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C4 Dyno...

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHC4 Dyno...

Leading reported evidence

Run 4s

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
I ran my 4S on a DynoDynamics dyno and it 'bucked like a bronco', this was with the dyno in 4wd mode where there is a 400bhp limitation.
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C4 Dyno...

Frequently discussed work

Disconnect driveshaft

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
For a 4wd Porker you 'do' need to disconnect the driveshaft to the front.
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C4 Dyno...

Read full discussion summary

Leading evidence: 'Run 4s' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect driveshaft' (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 · 5 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Use by evo) dyno and chris terminated the

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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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
I ran mine on the trusted Weltmeister (used by EVO) dyno and Chris terminated the run for fear of damage to the dyno (and the car of course).
Original post Read captured discussion
C4 Dyno...

Disconnect driveshaft

Suggestion or failed attempt

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
For a 4wd Porker you 'do' need to disconnect the driveshaft to the front.
Original post Read captured discussion
C4 Dyno...

Run fear of damage

Suggestion or failed attempt

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
I ran mine on the trusted Weltmeister (used by EVO) dyno and Chris terminated the run for fear of damage to the dyno (and the car of course).
Original post Read captured discussion
C4 Dyno...

Frequently discussed actions (4)

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

Disconnect driveshaft

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
For a 4wd Porker you 'do' need to disconnect the driveshaft to the front.
Original post Read captured discussion
C4 Dyno...

Run 4s

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
I ran my 4S on a DynoDynamics dyno and it 'bucked like a bronco', this was with the dyno in 4wd mode where there is a 400bhp limitation.
Original post Read captured discussion
C4 Dyno...

Run fear of damage

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
I ran mine on the trusted Weltmeister (used by EVO) dyno and Chris terminated the run for fear of damage to the dyno (and the car of course).
Original post Read captured discussion
C4 Dyno...

Use by evo) dyno and chris terminated the

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
I ran mine on the trusted Weltmeister (used by EVO) dyno and Chris terminated the run for fear of damage to the dyno (and the car of course).
Original post Read captured discussion
C4 Dyno...

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.

5 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: 20261027T075545Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, does anyone know where I can get a 996 C4 rolling road done? Preferably near to west London... I've tried various people and it appears to be a specialist thing due the power split between front and back. Thanks.

POST 2Original post

Hi Stuart, cant help with your main request for obvious reasons Intrigued to find out how she does on the dyno. Subjectively how is the new system performing? Andrew

POST 3Original post

For a 4wd Porker you 'do' need to disconnect the driveshaft to the front. I ran my 4S on a DynoDynamics dyno and it 'bucked like a bronco', this was with the dyno in 4wd mode where there is a 400bhp limitation. On an Evo or Scooby this is usually fine but the viscous coupling/ABS/PSM on the Porker reacted too quickly for the dyno to adjust.

POST 4 / ORIGINAL POSTEROriginal post

Thanks Damien, that's what I've heard, one tech guy even mentioned there's a possibility of the differential failing during the test! Doesn't dropping the drive shaft, so effectivelyt you're 2WD, effect the readings? Or is the reading related to the engine regardless of how the power is transferred to the road? Don't think there's any risk of breaking the 400bhp mark though, haha.

POST 5Original post

The 400bhp was in the dyno 4wd mode. The dyno didn't have that limit in 2wd mode Yes, what you've heard about the diff. failure is true, the viscous coupling heats up and 'could' go pop but it's unlikely on a short dyno test. What's more concerning is the bucking that the car did. I ran mine on the trusted Weltmeister (used by EVO) dyno and Chris terminated the run for fear of damage to the dyno (and the car of course). You are effectively running in 2wd mode so the transmission losses are as a 2wd car thus engine BHP can be calculated based on this.

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