Wow Enrique you're a real piece of work neg repping me for calling you out on the BS you are trying spread:

How many owners drive... 09-02-2012 04:29 PM Great way of being a redneck idiot.

Hope you don't treat all your potential customers that way. You and Dan @ Vivid are real pieces of work copying other's designs and calling them yours... Like you invented the X design without cats. Give me a break...

If you have something to say, come on over and say it to my face. If I am ever in your area, I'll stop by and tell you what I think about you.

 

Yes there is. Front diff & cardan shaft. If you lug your engine under 3K in any gear they will eventually fail. Porsche knows this hence the reference in the manual. Ask me how I know... I never drive my car under 2.5/3K in any gear anymore.

 

Not really, but interesting explanation. The above 3K is about protecting the front diff and the cardan shaft. If you labour the engine (easy to do in our cars below 3k due to huge torque available) the stress on cardan shaft towards the front diff is immense. Eventually both units will fail, (due to inherent play where the cardan shaft slots into front diff housing). This happened to me. This is especially applicable to tuned cars. When you drive below 3K in third or for the experiment sake slot your car into 4th listen out for some cardan/front diff rattle - which is apparently normal. I was told this when I spoke to Porsche Stuttgart, they said; this play under load such as labouring the engine increases and leads into front diff cardan shaft failure. I was therefore advised to stay above 3K at all times, which I duly obey.

 

this is becoming more fantastical with each new day. what happened to you exactly? your cardan shaft failed, and you attribute that to driving your car at engine speed below 3k?! wow. you guys know better than i do, and while i have zero technical expertise or experience i have been driving both dodge power wagons w/ crash box and 356's and many MT's in between for 45+ years, i've had four 911's, ( you could drive a 993 at 2k all day long without lugging it ) and i know the difference between "lugging" your engine, and driving at low rpms, which in this car is between 2k-3k, and i will never believe ( in spite of your thoughtful if not somewhat implausible anecdotal evidence to the contrary ) that it is harmful to the car. no one drives at that low engine speed constantly ( how again, did your cardan shaft fail?! from low rpms?! ), any more than they would above 3k! it isn't practical, or possible in most driving conditions. now i must ask, did you drive continually at low revs? i'm being rhetorical, of course you didn't.

not looking for an argument, either ( really ) so i'm not second guessing your experience, just the plausibility of occasional(?) low engine speed driving causing some premature failure of a component of the car. do you know of any literature that supports that info? i'd really like to read it. bottom line: my uneducated take again: lugging is bad. low speed ( 2-3k) engine driving is not. except to the cardan shaft apparently. ok.

 

My door latch micro switch went out because of driving under 3k RPMs. Engine harmonics made it happen.

I only drive over 6k RPMs now because someone I don't know told me to because they have a Beetle that they had issues on and they have the same engine.

 

i once many years ago had the west coast PCNA rep in my car for an hour trying to help diagnose a rattle. after returning to the dealership and being tossed alternately into the b pillar and my right shoulder in corners, he said:

"i still don't know where that rattle is coming from, but you sure "drive the car like it's meant to be driven".

i didn't believe him either.

 

No there's not.

1. Define "lug"
2. Operation of the engine at 3000 RPM is no problem, but operating the engine at 2900 RPM is??
3. Please provide data that supports your "fail" claims.

Source? Where is it in the manual??

 

My guess (and I admit it's pure speculation) is that we're splitting hairs here. In other words, our cars are mechanical devices that are intended to be used, maintained, and occasionally fixed. Many of the components will wear out from normal use, and trying to figure out which component wears out faster depending on specific driving technique is likely too complicated for any rational debate.

I suspect no one purposely lugs there engine around (unless you have a Corvette and you haven't installed the 1st-4th gear bypass for mpg ) -- it just doesn't feel or perform right. Assuming that's true, I'd say that there really isn't much difference whether one prefers to shift earlier or, like me, rev a little higher and shift later. Sure, there may be some components that take more strain at low rpms during acceleration -- but there's likely many other components that wear faster when we're up at higher rpms. Similarly, I bet we're putting some excessive wear and tear every time we brake a little harder, take that corner a little faster, or punch it a little bit more. It's just the nature of the beast and if we're not pushing our cars, then we're wasting our money and time -- and should have stuck with the family sedan.

Just drive it the way you like to drive it -- life's way too short to worry about whether your rpm is too high or low....

(BTW, I still routinely get thanked by a co-worker of mine for telling him that he could drive his 335i above 4K rpm. He felt that it completely transformed his car ).

 

the only thing i've ever read in porsche literature about restricting rpm is that driving ABOVE 3000 rpm before having reached full operating temp is ill advised.

i think people may be reading the manual backwards or possibly upside down.

 

kind of like listening to records backwards for satanic verses? Him maybe the porsche manual has some satanic verses.

Just to be straight, we are talking about the Porsche Repair Manual 996tt?

 

See what happens when you get members that also practice rocket science and drivers that really drive together..

 

Let's try an add some civility to this conversation. I would bet that most Turbo's are lugged for the most part, at the very least while driving around town. The fact remains that failures of this nature are few and far between.

Frankly I'm about sick of all the panic that ensues when a couple of random failures happen. This one is simple, if you don't care, bog the engine all you want. Read your owners manual and make an educated decision.

 

not sure. maybe led zeppelin two.

 

ok, i'll bite. why do you think that? i don't think there is ONE person here that LUGS their car. driving the car below 3k isn't "lugging" it! every single one of us would agree (?!) on the description of "lugging" in "real world" terms, eg driving. because we all freak any time we get under a certain rpm ( based upon years of driving experience and "intuition" ) in any given gear and downshift immediately. it's that, "oh s*hit, wrong gear" feeling. we all know the difference between lugging and driving at low rpm's. it's just tough to "type".

i think the debate hinges upon what constitutes "lugging" VS driving at lower rpm's. again, driving this car below 3000 rpm, and especially in staid conditions - eg heavy traffic or even just "cruising" - at rpm's btw say, 2k, and 2950.. is NOT... lugging.

i'm being civil, and this may be a matter of definition or semantics but driving under 3k rpm during the course of NORMAL operation, isn't going to hurt a mezger m64/96 engine. ask me how i know. lol. cardan shaft??! well, i have my doubts on that also, but someone else believes it happened to them that way, so that will have to be one of those things that makes ya go "hmmm".

 

I've always kept my rpm above 3000 on all my cars. I never give it much thought actually.