Last post on Oct 24, 2013 at 5:25 PM
You are in the Porsche 911
What is this discussion about?
Porsche 911, Porsche Carrera GT, Coupe, Convertible
Jun 07, 2007 (11:46 am)
I agree entirely. I have a few more years on you (about to turn 63) and one more Porsche, just acquired my 5th. Had a '69 911 back in the early '70s, then a new 914, then a '73 911 targa, then nothing for 25 years. Got married, bought houses, put 2 kids through college, etc. Leased a 2000 Boxster new and drove it for 3 years, then got out of the program again. About a month ago I picked up a 2004 C2 cab with 17,500 miles on it.
I think I could win the part of the Cheshire Cat in an Alice in Wonderland performance. The feeling and enjoyment are almost beyond words. Did I get the best deal on the planet? Probably not. Did I pay too much? Probably. Practical? No way, shape, or form. Trunk space is an absolute joke. But I got a car with almost 2 years of warranty left on it; got it from a Porsche dealer with whom I have done business with in the past, and a service manager whom I trust implicitly.
Atlas Gray, black top, black interior, BOSE upgrade (waste of $$$, I want to hear the mechanicals), bi-xenons, heated seats, 18" wheels with color crest centers, and not much else.
So far it has been outstanding. I'll worry later about where I'm going to get the $1,000 for new tires next year. Unlike you I did not pay cash for it so I am looking at car payments. But, the house is paid for, the kids are out of college, my retirement is secure, I can handle a car payment.
If this is my mid-life crisis, what a way to go!
#1649 of 2175 Re: Hoooplaaah!!! [jerseyguy1]
Jun 07, 2007 (6:39 pm)
Congrats , and enjoy your car... ain't life great!
Jun 07, 2007 (7:41 pm)
"ain't life great! "
so far, so far. just got to those PSA test numbers looking good!
Jun 11, 2007 (9:13 am)
I have a good friend, a younger man, who enjoys fast cars and in our discussions always states that he uses his car in a manner for which is was built. ( He scares the crap out of me when I'm the the right seat ! ), he holds the edge on safety..reasonably close anyway. Taking his heed, I warmed up the old 997 yesterday and went to my favorite, cop-less stretch of road and pushed it. Running through 2nd and 3rd, trying to come as close as possible to redline to see what my C2S was capable of, I went over a bit, maybe to 7600 rpm and the rev-limiter kicked in....boy the engine just died and re-engaged at 6800rpm.. Has anyone ever done that before...guys??? I'm sure the limiter is there for that reason... I've never experienced that before.
#1652 of 2175 Re: Rev limiter [chrmdome]
by MrShift@Edmunds HOST
Jun 11, 2007 (9:15 am)
you're wasting your time and gas at the rev limiter. Your best power on that street engine is not that high up.
#1653 of 2175 Re: Rev limiter [chrmdome]
Jun 12, 2007 (2:08 am)
Used to do that all the time in my old '85 Carrera. I thought it was a great thing to have. Its good to know that it works!
#1654 of 2175 Re: Rev limiter [chrmdome]
Jun 12, 2007 (3:11 am)
According to my brother (race team engineer / consultant for Porsche), running a C2S past redline and to the rev limiter is flirting with engine damage. Yes, the rev limiter will keep you from going to 8,500 rpm and blowing the engine up, but, as you experienced, the immediate fuel cuttoff puts a different type of unusual stress on the engine.
And it is, in fact, unnecessary to eek maximum performance out of the car. As the host pointed out, peak power in any gear comes before redline. The practice of pushing the car a little past redline was used in early 911's that were 4 and 5 speed manuals, in order to increase the rpms for the higher gear you were shifting into. But with the perfectly geared 6-speed in the 997 model, shifting at 6,800-7,100 rpms puts the next gear in its entry point sweet spot for maximum acceleration.
You will not find any accomplished Porsche driving instructors hitting the rev limiter on their way to track times that you or your friend couldn't come close to matching.
For someone who, if I'm not mistaken, meticulously takes care of their car and drives it sparingly to keep it looking perfect, running the rpms up to 7,600 past the rev limiter is a ill conceived way to "see what the car can do". That manuever will also show up on a computer readout of the engine and, frankly, I would never buy a car that had been rev limited, no matter how clean your interior and wheels were. Did you do any damage this one time - unlikely. But Porsche engineers put the redline there for a reason - and give you the ability to achieve maximum acceleration and hit top speed without exceeding it. You wouldn't run into a wall to test your airbag system. Running the engine to 7,600 rpm to test the rev limiter isn't a whole lot smarter.
#1655 of 2175 Re: Rev limiter [redsoxgirl]
Jun 12, 2007 (1:15 pm)
I don't quite understand the relationship between my keeping my car clean and using the car, whooo edgy! If anyone had an intention to actually see if the rev limiter would function, it certainly would not be me. It was a mistake on my part. I can't see anyone here on this forum at some time or another not having the rev limiter kick in in 1st gear at least once. Oh well...logically if you have driven the car 400 times and reached red line 399 times your warranty would go void...they put the rev limiter there for a reason and it is most likely at a point relatively far from engine damage, unless you over-rev on a DOWNSHIFT! Have you ever missed a shift?
The rev limiter is there for a reason... just like child resistant caps on a prescription medication vial... it's used before damage occurs. If it's chronic it's a problem. The people at Porsche are smart and I'm sure there is a great deal of latitude between cut off and damage. I am sure that I never mentioned in my post that I was running a test...I was looking for info because it was unintentional.
#1656 of 2175 Re: Rev limiter [chrmdome]
Jun 12, 2007 (3:23 pm)
Not taking sides or defending redsoxgirl, but there is a point not to be missed. Porsche already sets the rev limiter at about 500 rpm past redline. That is the "latitude" they are allowing YOU, before it kicks in. On my M5 and several other cars I've driven, the rev limiter is set right at or just above redline.
I am quite sure that accidentally hitting the rev limiter once or twice would not harm the engine on a 997 C2S. But, by the same token, considering that Porsche gives you an extra 400-500 rpm to play with past redline, it's probably prudent to take care to avoid it.
P.S. One of the reasons I like the 997 GT3 so much is that it has an 8,400 rpm redline that you can easily anticipate. If you have trouble staying within 7,200 rpm on a C2S with 295 ft lbs of torque, try a 997 Turbo with 520 ft lbs. The GT3 is a fun car to drive if you like life above 7,000 rpm.
#1657 of 2175 Re: Rev limiter [spiritinthesky]
Jun 12, 2007 (6:51 pm)
I did some research on rev-limiters and how the DME records these issues. Porsche reads the DME report and the records illustrates the number of ignitions starts, miles , hours driven and Stage 1 through 6 " over-revs. Stage #1 are over-revs protected by the rev-limiter...hypothetically these are not the damaging type since they do not exceed the " protected range" . The rev limiter kickes in at 7300 rpm. Stages 2 through 6 are the over-revs due to a downshift mistake...these can be engine damaging, since there is no fuel shut off. The DME record allows a judgement to be made in the stage 1 area of the over all treatment of the vehicle and when it happened. Obviously if you have 400 ignition starts and you have had a rev-limiter shut off 275 times, you are mistreating the vehicle. Porsche North America would be contacted by the dealer to decide on any warranty issue if there was a pattern of misuse. I just didn't think Porsche put the rev- limiter there as a brain fart. They are protecting these cars for non -professional drivers like myself... this issue is unlikely to come up again on any of my posts. Period.