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Exhausts Leak?

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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHExhausts Leak?

Leading reported evidence

Test several exhausts systems

Performed · outcome unconfirmed

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Read a import magazine where they tested several exhausts systems on same car and did a cat-back bypass(no exhaust) and results were very small(matter of 1-2 hp).
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Exhausts Leak?

Frequently discussed work

Run much shorter exhaust length by not crossing the pipes

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Suggestion
I wonder if you can also run much shorter exhaust length by not crossing the pipes.
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Exhausts Leak?

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Leading evidence: 'Test several exhausts systems' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run much shorter exhaust length by not crossing the pipes' (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.

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Run much shorter exhaust length by not crossing the pipes

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Suggestion
I wonder if you can also run much shorter exhaust length by not crossing the pipes.
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Exhausts Leak?

Test '

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion · Original poster
1) This might sound silly but I smtms do a 'leak test' on my cars to see if their exhausts are leaking air from some hole or joint..
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Exhausts Leak?

Frequently discussed actions (3)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Run much shorter exhaust length by not crossing the pipes

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
I wonder if you can also run much shorter exhaust length by not crossing the pipes.
Original post Read captured discussion
Exhausts Leak?

Test '

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
1) This might sound silly but I smtms do a 'leak test' on my cars to see if their exhausts are leaking air from some hole or joint..
Original post Read captured discussion
Exhausts Leak?

Test several exhausts systems

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
Read a import magazine where they tested several exhausts systems on same car and did a cat-back bypass(no exhaust) and results were very small(matter of 1-2 hp).
Original post Read captured discussion
Exhausts Leak?

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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.

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

Rennlist: 1 discussions

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Generation: 20261026T155324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

1) This might sound silly but I smtms do a 'leak test' on my cars to see if their exhausts are leaking air from some hole or joint.. usually, i keep the engine at idle and just plug shut the exhaust outlet to build up pressure OR there is any leak which i can hear from the pipes under.. This works great with my 928 but when i try it with the 996 (shutting both outlests) the car doesnt build up any pressure.. does it mean my exhausts are leaking somewhere? 2) Is it possible to bypass the cats in the 996? We have no regulations here about that, and most probably our fuel is Leaded.. Sooner or later, i know they'll clog. What should i do? Moreover, is it true the car gains a few horses and newton-meters while bypassing cats?? Wael 996C2

POST 2Original post

Don't know, but I am curious about the results of that race you were suppose to have with the M5.

POST 3 / ORIGINAL POSTEROriginal post

Gretch, he didnt show up, the bugger!! Ok, here go, i am posting a new thread now.. read it and enjoy! wael

POST 4Original post

Maybe for force fed cars ie turbo'd ones that need less restriction to gain more noticeable power but NA engines benefits would be neglible if any. Read a import magazine where they tested several exhausts systems on same car and did a cat-back bypass(no exhaust) and results were very small(matter of 1-2 hp). Mite sound better though. Regards. Mike. Mite be different for full spec racing engines though.

POST 5Original post

Yeah there are cat bypass pipes available. Fabspeed makes some, but the website doesn't have much info on the 996 ones: <a href="http://www.fabspeed.com/catbypass.html" target="_blank">http://www.fabspeed.com/catbypass.html</a> Without regulations, I would certainly like to hear the cat AND muffler bypassed! I wonder if you can also run much shorter exhaust length by not crossing the pipes. I assume they are crossed like that so that they heat each other's cats up, but I may be wrong.

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