Tesla Model S P85D Versus Nissan GT-R – Drag Race Video

AUG 23 2015 BY ELECTRICCARSTV 19

800 HP GT-R

800 HP GT-R

In this DragTimes video, a Tesla Model S P85D takes on an 800-hp, modified Nissan GT-R.

The P85D is a rocket off the line, but the GT-R has some serious top-end acceleration, so it’s only a matter of time before the modded Nissan caches the Tesla.

We never tire of the Tesla’s launch though.  It’s truly mind blowing how quickly it moves out.

Categories: Racing, Tesla

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19 Comments on "Tesla Model S P85D Versus Nissan GT-R – Drag Race Video"

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Taser54

GTR was asleep at the launch.

Dorkus Malorkus

I was just going to say that… The GT-R is “a rocket off the line” as well, it just left 0.4s later, LOL.

pjwood1

Tesla jumped ahead of the green. That’s what the video shows me.

Anti-See Through

it did, by around a third to a half second.

Lad

The Tesla runs well on short sprints; but, can’t run a full lap for two miles without overheating the driveline. Perhaps it’s time to try install a transmission in Teslas.

jelloslug

Why would you want to make it worse?

Dorkus Malorkus

It’s not “worse” if you are some fruitcake who enjoys paying hundreds of dollars to spend a day driving in circles for 20 minutes at a time. Then, it would very much be “better” for your purposes.

JakeY

I think you misunderstood his point. Installing a transmission (which adds additional loss to heat) will not help matters.

The core issue is the rotor heating up at high power output (battery is the next issue after that). A transmission would not help with that.

Pushmi-Pullyu

How much would it help to reduce the speed at which the rotor turns, by using a transmission to lower the running speed of the motor?

If using a transmission can keep the motor running in a band of speed with better efficiency, and thus lower the amount of waste heat emitted, then this will help with the overheating problem.

But I realize the problem is the rate at which the motor heats up. If the rate of heating is quite fast, then even using a liquid cooling system with a pump and radiator, like a gasmobile’s engine, won’t solve the problem.

BravelilToaster

Nah, sorry, the motor heats up because of the amount of power you’re putting through it, not the RPM at which it turns. It’s not like an ICE where power *comes* from heat, heat is a *result* of power. More specifically, the amount of electrical resistance inside the motor.

Anti-See Through

Spot on. Which is why the best way to solve heating problems is to design superior cooling solutions.

Pushmi-Pullyu
Okay, so how do Formula E racers avoid the overheating problem? They use a five-speed transmission. Maybe that has nothing to do with solving the heat problem, but I’m betting it does. Yes, it’s certainly true that an ICEngine is a heat engine, and an electric motor is not. Therefore, it’s true that the ICEngine has to generate heat to produce power, whereas the electric motor doesn’t. But every motor, whether it’s an ICEngine or an EV’s electric motor, has a certain speed band in which it runs most efficiently. Run the motor faster, outside of that band, and the efficiency drops… which means the amount of energy lost to heat increases. Take a look at this graph of motor/inverter efficiency contours: http://www.techno-fandom.org/~hobbit/cars/ornl-motor-efficiency.gif For that particular motor/inverter, if you can keep the EV’s motor running in the RPM range that gives it a 92% efficiency, then that’s only 8% of the power lost to waste heat. But if you run it a lot faster, the efficiency can drop to 86%, or 14% power lost to waste heat. Obviously that’s a big difference in how much heat the motor is generating, which will be very important if you’re trying to prevent… Read more »
Pushmi-Pullyu

Lad said:

“Perhaps it’s time to try install a transmission in Teslas.”

Perhaps you are not aware that Tesla tried to put a two-speed transmission into the Roadster. After two different transmissions from two different vendors failed to hold up in use, due to the very high torque from the powerful electric motor, Tesla gave up on the idea.

Similarly, the Wrightspeed X-1 EV racecar was modified to use an electric powertrain, but its transmission was locked to a single gear and the other gears stripped out.

But, to argue your side of the case, Formula E race cars do use a five-speed transmission.

No production EV uses a transmission, and I think that will likely remain the case. Only actual EV race cars have sufficient need for a transmission to benefit from one. And if a race car “blows” its transmission, then replacing that is just part of the high cost of racing.

I don’t think Formula E racecars are street legal. Mass market automobiles can’t be built using a transmission which will have to be replaced frequently. So no, it is not time for Tesla to consider that again.

Djoni

Formula E sure had 5 speeds transmission last year.
This year Venturi drop one gear in his setup
http://insideevs.com/venturi-presents-formula-e-electric-motor/
And they will probably loose more as the motor/inverter/battery will be open to team work.
Beside that Formula E is in a performance group and budget far more eleborated than street car, like Tesla.
Nevertheless, you should see Zombi 222 blast a S85P like a rocket.
The GT-R would not be a close match either.
Ans I am not sure Zombi as many gear to play with.

BraveLilToaster

It totally doesn’t, actually. *Sometimes* they use a 2-speed transmission, under certain circumstances, but those circumstances *aren’t* the 1/4 mile.

The fact is that electric motors don’t have the constraint of not being able to run at 0 RPM like gas engines have. They also don’t have the constraint of having peak torque at something like 7,000 RPM – their peak torque is at 0 RPM, and it typically stays that way through to about half its peak RPM. So what you do instead is measure the amount of torque your motor can provide, figure out what speed it will peak at, and then provide the single gear necessary to carry you to that speed at maximum acceleration.

ModernMarvelFan

The old tired arguement that Roadster blow up its 2 speed therefore it can’t be done due to too much torque is completely BS. As you said, Formula E is doing it.

It can be done. But NOT necessarily for the cost Tesla want.

Personally, I don’t think Model S would need more than 2-3 gears at MOST.

Gears help with efficiency and top speed. Electric motors still run out of rpm band despite its wide power band. Model S’s 9.75:1 ratio cause the car to reach its max torque at 43mph and max power around 71mph. Those figures are plenty for “normal” road use, but for tracks, they are far from enough.

Adding at least 1 additional gear would allow the Model S to have higher top speed and better top end acceleration.

It would also allow the motor to operate more efficient at lower speed by reducting RPM which increase back-EMF (which results in much higher heat generation due to the higher voltage required to overcome the back EMF).

Pushmi-Pullyu
Hmmm, I just posted a reply comment above saying many of the same things. However, ModernMarvelFan, I’m not at all convinced the Model S, or any other production BEV, would benefit from a transmission. For a dedicated racecar, frequently replacing the transmission might be considered just part of the high cost of competing in races. But no auto maker is going to build and sell a mass produced car which has to have the transmission replaced every few weeks or few months. If you think it’s merely a matter of trying harder to build a transmission robust enough to handle the Model S’s very high torque… well, point to a production BEV that uses a transmission, then. But you can’t, can you? Not even high-end supercar BEVs which are much more expensive than the Tesla Model S use a transmission. That should be a hint, ModernMarvelFan. If nobody does it, then there’s probably a good reason. Telsa, as a brand new car manufacturer with the Roadster, had to find out the hard way. Auto makers with more experience building high-end performance cars, auto makers like Ferrari, Lamborghini, etc., were probably able to figure that out before actually building their concept… Read more »
Djoni

Again, there is possible gain in performance if you put a transmission in a BEV.
Wether it is a half second faster acceleration at some specific sped or a higher top speed of 5-10%.
But those are marginal and not suited to “civil” car, becaus it come with the added cost, complexity and reliability issue.
In a race context, this tiny bit of improvement is of course a matter of win or loose.
Just comparing apple to orange though.

I’ll bet that even in racing, the number of gear will go down with improvment of motors/battery/inverter, because it could reduce weight,avoid the time lost in shifting, enhance the driving and also the durability of the car.
We’ll see

Anonymous

Anyone know how much additional cost it took to get that GT-r up to it’s current specs?