For those that have driven really, really fast..

I was driving really, really, fast a few minutes ago and everything was fine but when I decided to not go any faster I pushed in the clutch to coast to a stop. Well at that point all the dash lights came on. I managed to come to a complete stop only to realize that the car had cut off, which is why all the lights came on. Fortunately, I was at a red light in the turning lane so I could make a quick u-turn to go home. I pulled out the key, reinserted it to start it up and It started up fine. There was no overheating, no oil compression problems, no wierd sounds and it drove fine. Did I choke the car out by pushing in the clutch after going really, really fast? Do you think the GIAC or V flow caused a problem. It'll be a while before I get another perfect storm to do that again. So I may never know. Also, as I pulled into the driveway, the black cat that walked across the street last night, while on my way to my buddy's house, was sitting at the end of my driveway licking his paw looking at me like "I warned your *** last night"..

Forget about what happened with the stalling...why are you pressing in the clutch and coasting at speed. That's one of the most dangerous things to do as far as car control goes. Let the engine brake for you.

Use the brakes to slow the car, and like 1999 said don't disengage the clutch.

Have to agree with the mistake you made. NEVER "neutral" from high speed to a stop. Brake and downshift at corresponding speed. Without a gear engaged you really loose the strength of the car.

I think you have been told enough how to not slow down� So, how fast?

Well, if he was on power at speed and disengaged the clutch with the right foot still on the gas pedal, the engine would hit the rev limiter, fuel would be cut and potentially (even though it should not) shut the engine down and all electronic lights could come on. Either way, that was a bad move and whatever the car did, it probably did the right thing. Anyway, how fast is "Really, really fast..."??? :-)

Yeah, come on, how fast?

Point taken, I'll just add, clearly you lose controll when engaging the clutch because the car cut off..

67mph

Just curious, does the 996 have enough power to hit the rev limiter in 6th? I have never tried it, but I suspect it couldn't happen. Ub 99 996 76 930 64 356C race 64 356C street

I can happen, I saw it go to 6200 rpm and still pulling, up hill. I believe the car is geared to limit itself at a certain speed instead of electronically controled like many cars.

Eh - 67? Really really fast? ;-) I've done 140 mph/h (225 km/h) without any hitch. Still got to find a empty highway to take it to the max one day.

I can tell you that my Duramax pickup shuts off the fuel at 100 mph. It's like hitting a wall. The damn thing just goes quiet. Wind resistance has got to be 3-4 times that of the 911. Rural high desert Oregon is just like Nevada. Nothing for miles.

Wow :-D The 911 is good for up to 285 km/h if I recall correctly. I surely dont hope it shuts off fuel when going that fast. But 100 mph in a pickup - must be scary as hell. My mothers old VW Golf rattles and shakes so much around 90-100 mph that I do not dare drive it faster. But 140 in the 911 almost feels like driving 40

W DC P, If you had just let the clutch out the car would have restarted and everything would have been fine. Like others have said, never coast at speed. You never know when someting is going to happen that will force you to make an evasive move and you want the car under power when that happens. As for why it stalled. Hard to say. I sure wouldn't worry about it. Jim

Jim, Are you sure? Although coasting is not good, as everyone pointed out, letting out the clutch at such a high rate of speed when the engine is not running (rpm = 0) could have the same effect as missing a downshift. In other words, it could be like slamming on your rear brakes, which, as you know, could cause the car to go into a spin. I mean, at that moment, you don't know why the engine stalled. Maybe your engine has seized? If that happened to me, I think I might be inclined to slow down with as few input changes as I could muster, provided this were safe under the circumstances. Just a thought, TD

What about in a panic stop? Do you guys typically declutch and brake at the same time?

Yupper. As they say . . . "both feet in."

TD, Good point. I should have been more clear. Assuming the car was in a high gear and at least the same gear it was in when he put the clutch in, it will be fine. You sure don't want to downshift and then drop the clutch. Sorry about that. Eke, What's a panic stop? Time at the track will teach you to keep your options open as long as possible. "Both feet in" as TD says is correct but it is your last resort when you've given up on everything else. Sometimes that happens pretty quick. Jim

I really meant panic stop in the sense that on the freeway someone in front of you jams their brakes.

Tim, I understood, and I instinctively go "both feet in" in true panic situations. Jim, I think it could be dangerous even if you don't shift gears. Imagine that you push your clutch in and your engine dies. You don't know why it died. What if it is locked? If it has, and you release your clutch (even in the same gear), your rear wheels will lock, right? That would cause you to spin around and start going *** end first, right? That is what makes me scared to play with my brake bias adjuster very much. TD

I think the engine died because of frustration. It wanted to go really, really, really fast, but you bailed out on it .

Maybe this helps. I have had this same thing happen on various different cars(VW, Audi) and usually its the MAF thats dirty that causes it. If you have an aftermarket filter the oil can get to the MAF and cause it to have these problems. I would sugest cleaning your MAF very carefully with a electronics cleaner or some sort of alchohol. Later, Charles

That's funny!

Yeah, I've had that happen before with conical cotton intakes but I'd rather wait until a Check engine light comes on before I start fooling with it. I doubt I'll be going that fast again anytime soon.

Speaking of brakes. When I first saw the lights on the dash I wondered "is the car off because the brakes seem to be working fine" In other vehicles if the car cuts off the brakes seem to fade because the brake booster is shut down.

There is usually enough vacuum left in the system to at least stop the car. Multiple applications will result in less and less power until all the vacuum is bled off. Who knows why your engine died? Certainly, it was not the speed. Nor was it because you pushed the clutch in. How many of us have pushed in the clutch at 60 mph or higher in order to downshift and pass a road hog? At that speed, I sometimes just play with the gears to hear the exhaust note. I wouldn't worry about it so long as you car is running fine. I certainly would not limit my speed to below 67 mph because of it. If anything, I'd take it on a few spirited runs up to redline just to clear the pipes. Porsche engines like higher rpms and speed. Frustration is still the most lkely cause of death . While I'm at it, I'll jump in with both feet on this brewing argument about clutch in/out if the engine dies. Put the clutch in and the engine dies, the thing to do is to get ready for a lurch and let the clutch out to fire that engine up again. Unless lugging the engine in too high a gear caused it to die, I'd let the clutch out in the same gear the engine died in, and do it ASAP to regain better control. Going at speed with a dead engine and clutch in would be more dangrous, IMHO. Of course, if you are in the middle of a turn or if there is fire, smoke and explosions going on in the engine bay, that's a different matter

TD, I hear what you are saying but agree with Palting. I'd rather risk letting the clutch out than be coasting at a fairly high speed with no power. Jim

I think it was the combination of high speed, the intake, GIAC and the clutch in which caused the engine to choke out. I'll bring it out today to test since it's nice and cool out.

You don't need to pop the clutch out to bump start the car. Just let it out gently like starting out and the car will still start. Just need to get the engine turning.

I would tend to agree. An "indicated" 80mph in 6th is about 3000 rpm. The published top speed of 174mph in 6th would arrive at ~6525 rpm, well short of redline.

Oh trust me it does. I hit the rev limiter in 6th all the time on M street in DC. I own all of the SLs around here.

LOL!! Yeah, I do it on the service lane in front of H20 all the time with minimal casualties..

When you let off the gas at high rpm the fuel injection completely cuts off until the rpm dropps below about 1400. The rpm was probably dropping so fast that the fuel injection did not come on in time to keep it from dying. This is more of a problem with a lightweight flywheel.

I was doing 275 km/h a few weeks ago in Germany in my 2000 C4 Cab. Tiptronic. No problems at all. No loud wind noice from the roof, no shaking. Just simple pleasure A little sweatty afterwards though Too much traffic to get all the way to 280-285 Km/h but there was still some left in it. I think the rev was on approx. 6800 but not sure.

275? My Lord, that is fast. You have brass ones my friend. I can't imagine drving my 996 at 171mph (275km) at anytime, not even on the track where that speed should be. Can't even imagine the carnage that would ensue if a critter shot across the road and disrupted your balance. But then again, I have had mine to 145mph (235km) and that was plenty for me. Not sure how much more differnt it would feel if I had it 25-30 mph faster.

For U.S. citizens driving in Europe (or at least for me), the km/h speedos always made it seem like you were driving ultra fast! I could never make the conversion in my mind on a real time basis so I always felt like I was breaking land speed records until I was passed by a yugo or renault

293 klms/h on the electronic speedos 2 months ago.... unfortunetelly i took a picture but the sun was directly oposite so i couldn't read anything from the foto i couldn't hit the rev limiter though, cause i never tried....since not much straight line was left....

Harris.....which model do you have? Didn't realize the n/a 996 could do 290+.

I did hit 170 mph several times when the car was a few hundred miles over 2K. Haven't done it since. Here's how I summarize the experience. up 10 140 mph, pure exhilaration 140 - 150 mph, living on the edge 150 - 160 mph, beginning to doubt my sanity 160 - 170 mph. visions of my now fatherless children wearing tattered clothes. Car did just fine. Steady as if it was doing 55 mph. But, in a country where the highest legal speed is 70 mph, there is this nagging voice saying "You're insane", getting progressively louder the farther away from that limit you go on the street. Voice is strangely absent on the track, though .

Hit 140 today... my new land speed record.... in my cab.

Weeee - last night I drove home at 2 am from a poker night with the buddies. On my way home, there is a 4-5 mile long tunnel - 100% straight, good lighting conditions and not a single possible place for police to laser me. Wrooooooom wrooooooom With this thread in mind, I just had to try. Up to 200 km/h it feels as if you drive the regular 100. Then it starts. The lines on the road start to fly awefully fast past you. Up to 250 km/h you feel that you are still in control. But between 250 and 270 (where I stopped) you really doubt your sanity. The stripes on the road seem like a continious line and you dont dare to fart - fearing that you cant hold the car straight and the slightest turn on the wheel will crash you into the concrete walls. What a thrill and the adrenaline rush afterwards was awesome. I couldnt do the last 15 km/h to reach max speed. End of tunnel and it was going up towards a large bridge with turns. Been there, done that now. Not going to try it again for a while. But if you have the ***** and a long straight road devoid of any obstacles, then its a fantastic (and scary) feeling. But it doesnt take much more than a freaking rabbit on the road, and you are toast. Beware - and I would never ever try this on a road where someone stupid could jump in front of you, or grandpa in his pickuptruck switches lanes without looking back.

996 C2 01 on 285-30-18 i have also pics from other 996 one of a 996 C4 at 294 klm/h i cannot verify if it is 3.4 or 3.6

and another one from a 996 carrera @ 301 klms/h this one though does not show the digital speedo...so aaccuracy might not be that high.... i do not know if it is C2 or a C4 , 3.4 or 3.6... but the point is that the carreras are capable of doing 280++ for sure wich is a very high speed

unfortunetelly i tried 3 times to post it.... no luck sorry will try again later

Where did you get that pic from? It looks a lot like a pic Carlos from Spain posted some time back. He had a 3.4L.

That is definitely from Carlos' car.

yes, i have a feeling that i got the pic from this forum cannot rember if so.... sorry. harris

I am only a 1+ year owner, so I got a little nervous at 137 and backed off (this is at 1am on the 110 south, near the end, in So Cal. Thrilling, but a little scary, for sure.

don't ask why I did it but I did 168 a trying to let go of a juiced A6 audi that pulled strong up to 155. the sides were moving by so fast I made a stretch of 20 miles that normally takes a 15-20 minute drive feel like 5 minutes. never going to do it again. ever since it seems everytime i stretch the car 140mph can be reached without noticing because after 150mph you must be insane to keep going.

Don't beat yourself up over it. At a good speed, I turned the ignition off instead of the head lights by accident a few months back...talk about stupid!!! Use your brakes to slow her down.

Speaking of turning off your lights...when I lived in Brussels, used to do biz in Bavaria and would hit a section of the autobahn with my German mistress in her TT. She would rocket up to 280 km/h and when I would glance at her I could swear she had her eyes closed. As she wanted to share the joy she would be reaching for the lights to turn them off as we shot through the countryside. I swear I could hear the schadenfreuden laughter of some long buried Geheime Staatspoilizei unit beackoning me to join them in Hell. I remember, supper that evening along the Donau was quite uncomfortable.

it all comes down to a point where you drive as fast as you are feeling the car stable or somehow under control, and of course it totally depends on how you fence FEAR..... first day i bought my previous P-car a 964 C2 i did hit 160 Mph on a wet road (straight line of course ) on badly worn tyres..... i was 19....that day... after 8 years it seems to me ridiculous what i did....but at the time, at that age under these conditions i did it...... may be what i did was less dangerous than trying to take a curve at 125 Mph.....who knows? Know that i am 27 with a 996 i still hit 180 Mph with it......maybe my brain is still 19..... anyway what i am trying to say, it all depends on conditions....which are endless to write down. everyone drives as fast as he can.... for the record my max speeds are 1. 185 Mph - 297 Klms/h on my 996 2. 178 Mph - 285 Klms/h on my 964 3. 175 Mph - 280 Klms/h on my godfather's 993 all on P-cars!!!!!

185 in a 996? Did you have a tail wind going downhill?

it was a bit downhill, but it is true. i did hit 185