Why not allow to use single motors in AWD

It does that automatically. Once you step on it, both motors engage again, that is why on average it is less.

Because driveshafts are heavy, inefficient, and would need to go right where the HV battery is located.

I was thinking that same thing recently. Turn off one of my motors for better range

To answer this in a non technical way - it doesn’t work like that. Even if you were to do this the car would not be efficient and you wouldn’t gain mileage.

It already does this. They have amazing tuning, so you don't notice it.

Now that I reread your post, I *think* I understand what you are actually asking. It does change the split in power between front and rear. I thought you were asking why AWD cannot be on one motor.

To reply to this in a non technical way - It does work like that and dual motor Teslas do work like this.

This is why an induction motor is used in the front as it incurs minimal efficiency losses when unpowered whereas a permanent magnet motor would need a full clutch disconnect system in place. Some vehicles do this look at the r1 and r1s for example.

The AWD already turns off the front motor when it's not needed (most of the time when cruising). But the weight, friction and inherent losses with CV joints equals loss of range.

Wireless, of course.

I just want the front motor off so I can drift.

You got it right. What I am saying Tesla should give option to choose whether two motors will engaged or one. Let's say best weather condition i will prefer to use one motor to get more efficiency

Why not ? Instrad of using battery for to power two motors it should power one motor

That may be dynamic. I am saying option to choose. Think in summer while driving locally i dont need that much power or traction

It does that already.

Right

Why 2 posts when one would do?

You’re over thinking it. That’s already what happens.

Get a S3XY commander; you can choose to disable the front motor in an AWD Tesla

Does it become FWD or RWD ?

Deleted my reply because I was wrong lol

He said the front motor turns off which is the same as saying it’s RWD.

You’re confused. There is no center differential on these cars. If the front motor turns off the car is RWD because only the rear wheels will be powered

It does work like that but the car is still pushing around the extra weight and the front cv axles are still causing drag so you won’t get RWD model range using an AWD model with the front motor disabled/off Op thinks just turning the motor off should make the range the same as a RWD only model

Yeah, I thought I was using that term wrong actually. But what I thought was that all four tires are still powered by one motor simultaneously that it doesn’t revert to one axle if that makes sense but I guess I’m wrong.

That would require a drive shaft running the length of the car, which incurs a ton of friction losses and adds complexity. No need for that in an EV.

I think "Track mode" let's you select a power ratio, including 100% front and 100% rear motors.

Track mode has that - only on "P" cars.

If you’ve got the performance model then turn track mode on, you can set the front/rear motor bias there.

Yea I was way off lol thanks

Interestingly the Rivian R2 they’re about to release also has a clutch disconnect for the front motor. Induction motors have their own list of disadvantages including power, efficiency (when comparing both while connected) as well as low speed control. I’m guessing for all of these reasons Rivian went for the dual permanent magnet motors. And people incorrectly assume that the unpowered (“disconnected”) induction motor does not induce any resistant… it does. So the fully clutch disconnected permanent magnet motor is more efficient than the disabled induction motor. Low speed control especially since it will absolutely make a huge difference when off roading. You’ll be able to choose whether you want to keep AWD fully enabled 100% of time or when you want it to auto connect.

You replied to the wrong person btw.

It knows what is the safest most efficient option. You aren't smarter than the car.

I was replying to you pointing out that while it does turn off the front motor it does not make the car as efficient as the RWD model which is what op was thinking would happen

I'm not sure why you're explaining it to me, when OP had the question and I replied with the answer. The person said it "Doesn't work like that" meaning turning off the front motor doesn't increase efficiency, which is wrong, it does. It just isn't enough to match a car with an entire motor missing. I think that is obvious.

Then they'll find out that's not the reason they can't drift.

And that person was talking about it not matching RWD efficiency which is what OP was asking about

No, that person stated it wasn't happening at all. "even if you were to do this" meaning that it isn't disconnecting and disconnecting wouldn't help. Please have some reading comprehension, not responding anymore, very annoying.

Hopefully it’s handled better than the r1 clunky clutch disconnect. I’ve heard lots of complaints about it.

Seems like that

I heard it’s great on R2 from reviewers. Also it’s RWD biased on r2 instead which is excellent