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De cat - Page 1 - Boxster/Cayman - PistonHeads UK

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2 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHDe cat - Page 1 - Boxster/Cayman - PistonHeads UK

Leading reported evidence

Run dyno tests

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Unsuccessful attempts: 1
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Suggestion
Unless you are prepared to run dyno tests before the modification, establish a baseline of performance, and fueling, etc., then make the mod and do the dyno tests again to ensure things are better than they were before and the engines fueling is acceptable.
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De cat - Page 1 - Boxster/Cayman - PistonHeads UK

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Leading evidence: 'Run dyno tests' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run dyno tests' (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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1 matching discussions · 2 captured posts examined · 1 partial discussions

Frequently discussed actions (1)

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

Run dyno tests

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
Unless you are prepared to run dyno tests before the modification, establish a baseline of performance, and fueling, etc., then make the mod and do the dyno tests again to ensure things are better than they were before and the engines fueling is acceptable.
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De cat - Page 1 - Boxster/Cayman - PistonHeads UK

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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.

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

PistonHeads: 1 discussions

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Generation: 20261026T074343Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

What's the performance gains after de cat on a 987 3.2s any ides?

POST 2Original post

porschecrazy321 said: What's the performance gains after de cat on a 987 3.2s any ides? Probably not as simple as just removing the converters. The engine is tuned, so to speak, with the expectation the converters are there. Valve timing both at the cam lobe and the adjustment offered by the variable cam timing feature both implemented with a certain amount of back pressure. While there might be a small gain at some RPM range at others the engine may not be as good with the converters removed as it was with them present. There is also the issue of the DME attempting to fuel the engine in order to get the readings it expects/needs from the O2 sensors after the converters. The risk is the engine will be not be as optimally fueled as it would be otherwise. Unless you are prepared to run dyno tests before the modification, establish a baseline of performance, and fueling, etc., then make the mod and do the dyno tests again to ensure things are better than they were before and the engines fueling is acceptable. What you need to do about keeping the DME from turning on the CEL because of the missing converters I'm not sure. With some aftermarket exhaust systems the maker offers a custom DME program to deal with this somehow.

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