Hitting Rev Limiter
#1
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I did not take 996 on the track yet (shame, I know) but drive it somewhat hard on the street. When going on the fun rides to some mountain empty roads in my area on the exits from 2-nd gear hairpins I cannot help but hit rev limiter frequently.
Does it happen a lot to to you guys who take it to the track? Do you think it is not healthy for the engine?
By the way just today I just glanced on the rev counter and the needle hit halfway into red, 7500RPM for split second while being cut off. Now I have a choice of taking the turn in 3-rd and be bored, upshift while just about hitting the exit (horror?) or keep on what I am doing so far.
Advice please?
Does it happen a lot to to you guys who take it to the track? Do you think it is not healthy for the engine?
By the way just today I just glanced on the rev counter and the needle hit halfway into red, 7500RPM for split second while being cut off. Now I have a choice of taking the turn in 3-rd and be bored, upshift while just about hitting the exit (horror?) or keep on what I am doing so far.
Advice please?
Last edited by Janusz; 09-14-2010 at 12:58 PM.
#2
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Down shifting into hitting rev limiter is worse than powering into it. Blowing a head gasket is the main concern I'd have. Also the best torque and power option for turns is below red line. Then you have options for power up and down. Redline in turns will be acting smoother like power curves that are linear but that just deceptive making turns in red line seem better. At least thats my story and I'm sticking to it.
#3
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let me ask you a question, are you an old chevy 350 guy? I am... Had my share of vettes and yes I bounce off the limiter more than I will ever admit. I feel it is due to the way the Porsche engine pulls all the way to the limit... Where the old chebby 350 would lose substantial power 250 rpm before its whole ( I think) 4500 red line. So you could feel it in the seat of your pants when it was time to pull the next gear. Where these little porsche engines pull all the way to red line and want to blast though it like a jet to the sound barrier.
#5
Three Wheelin'
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The rev limiter is doing its job.....and yet, learning to get your timing and cues for shifting right so you're shifting close to red line, but without using the limiter -- is still better. If nothing else, you're slower on the track if you wait for your engine to get into the limiter, then shift.
#7
Drifting
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Cornering speed is not relative to what gear you are in or RPMs. It's normal to associate high RPM to high cornering speeds, but they have little to do with each other. Stay in a higher gear and you will find that you will be able to go faster. You won't be bored if you study the turns carefully and pick reference points for braking, initiating a turn, etc. It's easier to learn to be smooth without worrying about a screaming motor at redline. Smoothness will get you thru the turns quickest.
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#9
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Thanks for interesting comments.
Yes, its hard to sense any power dip just before the redline on this engine.
I will enter these turns in 3-rd now and see what happens. I hate hitting limiter just after apex.
Yes, its hard to sense any power dip just before the redline on this engine.
I will enter these turns in 3-rd now and see what happens. I hate hitting limiter just after apex.
#11
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Cornering speed is not relative to what gear you are in or RPMs. It's normal to associate high RPM to high cornering speeds, but they have little to do with each other. Stay in a higher gear and you will find that you will be able to go faster. You won't be bored if you study the turns carefully and pick reference points for braking, initiating a turn, etc. It's easier to learn to be smooth without worrying about a screaming motor at redline. Smoothness will get you thru the turns quickest.
Nic is right on with his comment in my experience. You should be more concerned with being smooth and fast than what rpm you're at. Entering the turn in a higher gear/lower rpm may actually help you be smoother coming out of the turn by making the throttle less sensitive.
During my last DE my car was running a bit hot so my instructor had me experiment with shifting earlier than I might normally. It was surprising to me that I was essentially just as fast in the higher gears. I was driving more smoothly and the car experienced less wear and tear.
#12
Burning Brakes
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Basically, type 1 over revs are OK (accelerating up to the rev limiter) while type 2 over revs are considered BAD (downshifting and exceeding max allowable revs) and can be catastrophic. The car logs the count of both occurrences.
#13
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-td
#14
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how fast are you going on these public roads?
7500, 2nd gear is what 65/70mph?
and then you are accelerating?
sounds pretty irresponsible , if you ask me.
just the thing that does nothing to help the image of what the public has of p-car owners.
save the speed for the track.
7500, 2nd gear is what 65/70mph?
and then you are accelerating?
sounds pretty irresponsible , if you ask me.
just the thing that does nothing to help the image of what the public has of p-car owners.
save the speed for the track.
#15
Rennlist Member
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how fast are you going on these public roads?
7500, 2nd gear is what 65/70mph?
and then you are accelerating?
sounds pretty irresponsible , if you ask me.
just the thing that does nothing to help the image of what the public has of p-car owners.
save the speed for the track.
7500, 2nd gear is what 65/70mph?
and then you are accelerating?
sounds pretty irresponsible , if you ask me.
just the thing that does nothing to help the image of what the public has of p-car owners.
save the speed for the track.