I do you not hit the rev limiter all the time?
10-04-2018, 03:14 PM
#16
Racer
Thread Starter
10-04-2018, 03:21 PM
#18
RL Community Team
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Yes it does!
10-04-2018, 03:25 PM
#19
Rennlist Member
It's threads like these that make me yearn for the days before the Internet. I liked not knowing people like this existed.
I'm just kidding! I know this thread was made to be a silly joke.
I'm just kidding! I know this thread was made to be a silly joke.
10-04-2018, 03:26 PM
#20
Racer
Thread Starter
10-04-2018, 03:31 PM
#21
Racer
Thread Starter
10-04-2018, 04:13 PM
#22
Burning Brakes
A lot of this discussion is about the best place to be in the power band based on graphs. The reality is that the track will determine where you are in the power band. At Road Atlanta, my 996 performs best in 4th gear for most of the track. Third up the hill after Turn 5 and 5th on the front and back straight. I am not good enough to hit the red line in 4th in most places except the straights, where I shift when it "feels right". I'm not racing, so shifting a little early is no big deal.
10-04-2018, 11:51 PM
#23
Three Wheelin'
I think I can relate to what the OP is saying even though I rarely drive the car really hard and have never hit the rev limiter. With the 3.4, the real power doesn't happen until 6k. I know that's not what the power curve says, but that's been my experience in both my 996.1's. With that narrow band from 6000 RPM to 7000 RPM, you really have to time the shifts exactly right to get maximize power without over-revving. With the 3.6, the power comes on in lower rev ranges, so it doesn't need to be revved to the same extent as the 3.4 to develop maximum power.
Last edited by peterp; 10-05-2018 at 12:06 AM.
10-05-2018, 03:13 PM
#26
Three Wheelin'
Great observation. The chart definitely shows peak power at 7k -- so either there is a typo in the specs or the chart is wrong. I suspect the specs are wrong since it's difficult to have a "typo" on a chart. The 4700 rpm torque peak is consistent across the chart and specs.
10-05-2018, 03:31 PM
#29
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HP is one thing, torque is another
Torque is a rotating force produced by an engine’s crankshaft. The more torque an engine produces, the greater its ability to perform work. The measurement is the same as work, but slightly different. Since torque is a vector (acting in a certain direction), it’s quantified by the units pound-feet and newton-meters. When the torque curve falls off, the ability to perform work (move the car thru the air and tire friction loss) lessens.
Berra’s theorem, torque is the capacity to do work, while power is how quickly some strenuous task can be accomplished. In other words, power is the rate of completing work (or applying torque) in a given amount of time. Mathematically, horsepower equals torque multiplied by rpm. H = T x rpm/5252, where H is horsepower, T is pound-feet, rpm is how fast the engine is spinning, and 5252 is a constant that makes the units jibe. So, to make more power an engine needs to generate more torque, operate at higher rpm, or both. But even at higher RPM, if the torque drops off, the car is producing less power, and that lessens the work the engine is able to do. Go ahead...kill me now. The simple rule is "stay within the maximum torque curve for maximum power", i.e, the ability to do work (move the car forward).
Torque is a rotating force produced by an engine’s crankshaft. The more torque an engine produces, the greater its ability to perform work. The measurement is the same as work, but slightly different. Since torque is a vector (acting in a certain direction), it’s quantified by the units pound-feet and newton-meters. When the torque curve falls off, the ability to perform work (move the car thru the air and tire friction loss) lessens.
Berra’s theorem, torque is the capacity to do work, while power is how quickly some strenuous task can be accomplished. In other words, power is the rate of completing work (or applying torque) in a given amount of time. Mathematically, horsepower equals torque multiplied by rpm. H = T x rpm/5252, where H is horsepower, T is pound-feet, rpm is how fast the engine is spinning, and 5252 is a constant that makes the units jibe. So, to make more power an engine needs to generate more torque, operate at higher rpm, or both. But even at higher RPM, if the torque drops off, the car is producing less power, and that lessens the work the engine is able to do. Go ahead...kill me now. The simple rule is "stay within the maximum torque curve for maximum power", i.e, the ability to do work (move the car forward).