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911uk

Engine/exhaust boom C2 Cab

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3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHEngine/exhaust boom C2 Cab

Leading reported evidence

Replace even these

Performed · outcome unconfirmed

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 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 · Original poster

Even these were replaced FOC by Dansk but to no avail.

Original post Read captured discussion
Engine/exhaust boom C2 Cab
Frequently discussed work

Check several times and have gone

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
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.

Suggestion · Original poster

I've had what sounds like a blowing exhaust from day one when the engine warms, had the exhaust checked several times and have gone to the expense of fitting Dansk sports silencers which have, if anything, made things worse.

Original post Read captured discussion
Engine/exhaust boom C2 Cab
Read full discussion summary

Leading evidence: 'Replace even these' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check several times and have gone' (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.

Read captured replies

1 matching discussions · 3 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Check several times and have gone

Suggestion or failed attempt

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 contain suggestions
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.

Suggestion · Original poster

I've had what sounds like a blowing exhaust from day one when the engine warms, had the exhaust checked several times and have gone to the expense of fitting Dansk sports silencers which have, if anything, made things worse.

Original post Read captured discussion
Engine/exhaust boom C2 Cab

Replace so drastically once the engine warms up

Suggestion or failed attempt

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 contain suggestions
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.

Suggestion · Original poster

Can anyone enlighten me as to why the exhaust tone changes so drastically once the engine warms up to running temp?

Original post Read captured discussion
Engine/exhaust boom C2 Cab

Replace when the engine has warmed

Suggestion or failed attempt

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 contain suggestions
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.

Suggestion · Original poster

I've been told that the fuel/air mixture changes when the engine has warmed, but I wouldn't have thought it was a factory acceptable standard to let 911's out with excessive boom.

Original post Read captured discussion
Engine/exhaust boom C2 Cab

Run sound reverberating off the fencing and walls is hideous

Suggestion or failed attempt

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 contain suggestions
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.

Suggestion · Original poster

When reversing back into the drive after a run the sound reverberating off the fencing and walls is hideous.

Original post Read captured discussion
Engine/exhaust boom C2 Cab
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.

Check several times and have gone

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
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.

Suggestion · Original poster

I've had what sounds like a blowing exhaust from day one when the engine warms, had the exhaust checked several times and have gone to the expense of fitting Dansk sports silencers which have, if anything, made things worse.

Original post Read captured discussion
Engine/exhaust boom C2 Cab

Replace even these

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 · Original poster

Even these were replaced FOC by Dansk but to no avail.

Original post Read captured discussion
Engine/exhaust boom C2 Cab

Replace so drastically once the engine warms up

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
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.

Suggestion · Original poster

Can anyone enlighten me as to why the exhaust tone changes so drastically once the engine warms up to running temp?

Original post Read captured discussion
Engine/exhaust boom C2 Cab

Replace when the engine has warmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
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.

Suggestion · Original poster

I've been told that the fuel/air mixture changes when the engine has warmed, but I wouldn't have thought it was a factory acceptable standard to let 911's out with excessive boom.

Original post Read captured discussion
Engine/exhaust boom C2 Cab

Run sound reverberating off the fencing and walls is hideous

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
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.

Suggestion · Original poster

When reversing back into the drive after a run the sound reverberating off the fencing and walls is hideous.

Original post Read captured discussion
Engine/exhaust boom C2 Cab

Run temp

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
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.

Suggestion · Original poster

Can anyone enlighten me as to why the exhaust tone changes so drastically once the engine warms up to running temp?

Original post Read captured discussion
Engine/exhaust boom C2 Cab
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.

3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • 911uk: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T031046Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Can anyone enlighten me as to why the exhaust tone changes so drastically once the engine warms up to running temp? I appreciate that the Cab top will magnify the tone, but even with the hard top on it just doesn't sound right. I've had what sounds like a blowing exhaust from day one when the engine warms, had the exhaust checked several times and have gone to the expense of fitting Dansk sports silencers which have, if anything, made things worse. Even these were replaced FOC by Dansk but to no avail. I've been told that the fuel/air mixture changes when the engine has warmed, but I wouldn't have thought it was a factory acceptable standard to let 911's out with excessive boom. When reversing back into the drive after a run the sound reverberating off the fencing and walls is hideous. Seriously thinking of putting the original silencers back on and e-binning the Dansk system. What checks would an Indy specialist do to determine any underlying causes?

POST 2Original post

that is very odd have you had the Cat inspected ? how many miles do you have

POST 3 / ORIGINAL POSTEROriginal post

Its a 2001 and just turned 34k, been used as a town car for most of its previous life. I had a similar situation with a Boxster, but not to this extent. As I said it's been checked over several times and there are no clamp or manifold leaks, but its just too big a change in tone to be normal. Other than emissions, what checks can be done on the cats?

This is a source reference. Confirm exact model applicability in the original material.