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Does your 911 run out of steam near redline?

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32 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHDoes your 911 run out of steam near redline?

Reported repair

Replace car

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1
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0
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1
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Reported fix

I changed car. Problem solved.

Does your 911 run out of steam near redline?
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Leading evidence: 'Replace car' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, The most frequently discussed action is 'Replace car' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Replace car', supported by resolution reports in 1 discussions. These are forum reports and suggestions, not a confirmed diagnosis.

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Clean needed

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No successful repair reported for this finding.

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1
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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.

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Suggestion · Original poster

TB cleaning needed?

Does your 911 run out of steam near redline?

Replace mass air flow sensor

Suggestion or failed attempt

No successful repair reported for this finding.

0
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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.

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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

if the car pulls hard to redline, change your MAF.

Does your 911 run out of steam near redline?

Run engine

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

Don't rule out your engine's oil viscosity when running an engine with hydaulic lifters.

Does your 911 run out of steam near redline?

Run wot

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No successful repair reported for this finding.

0
Reported fixes
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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 · Original poster

When do you all shift when running wot?

Does your 911 run out of steam near redline?

Suggestion

I try to shift in the 6600-6800 area when running WOT.

Does your 911 run out of steam near redline?
Frequently discussed actions (5)

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

Replace car

1
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that report a fix
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.

Reported fix

I changed car. Problem solved.

Does your 911 run out of steam near redline?

Clean needed

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

TB cleaning needed?

Does your 911 run out of steam near redline?

Replace mass air flow sensor

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

if the car pulls hard to redline, change your MAF.

Does your 911 run out of steam near redline?

Run engine

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

Don't rule out your engine's oil viscosity when running an engine with hydaulic lifters.

Does your 911 run out of steam near redline?

Run wot

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

When do you all shift when running wot?

Does your 911 run out of steam near redline?

Suggestion

I try to shift in the 6600-6800 area when running WOT.

Does your 911 run out of steam near redline?
Actions with reported resolution accounts (1)

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

Replace car

1
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report a fix
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.

Reported fix

I changed car. Problem solved.

Does your 911 run out of steam near redline?
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.

32 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.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I tried searching for some answers to this... but it was difficult to come up with a decent search string... Coming from a Honda S2000 and spending a lot of time in M3s... I'm used to engines that pull harder and harder the closer they get to redline. I feel that my C4S pulls very hard, but as it nears the upper rev ranges, it starts to loose its breath. Anyone else feel this way? TB cleaning needed? Could it just be the 95degree Houston weather? Thanks and happy motoring.

POST 2Original post

Yes, I remember mine could of shifted a little sooner to help acceleration, maybe 200-400 RPMs (it was a Tip). Don't forget the high humidity of Houston too. But, I think the E46 M3's (if that's what you are referring to) fall on their face too before redline.

POST 3Original post

Might be something like your TB cleaning. Mine pulls hard enough I have to pay attention to the gage when driving hard... no sense I'm at redline until the limiter tells me.

POST 4Original post

I think most cars have a decline in power as you approach redline. The peak horsepower is usually hit before redline...

POST 5 / ORIGINAL POSTEROriginal post

Actually, E36 - that car just gets angrier as it revs on. The S2000 as well - it pulls strong all the way up. I just feel like my 996 feels a little flat at the top... I just assumed these cars performed best when shifted at redline, but perhaps not... When do you all shift when running wot?

POST 6Original post

I have found that shifting just before redline is the best. In this manner you will maintain your RPM's in the maximum bell curve for both HP and torque and will acutally accelerate better than if you shifted at or beyond redline. And remember if you do go into the redline the rev limiter will kick in as a protection. At least this happens on my 997S. Best RPM shift for me is between 6700-6800. Within that band she truly is a monster. Jay

POST 7Original post

Quotes source post: 5631596

6800 is the peak rpm. I try to shift in the 6600-6800 area when running WOT.

POST 8Original post

X51 cars have an urgent surge from 5K to redline!

POST 9 / ORIGINAL POSTEROriginal post

Quotes source post: 5638371

I bet they do!! I think this costs over 7K to do as an "aftermarket" add-on...

POST 10Original post

My '99 runs out of power only if I hit the rev limiter. It pulls hard and strong and I can't tell redline is approaching unless I look at the tach. I've had years of racing experience so I'm used to making use of all the high end power a motor will put out. I think the early 996s have a different feel (good) as far as throttle response and power delivery and also, they are lighter.

POST 13Original post

Quotes source post: 5646938

Isn't the TT's redline only 6400rpm?

POST 14Original post

mine runs to 7000 strongly and only gets stronger. make sure your cam sensors are switching..... I had this happen and the car was dead after 4 or 5 grand gutless, it was fixed easily and runs fine.

POST 15 / ORIGINAL POSTEROriginal post

ok stupid question (since this is my first 911)... i like the sound, and i hope (think) its normal, but the engine gets really raspy near redline... is this typical?

POST 16Original post

Quotes source post: 5651227

When I did the MK I muffler mod, my car sounded very raspy right before it hit redline.

POST 17Original post

nope.... having the reflash ecu, headers, mufflers, ipd, hi flow cats, the engine just pulls to redline........

POST 18Original post

Quotes source post: 5661189

ditto, mine is strong past redline and reprogrammed ecu, it climbs too fast sometimes...........

POST 19Original post

Quotes source post: 5629979

The S54 makes its peak power at 7,900RPM.

POST 20Original post

Max power is at 6800rpm, but the redline goes a bit beyond that so that when you upshift you are still at a high enough rpm to be making good power.

POST 21Original post

Don't rule out your engine's oil viscosity when running an engine with hydaulic lifters. Too thin an oil can reduce lift at high rpm's.

POST 22Original post

My 2002 C4 has a distinct burst once I get close to the redline.

POST 23Original post

Quotes source post: 5685041

Yes, but to me (being a drag racer), S54's feels like they stop pulling before that. I always shift a car the split-second I feel the engine plane out, puts the engine in a better torque range to carry the car quicker IMO.

POST 24Original post

Quotes source post: 5685181

That is an old school theory, don't you think? The weight of the valvetrain in the M96 is very light (no pushrods, lighter spring rates) compared to an old V-8. I mean, we are still talking 40 weight oil that I assume most are running.

POST 25Original post

a MAF in its early stages of decline can cause this issue (so can a dirty one!). turn off the car, unplug the MAF, and go for a drive. if the car pulls hard to redline, change your MAF.

POST 26Original post

Quotes source post: 5700506

A hydraulic lifter is still a hydraulic lifter. As the speed of the piston increases, improper oil often prevents the lifter from a full pump which in turn decreases valve lift. This was, in fact, a problem in the old days and continues to be a problem today. Remember, there is a HUGE range in allowable viscosity in 40 weight oils. Not all 40 weight oils are alike.

POST 27Original post

Quotes source post: 5700622

You think high-revving, modern engines have float, especially Porsche engines? I would think not but I wasn't there when the valvetrain was designed.

POST 28Original post

Quotes source post: 5700945

Mobil 0W40 wasn't there when the vavletrain was designed either.

POST 30Original post

Quotes source post: 5700980

I ain't touchin' that with a 10-ft pole.

POST 31Original post

Mine pulls hard all the way. I upshift for dragracing at about 6700 indicated (1-2), then about 7000 for the rest of em... Keep from smacking the rev limiter that way. I know the actual RPM is higher than indicated and revs faster, especially in the lower gears. Mine has a LW flywheel though, so you may shift at a little higher revs. Never seemed the power was falling off at any point...

POST 32Original post

My car pulls really hard the last 1000 rpms or so before red line. In fact it sounds like it's opening up like an afterburner and just screams to redline. I do have the X51 factory installed so that could have something to do with it.

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