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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
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YOUR RESEARCHX51 package
Leading reported evidence
Replace exchanged or modified
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
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1
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Performed · outcome unconfirmed
The following parts in the engine are replaced, exchanged or modified to achieve this increased performance:
Leading evidence: 'Replace exchanged or modified' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'same ratio' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace exchanged or modified' (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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Suggestion
"A parts set -"Carrera Powerkit"- is available to retrofit the standard engine with an increased performance of 254 kW (345 HP).
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.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
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Generation: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
X51 Power Kit
(from the tech bulletin describing installation)
"A parts set -"Carrera Powerkit"- is available to retrofit the standard engine with an increased performance of 254 kW (345 HP). The following parts in the engine are replaced, exchanged or modified to achieve this increased performance:
- new intake manifold with modified cross-section (material: sand cast aluminum );
- new intake pipe supports adapted to the form of the intake manifold;
- new exhaust manifolds with larger cross-section and optimized flow behavior;
- new cylinder heads with optimized, CNC-milled inlet ducts;
- new camshafts with larger valve stroke on the inlet side and modified inlet and outlet timing;
- inlet valve springs adapted to the enlarged valve stroke;
- modified partition box in the oil pan;
- modified maps for the DME control module.
The following steps are also taken on the vehicle:
- new underside panel in the transmission area;
- additional radiator in connection with modified front spoiler, except on the 911 Carrera 4S (996).
The higher-performance engine is also available as an option when ordering a new vehicles - 911 Carrera / 911 Carrera 4 /911 Carrera 4S /911 Targa - under Exclusive Option X51."
The X51 kit is a engine upgrade to the standard M96 engine. It includes the cast aluminum GT3 intake manifold, larger headers, different cam shafts, modified cylinder heads, the third radiator and a re-programmed DME. The factory specs for the system are +25 hp and the 0-120mph time reduced by 1.0 seconds. I have driven both X51 and non-X51 back to back and find the X51 to have a more responsive throttle, noticably more power and no loss of low end torque. I woudl estimate it closer to +40 hp, but have not dyno'd my car yet.
Check out this link for more details...
<a href="http://www2.uk.porsche.com/english/gbr/accessories/exclusive/enhancement/default.htm" target="_blank">http://www2.uk.porsche.com/english/gbr/accessories/exclusive/enhancement/default.htm</a>
Would you get better value (hp/per dollar) in just upgrading the standard 3.6 engine with aftermarket fabspeed headers and exhaust, DME reprogam and a EVO intake ?
Thunder
2002 Artic Silver C4S
I notice that the cost issue has not been discussed
If you want to improve the throttle response, what methods are there?? I am familiar with the Sprint Booster, but is there anything else to increase throttle response??
This is a source reference. Confirm exact model applicability in the original material.
