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Tesla Roadster

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Re: Tesla Roadster

#651

Post by tmzt »

greglindahl wrote: post #202
0xbear wrote: post #80

Earlier quoted context omitted.

Too bad it can’t maintain that performance for any extended period of time. Battery is known to overheat if you drive it too hard.

If you look at Teslas, they have a grill in the front that sends air to a radiator that's shared by the battery cooling system and the cabin air conditioning. For S and X and 3, it's not beefy enough to handle an extended period of time. Also, the engine has to radiate heat. So, you're boldly predicting that Tesla, which understands basic physics well enough that their existing cars accelerate well and don't burst in…

Could the make the whole rear a cooling system as you described, with radiators in aerodynamic flow.

Also guessing that a 300k P4-AWDD will be announced at some point.

Re: Tesla Roadster

#652

Post by justin66 »

Neil44 wrote: post #219
ardit33 wrote: post #17

The Tesla roadster specs are insane! No exotic carmaker will be able to match it (taking price as a consideration). (no Ferrari, or Lambo, can get that close. This is Formula 1 acceleration speeds). Plus 620 miles of range, and it is a 4 seater. Expensive as hell, but this is exotic car territory. Base Specs Acceleration 0-60 mph1.9 sec Acceleration 0-100 mph4.2 sec Acceleration 1/4 mile8.8 sec Top SpeedOver 250 mph…

Paper stats are one thing but show me this beating even something like a GT3 in an actual circuit race, or posting a Nurburgring time worthy of the price tag. I’m sure in another 5 or 10 years they’ll get there but these figures are for headlines not the track.

> Paper stats are one thing but show me this beating even something like a GT3 in an actual circuit race, or posting a Nurburgring time worthy of the price tag.

An actual race is one thing: you wouldn't expect most "supercars" to finish an actual race without being torn down and rebuilt for the race. I have no idea how you'd prepare something like a Bugatti for an endurance race, but I know the end result wouldn't be worth the expense. GT3 cars are a pretty good example of something bridging the gap. (On the other hand, the Bugatti is said to be a pleasant car to drive on the street, which I wouldn't necessarily expect out of a GT3 car.)

One lap at Nurburgring? I imagine Tesla can swing that. It seems like it would just be function of keeping the battery cool enough. If they found a way to air cool the battery effectively at speed, Nurburgring is a pretty friendly track for that.

Re: Tesla Roadster

#653

Post by Sohcahtoa82 »

Robotbeat wrote: post #542
ConsumerLed wrote: post #244

Earlier quoted context omitted.

Rolling acceleration and track handling are more important than Drag racing. Bit fed up of 0-60 times being such an important feature. 50-70 more important, handling a bit more important again. And of course for most people build quality, running costs and environmental credentials.

The car also has record-setting 0-100mph times. And I'd argue for most uses, 0-45mph is more important, and all electric cars pretty much do awesome there.

> and all electric cars pretty much do awesome there

The Chevy Bolt with its 6.5 sec 0-60 begs to differ.

Re: Tesla Roadster

#654

Post by nawitus »

Unklejoe wrote: post #607
runeks wrote: post #591

Earlier quoted context omitted.

> Even if they had to put slicks on the car to reach that time, that still puts it on par with 1000 HP dedicated drag cars. Horsepower is a misleading figure, because 1000 HP means a maximum of 1000 HP at some engine RPM. So, in other words, if a gasoline car delivers 100 HP @ 0-2000 RPM, and only delivers 1000 HP between 5500-6000 RPM, we call it 1000 HP. The Tesla delivers its power constantly, from 0 RPM and — mor…

> — its torque is also constant and available from 0 RPM I don't think torque is constant. The power is constant, and torque gradually decays as RPM increases as per the following equation: HP = Torque x RPM ÷ 5252 Most 1000 HP drag cars are in their power band from the time the driver lets go of the trans brake until the race is over (unless it's a stick shift, but most drag cars are automatic). Like any other conve…

"I don't think torque is constant."

The torque is constant for the first 40% of the RPM, something like this:

http://image.motorcyclistonline.com/f/30634938/122_0910_03_z... http://www.global-greenhouse-warming.com/images/TeslaTorqueg...

The horse power increases gradually as RPM increases.

Re: Tesla Roadster

#655

Post by narvind »

PunchTornado wrote: post #475
dkhenry wrote: post #448

Earlier quoted context omitted.

You have been reading too many finance blogs. Their finances are far from a mess, they are just not what finance people like to see. They have cash on hand and a roadmap to execute on. If they don't execute they will go out of business, and they will take my money as an investor with them. I'm OK with that and as long as they continue to have a path to profitability I am all on board. I want to see them burning money…

Exactly. As a small investor in them I fully support them. Even if I lose all my money I know it went to cool research that has benefit the progress of science in a cool way.

you are a good person.

Re: Tesla Roadster

#656

Post by Sohcahtoa82 »

TimTheTinker wrote: post #598
Sohcahtoa82 wrote: post #590

Earlier quoted context omitted.

God damn....that acceleration is almost cartoon-like. I'm kinda sad about the $200k price tag. I was planning on budgeting $125k for my next car in 2022. Obviously options have yet to be announced, but I'd really like to see a 100 kwh option for a cheaper price. That would give about a 300 mile range which would be plenty for me. Considering they announced 200 kwh as the base though, I'm not exactly holding my breath…

Despair not. The new Roadster will likely have some good competition by 2022.

I hope so.

I've been waiting for details on the next Roadster for quite a while now, really on the edge of my seat for the price. My plan was to get a Nissan GT-R in 2021 if the Roadster ended up being too expensive.

But since it was announced and too expensive, I'm still on the fence. I don't want to spend $120k on a GT-R and feel disappointed that I settled. I'm thinking I'll just have to save money for a couple years to make a serious down payment. Maybe I'll pick one up used depending on what kind of warranty Tesla will offer on a used one.

Re: Tesla Roadster

#657

Post by bradlys »

erik_seaberg wrote: post #121
thebluehawk wrote: post #83

Earlier quoted context omitted.

As a Tesla Model S owner, you really don't need to fill your car in minutes. It's a totally different (but not bad) mindset. Every morning my car is full, because I plug it in in my garage. So if I don't go more than 260 miles that day, it's plugged in the next night. It doesn't matter that it takes a few hours. My gas car was just sitting in the garage each night anyway doing nothing. How many hours does your car si…

I've never had a private garage, much less a locked one I could rewire. If Tesla wants to go mainstream they need to handle apartment parking.

More like they need to handle street parking. I live in the bay area, live in an in-law unit, and can only use street parking. Even then, this house would need some serious rewiring to be able to charge that car in any kind of reasonable amount of time. The woes of 1930's homes.

Re: Tesla Roadster

#658

Post by Robotbeat »

illumin8 wrote: post #649
Robotbeat wrote: post #509

Earlier quoted context omitted.

They DID show a monster of a pickup truck at the unveiling as well. It's almost like a /second/ roadster but aimed at the millionaire truck lover. Of course, they aren't taking reservations for that because someone probably convinced Musk the number of rich truck lovers who also would love electric is small enough that it's not yet worth spending too much energy on the idea.

They did? I watched it and never saw a pickup truck.

Here: https://electrek.co/2017/11/17/tesla-pickup-truck-first-imag...

It's based on the semi truck. They didn't announce reservations for it or anything. It might be fair to call it a concept truck at this time, but I doubt it's the last we'll see of it.

Re: Tesla Roadster

#659

Post by dmode »

Sohcahtoa82 wrote: post #590
TimTheTinker wrote: post #141

Earlier quoted context omitted.

This isn’t CGI :-) https://mobile.twitter.com/DavidHodge/status/931391188065705...

God damn....that acceleration is almost cartoon-like. I'm kinda sad about the $200k price tag. I was planning on budgeting $125k for my next car in 2022. Obviously options have yet to be announced, but I'd really like to see a 100 kwh option for a cheaper price. That would give about a 300 mile range which would be plenty for me. Considering they announced 200 kwh as the base though, I'm not exactly holding my breath…

You can probably get a P150D or whatever it will be at that time. Which will give you Roadster like acceleration, probably 400-500 mile range, and will still be a family sedan.

Re: Tesla Roadster

#660

Post by Florin_Andrei »

Unklejoe wrote: post #480

Has the 8 second quarter mile been confirmed to be done in stock trim (i.e., no special tires or other modifications)? The reason I ask is because that is EXTREMELY impressive. I tune EFI systems on race cars as a hobby, and any car in the 8 second range usually needs to run slicks or drag radials to have enough traction. Even all wheel drive cars (GTRs, DSMs, EVOs, etc.) usually run 4 slicks once they get to that sp…

> I tune EFI systems on race cars as a hobby, and any car in the 8 second range usually needs to run slicks or drag radials to have enough traction.

Right, but you're comparing what is ultimately powered by the good old Karl Benz design from the 1880s, burning dinosaur juice, that has zero torque at zero RPM, needs to shift gears multiple times, and is about as responsive to control inputs as a cow munching on marijuana leaves - with a very different thing powered by something that has maximum torque at any RPM, has no gears, and responds to control inputs extremely quickly and with immense precision.

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