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Lambda 1 Regs - Page 1 - 911/Carrera GT - PistonHeads UK

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

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YOUR RESEARCHLambda 1 Regs - Page 1 - 911/Carrera GT - PistonHeads UK

Leading reported evidence

Replace appear

Suggestion or failed attempt

No successful repair reported for this finding.

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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

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

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Suggestion · Original poster
Capacity bumped by 20% from 3.0L to 3.6L and both cars released so far only make a handful more ICE horses, so the engine changes appear to be emissions focused and need a lot more capacity to do the same as 992.1.
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Lambda 1 Regs - Page 1 - 911/Carrera GT - PistonHeads UK

Suggestion
Capacity bumped by 20% from 3.0L to 3.6L and both cars released so far only make a handful more ICE horses, so the engine changes appear to be emissions focused and need a lot more capacity to do the same as 992.1.
Original post Read captured discussion
Lambda 1 Regs - Page 1 - 911/Carrera GT - PistonHeads UK

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Leading evidence: 'Replace appear' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace appear' (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 · 4 captured posts examined · 1 partial discussions

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Run cooler in the combustion chamber

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
Larger capacity engines require less boost to generate a given torque so can run cooler in the combustion chamber.
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Lambda 1 Regs - Page 1 - 911/Carrera GT - PistonHeads UK

Run richer

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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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.

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Suggestion · Original poster
I wonder also if the cylinder geometry of the 3.6 is somehow more efficient meaning it can get away with being relatively leaner at higher revs where engines tend to run richer.
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Lambda 1 Regs - Page 1 - 911/Carrera GT - PistonHeads UK

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.

Replace appear

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
Capacity bumped by 20% from 3.0L to 3.6L and both cars released so far only make a handful more ICE horses, so the engine changes appear to be emissions focused and need a lot more capacity to do the same as 992.1.
Original post Read captured discussion
Lambda 1 Regs - Page 1 - 911/Carrera GT - PistonHeads UK

Suggestion
Capacity bumped by 20% from 3.0L to 3.6L and both cars released so far only make a handful more ICE horses, so the engine changes appear to be emissions focused and need a lot more capacity to do the same as 992.1.
Original post Read captured discussion
Lambda 1 Regs - Page 1 - 911/Carrera GT - PistonHeads UK

Run cooler in the combustion chamber

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
Larger capacity engines require less boost to generate a given torque so can run cooler in the combustion chamber.
Original post Read captured discussion
Lambda 1 Regs - Page 1 - 911/Carrera GT - PistonHeads UK

Run richer

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 wonder also if the cylinder geometry of the 3.6 is somehow more efficient meaning it can get away with being relatively leaner at higher revs where engines tend to run richer.
Original post Read captured discussion
Lambda 1 Regs - Page 1 - 911/Carrera GT - 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.

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

PistonHeads: 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: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I thought it would be interesting to explore this topic and didn't find anything on it yet. I have no details myself (sorry!) but hoped some of you might know the regs and/or the science and what it might mean for future Porsche engines beyond the 992.2 GTS.

POST 2Original post

Don't know much about it either but the bald facts are clear with 992.2. Capacity bumped by 20% from 3.0L to 3.6L and both cars released so far only make a handful more ICE horses, so the engine changes appear to be emissions focused and need a lot more capacity to do the same as 992.1.

POST 3 / ORIGINAL POSTEROriginal post

GT3ZZZ said: Don't know much about it either but the bald facts are clear with 992.2. Capacity bumped by 20% from 3.0L to 3.6L and both cars released so far only make a handful more ICE horses, so the engine changes appear to be emissions focused and need a lot more capacity to do the same as 992.1. I wonder if it'll be a big driver for engines to come. Emissions haven't driven the 992.2 GTS spec choices; its CO2 figures are the same as 992.1. It's either the need to not be pure ICE for ~2035 regs or it's because of Lambda = 1. If it's about lambda, I wonder what design features and limitations it drives? The main reason to run rich is for piston crown and valve cooling (I think). I think the heat is mostly generated by engine speed and from combustion pressure. Larger capacity engines require less boost to generate a given torque so can run cooler in the combustion chamber. That's presumably part of the reason for going from 3.0 to 3.6. I wonder also if the cylinder geometry of the 3.6 is somehow more efficient meaning it can get away with being relatively leaner at higher revs where engines tend to run richer. I wonder if we'll also see more fancy materials introduced to withstand the heat in higher performance engines. The Turbo model will be interesting.

POST 4Original post

CO2 is only one part of emissions regulations and tests and is largely reflective of fuel consumption, which is why it hasn't changed. The Lambda one running means it burns cleaner and emits less of the other pollutants. Presumably Porsche must have decided to do so for good reason.

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