9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH4k rpm the sweet spot? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Fill stator
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
The 2nd version - '03-'06 eliminates the Solenoids and uses an Oil-filled Stator.
4k rpm the sweet spot? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Fill stator' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'torque peak' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Fill stator' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
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
The 1st version - '97-'02 used an Electric Solenoid which Advances the Intake Cam 13°, the limit of this system is that it is either ON or OFF at a pre-set RPM controlled by the DME.
4k rpm the sweet spot? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
torque peak
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
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 suspect a cause
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.
Suspected cause
I at first thought that the punchy feeling I got at 4500 RPM was the variocam changeover point, but someone (I believe on here) told me a long time ago that it was the torque peak, and that variocam didn't switch over until like 5200 RPM.
4k rpm the sweet spot? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Set rpm controlled by the dme
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The 1st version - '97-'02 used an Electric Solenoid which Advances the Intake Cam 13°, the limit of this system is that it is either ON or OFF at a pre-set RPM controlled by the DME.
4k rpm the sweet spot? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use oil
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The 2nd version - '03-'06 eliminates the Solenoids and uses an Oil-filled Stator.
4k rpm the sweet spot? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Set rpm controlled by the dme
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
The 1st version - '97-'02 used an Electric Solenoid which Advances the Intake Cam 13°, the limit of this system is that it is either ON or OFF at a pre-set RPM controlled by the DME.
4k rpm the sweet spot? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use electric solenoid
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
The 1st version - '97-'02 used an Electric Solenoid which Advances the Intake Cam 13°, the limit of this system is that it is either ON or OFF at a pre-set RPM controlled by the DME.
4k rpm the sweet spot? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported and suspected causes (1)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
torque peak
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.
Suspected cause
I at first thought that the punchy feeling I got at 4500 RPM was the variocam changeover point, but someone (I believe on here) told me a long time ago that it was the torque peak, and that variocam didn't switch over until like 5200 RPM.
4k rpm the sweet spot? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
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.
9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 1 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Why is the Box very happy at 4000-4500 rpm and 100 mph? The reasonance is perfect, the ride is smooth, and the engine almost feels twitchy and ready to go. Is seems like this is the sweet spot...kind of like the when you make contact with the golf ball and you can just tell you schwacked the hell out of it. Is it purposely geared this way, or does it have to do with cams...?
I don't think it is
just
the VarioCam. Since the VarioCam varies the timing of the intake camshafts to optimize performance at any engine speed or load. The camshaft angle is continuously varied by the twin rotary valve vane adjusters.
On the 987, at about 4500 RMP, the torque curve is at about optimum- 191 lb.ft. (Max being 199)
And for the 987S, at about 4500 RPM, the torque curve maxes out at 236 lb.ft.
Hi,
VarioCam's job is to increase/decrease
Valve Overlap
to maximize Torque and Power. In the past, selecting a Cam was always a compromize between these two.
By Advancing/Retarding the Valve timing, you can increase Torque, Power, and lessen Emmisions. Retarding the V Timing in the Low-Mid Ranges increases Torque, while Advancing the V Timing at Idle and Low RPM Range increases Power and reduces HC Emissions.
There are 2 versions of VarioCam on the Boxster. Only on the Latter version is the adjustment
Continuously Variable
.
The 1st version - '97-'02 used an Electric Solenoid which Advances the Intake Cam 13°, the limit of this system is that it is either ON or OFF at a pre-set RPM controlled by the DME.
The 2nd version - '03-'06 eliminates the Solenoids and uses an Oil-filled Stator. This allows for infinitly variable V Timing within a 40° Range. This is where much of the HP/Torque gains are had over previous MY. Also, a Synchronizing chain between pairs of Cams is eliminated probably eliminating a 1-2 HP Parasitic Loss.
Happy Motoring!... Jim'99
I at first thought that the punchy feeling I got at 4500 RPM was the variocam changeover point, but someone (I believe on here) told me a long time ago that it was the torque peak, and that variocam didn't switch over until like 5200 RPM.
I haven't seen the charts, but I'd be inclined to believe it.
I didn't know the 03+ vario was infinately variable throughout the range. That's cool. I still feel a surge right about 5,200 rpm that is accompanied with a great intake sound. You'd think if it was infinately variable there woul be linear power delivery thoughout the rpm and no spikes at about 5,200. Don't get me wrong..I love the power surge
This is a source reference. Confirm exact model applicability in the original material.
