).
I appreciate the feedback. I know it's for my benefit. But what can I say, I changed the tips, and as far as I can tell, it improved the sound of my car. If making the same change on your car didn't make a difference, then maybe my oval tips aren't quite right.
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