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      07-18-2015, 12:43 AM   #23
phantomF80
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Quote:
Originally Posted by GuidoK View Post
A battery is not like gasoline. It can deliver high amps for a short period of time, but then internal resistance climbs up and heating starts. The tesla probably actively limits the current after a certain point. You can already see that with the normal models, they accelerate fast (as they should with 416 bhp) but over 90mph the acceleration drastically drops and is not anymore on par with other cars with that kind of power.

And that is strange as the tesla should accelerate even faster at those speeds compared to a conventional car because at those speeds weight is far less an issue and drag is. And the Tesla has far less drag than similar combustion cars because it has no large open grille to cool a big radiator. (a grille is aerodynamically a large windpocket).

So therefore active current limiting probably takes place as accelerating on those speeds takes a lot of energy (=current) for prolonged amount of time, and the batteries will probably overheat with that, or drastically limit their live.
Also, power = current * voltage. As voltage starts to drop, power starts to go down. But one of the biggest reasons the car doesn't accelerate as quickly at high speed is because it's a single speed gear box, and electric motors typically don't have good torque at high rpm.
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      07-18-2015, 01:49 AM   #24
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Quote:
Originally Posted by SMURFDADDY View Post
Keep in mind that traction is probably an issue due to necessitating a lower rolling resistance tire. This is how EV's and Hybrids get their mileage.
These "performance" model teslas come with Continental 5P Silent tires. I think they used to come with Michelin PSS, but owners complain they were too rough, so Continental developed a tire for them. Nothing low rolling resistance about the PSS or the 5p
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      07-18-2015, 09:13 AM   #25
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Quote:
Originally Posted by phantomF80 View Post
because it's a single speed gear box, and electric motors typically don't have good torque at high rpm.
I know torque is peak at 0rpm, but I wonder if this is the case.
I still think active power limiting takes place because the difference is just too high imho.
But i've never seen an actual measurement of the tesla motor on a limitless power supply so I guess we'll never know.
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      07-18-2015, 12:35 PM   #26
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Quote:
Originally Posted by C5driver
After 3 pulls, it'll have the acceleration of a Toyota Yaris. This is a card trick...nothing more.
Agreed, it's an impressive feat but it's all a farce... you either get a fast car or one that serves its purpose as a hybrid... hybrids need to be average 4 cyl midsize sedan speed and at a comparable price to make sense.
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      09-11-2015, 02:25 AM   #27
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This car looks good. I will test drive it this week.
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      09-11-2015, 03:56 AM   #28
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Quote:
Originally Posted by Greer View Post
This car looks good. I will test drive it this week.
Go on the highway and do a 80-130 pull.....then get into an f8x and do the same thing.
You'll be surprised how garbage the tesla will be.
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      09-11-2015, 07:51 AM   #29
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Quote:
Originally Posted by pikkagtr View Post
Go on the highway and do a 80-130 pull.....then get into an f8x and do the same thing.
You'll be surprised how garbage the tesla will be.
I don't understand how this is relevant. The ridiculous acceleration is a by product of the instantaneous torque generated by ALL electric motors. How does starting at a speed higher than any posted speed in the U.S. and accelerating to a speed that will most likely get you arrested prove anything? It's a hybrid and they're pushing battery technology which is better for everyone. Elon Musk is extremely innovative and has already had his hands in some game changing innovations (spacex, PayPal, tesla, stripe...).
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      09-11-2015, 08:10 AM   #30
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make the entire roof of the car a solar unit.
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      09-11-2015, 08:48 AM   #31
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Quote:
Originally Posted by derryck View Post
I don't understand how this is relevant. The ridiculous acceleration is a by product of the instantaneous torque generated by ALL electric motors. How does starting at a speed higher than any posted speed in the U.S. and accelerating to a speed that will most likely get you arrested prove anything? It's a hybrid and they're pushing battery technology which is better for everyone. Elon Musk is extremely innovative and has already had his hands in some game changing innovations (spacex, PayPal, tesla, stripe...).
Agreed. This is a daily driver. I personally have no need to accelerate 80-120 each day on my way to work. Even if I did, I would own both an M3 and a P90D. Best of both worlds.
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Originally Posted by phrozen06 View Post
make the entire roof of the car a solar unit.
The amount of roof space on the Model S would be good enough to run a fan. Not even the AC.
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      09-11-2015, 01:05 PM   #32
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The pano roof is very nice. I would definitely NOT want a solar panel to block it out...

Enjoy the test drive. Don't throw up due to too much acceleration/breaking.
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      09-13-2015, 07:12 PM   #33
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My opinion may be biased (former employee) but honestly I think that a Model S (regardless if its a 90D or a 70D) is the prefect daily driver.

Heres why:
- AWD
- Less components that a ICE (internal combustion engine)
- Software updates wirelessly
- Charge at home, at EV stations, or supercharging stations
- Safest car ever produced
- Of course with the 90D you will get a 0 to 60 of 2.8
- too much to list lol.

In all seriousness a Tesla will not compete at a track, nor can it. So if you have the capital get a Tesla as a DD and have a car specifically for track. I'm sure we are all guilty of "spirited driving" but in reality / legally drivers shouldn't be racing or doing 80 - 130 pulls on public roads.

On a side note: I wouldn't be surprised if in the near future more and more sport cars (such as M3) have hybrid capabilities.

If you have any questions Tesla related feel free to ask me or PM.

Cheers
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      09-15-2015, 01:42 AM   #34
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Quote:
Originally Posted by pikkagtr View Post
Go on the highway and do a 80-130 pull.....then get into an f8x and do the same thing.
You'll be surprised how garbage the tesla will be.
I own a F10 M5 and I never do 80-130 pulls on a public roads, I cherish my driving rights and want to keep them.
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      09-21-2015, 07:25 PM   #35
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I was stopped next to an 85D at a stoplight. I had no intention of racing, but I think the guy wanted to get ahead of me to get into my lane to make a right, so he gunned it as soon as the light turned green.

By the time I pressed the clutch pedal down, he was just... gone. I guess there are some practical applications for sheer brute force on the street .
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      09-21-2015, 08:12 PM   #36
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I like the technology behind it, but am waiting on a version that looks less bland with a decent interior.
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      09-21-2015, 08:40 PM   #37
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Quote:
Originally Posted by derryck View Post
I don't understand how this is relevant. The ridiculous acceleration is a by product of the instantaneous torque generated by ALL electric motors. How does starting at a speed higher than any posted speed in the U.S. and accelerating to a speed that will most likely get you arrested prove anything? It's a hybrid and they're pushing battery technology which is better for everyone. Elon Musk is extremely innovative and has already had his hands in some game changing innovations (spacex, PayPal, tesla, stripe...).
Texas has numerous highways with 85mph speed limits.
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      09-22-2015, 04:15 PM   #38
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Quote:
Originally Posted by derryck View Post
I don't understand how this is relevant. The ridiculous acceleration is a by product of the instantaneous torque generated by ALL electric motors. How does starting at a speed higher than any posted speed in the U.S. and accelerating to a speed that will most likely get you arrested prove anything? It's a hybrid and they're pushing battery technology which is better for everyone. Elon Musk is extremely innovative and has already had his hands in some game changing innovations (spacex, PayPal, tesla, stripe...).
The Tesla S is not a hybrid...


It's a battery-eletric vehicle.


It only has one method of propulsion...


A chemical battery-powered electric motor...
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      09-22-2015, 06:34 PM   #39
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Quote:
Originally Posted by skru_fase View Post
Tesla needs to find a new gimmick. Most people drive these cars in urban areas, so 0-60 acceleration is of limited use in traffic/cities especially at this level.
I think it's exactly opposite. In urban areas, i.e. stoplight to stoplight, torque is much more desirable than total horsepower imho. Horsepower is how fast a car can ultimately go, torque is how fast a car can get to that top speed. I'll take torque any day in urban settings. Teslas have mad torque.
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      09-22-2015, 08:26 PM   #40
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I don't understand the point of this type of acceleration for an everyday car. I am highly anticipating the model iii because I don't want to continue paying gas expenses for a DD. I want a DD (a electric sedan if possible) and a fun car (a sporty coupe if possible).

I understand not everyone can have this arrangement and it is a more expensive set up to maintain but personally I don't need my family friendly DD to be capable of GTR/TTS acceleration.

Yes, a 90D (or a 85 S for that matter) would smoke me from 0-60 if was in, let's say a 335i, but I promise you if we had to do a work commute I would get from A-B just as quickly no problem.
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