Any REST peak KW readings for 85D?

sorka · May 18, 2015

Just collecting some data and I can get all I need for the PD from myself but don't have an 85D.

Looking for WOT data for 85D at various SOCs.

0-60 runs or WOT passes.

brianman · May 18, 2015

Might want to expand the acronym (WOT) at least once.

rdrcrmatt · May 18, 2015

wide open throttle

My P85 I've seen 374 kw when I was recording. I haven't been running a REST/Streaming API recording in a while.

brianman · May 18, 2015

rdrcrmatt said:
wide open throttle

My P85 I've seen 374 kw when I was recording. I haven't been running a REST/Streaming API recording in a while.

Beats my data. My highest was 363 on the first drive unit.

apacheguy · May 18, 2015

IIRC an owner reported max 345 kW in his newish P85 at high SOC. I've tested my refurbed DU and compared it to my original and I see lower peak power outputs. I've tested this multiple times under varying conditions. Not sure what explains all this car to car variability.

brianman · May 18, 2015

apacheguy said:
IIRC an owner reported max 345 kW in his newish P85 at high SOC. I've tested my refurbed DU and compared it to my original and I see lower peak power outputs. I've tested this multiple times under varying conditions. Not sure what explains all this car to car variability.

Apacheguy, don't freak out....

rdrcrmatt said:
I'm about to hit 60k!
I hit 50k on new years eve.

rdrcrmatt said:
wide open throttle
My P85 I've seen 374 kw when I was recording. I haven't been running a REST/Streaming API recording in a while.

Are you on the original drive unit, rdrcrmatt? Or rather, more specifically, is your 374 kW number from the original drive unit?

sorka · May 18, 2015

Anyone out there with an 85D with some numbers?

SomeJoe7777 · May 18, 2015

This is not REST API data, but is from a dyno app:

https://network.perfexpert-app.com/results/IFML9GbQCz

Stoneymonster · May 18, 2015

I can't find my old thread right now with all the data, but I recall hitting 371KW on the 0-60 runs.

Here it is: Upgraded 85D? - Page 6

sorka · May 18, 2015

Do you recall the SOC for that run? Depending on the SOC that's even higher than the P85D at times.

apacheguy · May 18, 2015

brianman said:
Apacheguy, don't freak out....

Ok. Time out. Nobody's freaking out here.

i have my own theory, as explained previously in other threads, that new DU inverters have better efficiency, but power to the drivetrain remains the same. That theory didn't get any traction on here so I was just throwing out some bait here to see if we could get any other conjectures. I hope my intentions are clear to you now.

Stoneymonster · May 18, 2015

sorka said:
Do you recall the SOC for that run? Depending on the SOC that's even higher than the P85D at times.

80% +/- 2%

sorka · May 18, 2015

That's just about what the P85D was at that SOC prior to 6.2.167. With 167 and later, it's 396 KW at 81%.

So the 85D really isn't making that much less from a rolling 50+ mph start.

Stoneymonster · May 18, 2015

sorka said:
That's just about what the P85D was at that SOC prior to 6.2.167. With 167 and later, it's 396 KW at 81%.

So the 85D really isn't making that much less from a rolling 50+ mph start.

That's peak though. The P85D ramps up much much faster to peak output.

Edit: oops, I just read what you said closer. Yes, that's possible.

sorka · May 19, 2015

Stoneymonster said:
That's peak though. The P85D ramps up much much faster to peak output.

Edit: oops, I just read what you said closer. Yes, that's possible.

Yup. Totally true which is why the 0-60 is soooooo much faster on the P85D. The P85D is like a vertical climb at the beginning while the 85D is a much more gradual slope so the total power under the curve on the way to 60 is has much more area under it. I was more curious as to how the real peak compared between the two when already at speed say punching it from 50-70.

rdrcrmatt · May 19, 2015

brianman said:
Apacheguy, don't freak out....

Are you on the original drive unit, rdrcrmatt? Or rather, more specifically, is your 374 kW number from the original drive unit?

That reading was while I had the car on a dyno, around 95% SOC, second (and current) drive unit. And around 47,000 miles on the car.

It put down 390hp in that run.

apacheguy · May 19, 2015

sorka said:
Yup. Totally true which is why the 0-60 is soooooo much faster on the P85D. The P85D is like a vertical climb at the beginning while the 85D is a much more gradual slope so the total power under the curve on the way to 60 is has much more area under it. I was more curious as to how the real peak compared between the two when already at speed say punching it from 50-70.

What is it about the 85D motors that allow them to achieve roughly the same peak output, but yet they climb at a slower rate? I've asked this question before as it applies to the S85 v the P85, but no one has been able to explain it.

The only factor that should limit the climbing rate is TC. Do the PDs have better TC somehow?

Cottonwood · May 19, 2015

apacheguy said:
What is it about the 85D motors that allow them to achieve roughly the same peak output, but yet they climb at a slower rate? I've asked this question before as it applies to the S85 v the P85, but no one has been able to explain it.

The only factor that should limit the climbing rate is TC. Do the PDs have better TC somehow?

Maximum torque from the inverter/motors and traction are both limits to low end acceleration. Power is torque times RPM. Because the MS has one fixed gear, RPM is proportional to speed. A lower maximum torque gives you a lower acceleration and a lower power at any given speed until you hit the power limit. Power then rises linearly with speed until you hit the power limit.

It is probable, that on good dry surfaces, the P85D has more torque than the tires can accept and TC limits max torque, but the 85D does not have enough torque to test the TC with good traction.

sorka · May 19, 2015

apacheguy said:
What is it about the 85D motors that allow them to achieve roughly the same peak output, but yet they climb at a slower rate? I've asked this question before as it applies to the S85 v the P85, but no one has been able to explain it.

The only factor that should limit the climbing rate is TC. Do the PDs have better TC somehow?

I'm sure the answer is partly a software policy decision. But keep in mind, that the comparison I made was at an 80% SOC. The difference is more the higher the SOC is on both models. At 90%, the PD is outputting 414KW but I'll bet the 85D doesn't output any more at that.

I'll also bet that 85D doesn't output less as the SOC drops a lot lower. At some point, there will be an SOC on both models where the output is the same.

brianman · May 19, 2015

apacheguy said:
Ok. Time out. Nobody's freaking out here.

i have my own theory, as explained previously in other threads, that new DU inverters have better efficiency, but power to the drivetrain remains the same. That theory didn't get any traction on here so I was just throwing out some bait here to see if we could get any other conjectures. I hope my intentions are clear to you now.

I was just teasing you (context: a lot of old, post-heavy threads).

Any REST peak KW readings for 85D?

Well-Known Member

Burrito Founder

Member

Burrito Founder

S Sig #255

Burrito Founder

Well-Known Member

Marginally-Known Member

Active Member

Well-Known Member

S Sig #255

Active Member

Well-Known Member

Active Member

Well-Known Member

Member

S Sig #255

Roadster#433, Model S#S37

Well-Known Member

Burrito Founder

Similar threads