Comparing the S2000 with the Boxster 2.7 and Boxster S
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From: Lisbon
Originally posted by Utah S2K
Nice chart but essentially useless without a note on vehicle weights....or am I missing something? There are 300 HP V-8's I knock off on a regular basis in my neighborhood.
Nice chart but essentially useless without a note on vehicle weights....or am I missing something? There are 300 HP V-8's I knock off on a regular basis in my neighborhood.
As stated before on this thread the MAW for the Boxster 2.7 and the S2000 is about the same.
Actually if you think about it, there is very little information out there that is really useless... You just need to know how to use it.
!
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From: The wilds of
You and Luis are just caught up in semantics. The definition of torque does not include a lever length -- it's the twisting force applied to a shaft.
To use your analogy, you can twist a shaft by putting a lever on it and pushing. The longer the lever, the less force you have to exert on it to achieve a given level of torque on the shaft. But the shaft itself doesn't care how long the lever is. The torque on the shaft is the same whether you have 1 pound of force on a 1 foot lever or 2 pounds on a 6-inch lever.
Applying this to a car, the shaft moves the lever. The torque at the rear axle shaft is not affected by the size of the wheel, by definition. But since the wheel is a lever, its diameter does affect the amount of linear force applied to the road.
Of course, practically speaking everyone who fits larger wheels also uses lower profile tires in order to keep the overall diameter the same, for this exact reason. You don't want to decrease your thrust by fitting larger wheels.
To use your analogy, you can twist a shaft by putting a lever on it and pushing. The longer the lever, the less force you have to exert on it to achieve a given level of torque on the shaft. But the shaft itself doesn't care how long the lever is. The torque on the shaft is the same whether you have 1 pound of force on a 1 foot lever or 2 pounds on a 6-inch lever.
Applying this to a car, the shaft moves the lever. The torque at the rear axle shaft is not affected by the size of the wheel, by definition. But since the wheel is a lever, its diameter does affect the amount of linear force applied to the road.
Of course, practically speaking everyone who fits larger wheels also uses lower profile tires in order to keep the overall diameter the same, for this exact reason. You don't want to decrease your thrust by fitting larger wheels.
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From: The wilds of
Originally posted by hpalmer
...As the ratio change caused by the tire diameter affects only the torque seen at the ground....
...As the ratio change caused by the tire diameter affects only the torque seen at the ground....
In order to calculate torque, a rear wheel dynamometer actually measures the braking force needed to hold the rotating wheel at a constant speed with the throttle wide open. Torque is then calculated by factoring in wheel diameter (for torque at the drive wheel shafts) and also differential and transmission gearing (for torque at the flywheel). I've never actually watched this done, but I assume that modern drive-wheel dynamometers have computers that do all these calculations (after you key in the data on wheels and gears) and just spit out the numbers.
Regarding wheel size, wheels and tires may get chosen for reasons other than engineering ones, like cost and style. But you can be sure the engineering guys adjust the gearing to match the wheel diameter so the car gets the best use out of its power band. So the wheel diameters may be different between the S2000 and the Boxster, but it will have been accounted for in their gearing. The S2000 is geared short because the engineers wanted it that way, not because the wheels are small.
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From: Honolulu/Kona,HI
It's hard to compare the two because of their close similarities
in performance, which is the better car you ask, a lot of
car enthusiasts would probably pick the Porsche, just for
the fact that it's a PORSCHE. A lot of so called enthusiasts
don't have a clue to HONDA'S racing achievements and still
think Honda is still an economy car. but they get a chance to
actually drive a s2k, they're very impressed.
Alot of people do not like the interior of the s2k, but for me,
it's nearly perfect; it's not cluttered with to much luxury items
and keeps the driver feel like they're in a sports car and
more focused,
The Boxster disappointed me because they did away with
the traditional interior which was half of what a Porsche was
all about.
The Boxster S is a gorgeous car and so is the s2k, but I think
the front of the s2k is nicer and the back of the Boxster is
nicer.
The s2k is much easier to drive in the rain because of the
''not too much torque'' but on the dry, both cars are equal.
Though it feels better in the s2k, it is identical in performance
nonetheless.
I gotta give the Boxster praise to the sound the engine
and exhaust it produces, not a ferrari, but music to my ears
If you read a lot of European mags, they say the s2k is actually
a faster car, but you gotta really drive it hard and launch it
at a pretty high rpm in order to beat the Boxster
All in all, it will be an ongoing battle between the two;
the s2k and it's closest competitor, the Boxster S.
( Though I prefer the s2k over the Boxster S )
in performance, which is the better car you ask, a lot of
car enthusiasts would probably pick the Porsche, just for
the fact that it's a PORSCHE. A lot of so called enthusiasts
don't have a clue to HONDA'S racing achievements and still
think Honda is still an economy car. but they get a chance to
actually drive a s2k, they're very impressed.
Alot of people do not like the interior of the s2k, but for me,
it's nearly perfect; it's not cluttered with to much luxury items
and keeps the driver feel like they're in a sports car and
more focused,
The Boxster disappointed me because they did away with
the traditional interior which was half of what a Porsche was
all about.
The Boxster S is a gorgeous car and so is the s2k, but I think
the front of the s2k is nicer and the back of the Boxster is
nicer.
The s2k is much easier to drive in the rain because of the
''not too much torque'' but on the dry, both cars are equal.
Though it feels better in the s2k, it is identical in performance
nonetheless.
I gotta give the Boxster praise to the sound the engine
and exhaust it produces, not a ferrari, but music to my ears
If you read a lot of European mags, they say the s2k is actually
a faster car, but you gotta really drive it hard and launch it
at a pretty high rpm in order to beat the Boxster
All in all, it will be an ongoing battle between the two;
the s2k and it's closest competitor, the Boxster S.
( Though I prefer the s2k over the Boxster S )
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From: whittier
argue argue argue.... its just plain simple think of the 10 speed bicycle. think of the rear sprocket as the the rear wheels the larger sprocket the harder it is to turn it correct? the smaller the easier right? so it makes sense that more turning force get put to the ground if the rear sprocket is smaller or in this case tires are smaller. if you use larger wheels then you would need to adjust the gear ratio in the rear to help or increase the amount of tourqe that makes it to the ground . since this is whats most important anyways who cares about flywheel horses or tourqe. just my opinion.. hope it helps