MYP SOC% vs performance with Dragy!

[Fourdoor]

Hey guys,

Since I spent money on the Dragy I am going to try and get my moneys worth out of it!

I am going to post 0-60, 1/8 mile, 1/4 mile and 0-60 with 1' rollout for both sport and chill mode at 10%, 25%, 50%, 75% and 100% SOC.

First data point I started driving to my testing location at around 12% SOC, and after testing when I arrived home I was at 8%... I will call that my 10% SOC test. Each test will get two runs in sport and two runs in Chill with the best run results posted here. I did remember to turn off climate control this time... last time I did dragy runs it was with the AC blasting... not sure if that makes a difference.

Sport mode:

0-60 4.33 sec 0.75% slope
0-60 with 1' rollout 4.13 sec 0.75% slope
1/8th mile 8.26 sec at 82.98 mph 0.32% slope
1/4 mile 13.09 sec at 100.44 mph 0.32% slope

Chill mode:

0-60 7.61 sec 0.27% slope
0-60 with 1' rollout 7.31 sec 0.27% slope
1/8th mile 10.30 sec at 72.91 mph -0.07% slope
1/4 mile 15.65 sec at 92.24 mph -0.07% slope

I am charging the car now, and will post 25% results in an hour or so, other percentages later as the car charges.

Later,

Keith

 

[Fourdoor]

Looks like each test uses around 6% SOC round trip (driving out and back with two Sport acceleration runs and two Chill acceleration runs). This time I charged to 27% and returned with 21% for my "25% SOC" test. For the 50% I think I will charge to 53% before starting... that will be about 3.5 hours from now

Results!

Sport mode:

0-60 4.01 sec 0.17% slope
0-60 with 1' rollout 3.81 sec 0.17% slope
1/8th mile 7.99 sec at 87.85 mph -0.12% slope
1/4 mile 12.54 sec at 106.85 mph -0.12% slope

Chill mode:

0-60 7.59 sec -0.36% slope
0-60 with 1' rollout 7.31 sec -0.36% slope
1/8th mile 10.29 sec at 72.89 mph -0.25% slope
1/4 mile 15.64 sec at 92.14 mph -0.25% slope

So far, going from 10% to 25% has had zero effect in Chill mode and a significant effect in Sport mode. Gains are 0.32 seconds in the 0-60. 1/8 mile improved by 0.27 seconds and 4.87 mph. The 1/4 mile improved by 0.55 seconds and 6.41 mph.

Later,

Keith

 

[03DSG]

Keep them coming. Interesting.

 

[whisperingshad]

With or without AB?

 

[Stach]

With or without AB?

He has a MY Performance, so no AB possible.

 

[Fourdoor]

Yup each test uses around 6% SOC round trip (driving out and back with two Sport acceleration runs and two Chill acceleration runs). This time I charged to 53% and returned with 47% for my "50% SOC" test.

Results!

Sport mode:

0-60 3.89 sec 0.90% slope
0-60 with 1' rollout 3.69 sec 0.90% slope
1/8th mile 7.86 sec at 90.69 mph 0.25% slope
1/4 mile 12.26 sec at 110.4 mph 0.25% slope

Chill mode:

0-60 7.58 sec 0.54% slope
0-60 with 1' rollout 7.31 sec 0.54% slope
1/8th mile 10.30 sec at 72.92 mph 0.25% slope
1/4 mile 15.66 sec at 91.92 mph 0.25% slope

So, going from 25% to 50% has had zero effect in Chill mode and a significant effect in Sport mode. Gains between 25% and 50% are 0.12 seconds in the 0-60. The 1/8 mile improved by 0.13 seconds and 2.84 mph. The 1/4 mile improved by 0.28 seconds and 3.55 mph. Total gains from 10% up to 50% 0.44 seconds on the 0-60. The total 1/8 mile improvement is 0.4 seconds and 7.71 mph. The total 1/4 mile improvement so far is 0.83 seconds and 9.96 mph.

Part of these gains on are probably due to battery heat. The 10% test was done on an "ambient" battery an hour or so after I finished driving, the 25% test the battery was probably pretty warm going from 7% up to 27%... after charging from 21% to 53% the battery was definitely fully warmed up.

Stand by for 75% testing in about 3 hours!

Later,

Keith

 

[whisperingshad]

He has a MY Performance, so no AB possible.

I was about to say wow if it wasn't ba P

 

[Fourdoor]

This time I charged to 78% and returned with 72% for my "75% SOC" test.

Results!

Sport mode:

0-60 3.86 sec 0.00% slope
0-60 with 1' rollout 3.61 sec 0.00% slope
1/8th mile 7.78 sec at 92.83 mph -0.05% slope
1/4 mile 12.07 sec at 113.25 mph -0.05% slope

Chill mode:

0-60 7.60 sec -0.71% slope
0-60 with 1' rollout 7.32 sec -0.71% slope
1/8th mile 10.29 sec at 72.88 mph- 0.30% slope
1/4 mile 15.65 sec at 91.89 mph -0.30% slope

So, going from 50% to 75% has had zero effect in Chill mode and once again a significant effect in Sport mode. Gains between 50% and 75% are 0.03 seconds in the 0-60, strangely with the 1’ rollout the improvement was 0.08 seconds. The 1/8 mile improved by 0.08 seconds and 2.14 mph. The 1/4 mile improved by 0.19 seconds and 2.85 mph. Total gains from 10% up to 75% of 0.47 seconds on the 0-60, with 0.52 sec improvement on the 0-60 with the 1’ rollout. The total 1/8 mile improvement is 0.48 seconds and 9.85 mph. The total 1/4 mile improvement so far is 1.02 seconds and 12.81 mph.


Stand by for 100% testing in about 4 hours!

Later,

Keith

PS: I see people assert that their is no performance degradation with lower SOC, in Chill mode that is 100% correct because you are not even close to exceeding the capabilities of the battery pack even at 10% SOC when in Chill mode. I wonder if the MY LR has a "broader SOC window" where it can achieve max performance than the MYP since the P taxes the capabilities of the battery more than the LR? I would love to see someone repeat my experiment in a MYLR and again in a MYLR with AB.

 

[Fourdoor]

Final report!

Left the house with 100% after allowing the cells to do their final balance.

Sport mode:

0-60 3.83 sec -0.75% slope
0-60 with 1' rollout 3.58 sec -0.75% slope
1/8th mile 7.75 sec at 93.35 mph -0.12% slope
1/4 mile 12.01 sec at 114.18 mph -0.12% slope

Chill mode:

Same as it ever was!

So, going from 75% to 100% has (as always) had zero effect in Chill mode and once again a significant effect in Sport mode. Gains between 75% and 100% are 0.03 seconds in the 0-60, and with the 1’ rollout the improvement was also 0.03 seconds. The 1/8 mile improved by 0.03 seconds and 0.52 mph. The 1/4 mile improved by 0.06 seconds and 0.93 mph. Total gains from 10% up to 100% of 0.50 seconds on the 0-60, with 0.55 sec improvement on the 0-60 with the 1’ rollout. The total 1/8 mile improvement is 0.51 seconds and 10.37 mph. The total 1/4 mile improvement is 1.08 seconds and 13.74 mph.

So, with the MYP the higher your SOC the better the performance. It would NOT make a good bracket car at the drag strip in sport mode... but it would be a killer bracket car in Chill mode! I really want to see a similar test of a MY LR and a MY LR with AB to see how (if?) SOC has a significant effect on their performance. I think that the "official" number 0-60 for the LR with AB is 4.3 seconds isn't it? So if my MYP can do 0-60 in 4.33 at 10% SOC I would think that a LR with AB would not have much if any performance degradation from SOC changes, but does having a different rear motor skew those results? Beats me! Somebody do the tests

Keith

 

[Vettepartz]

This is super-good information. Thanks for taking the time and effort to come up with this data, Keith.

 

[Fourdoor]

This is super-good information. Thanks for taking the time and effort to come up with this data, Keith.

Thanks,

I was really hoping for some 11's with the 100% charge, looks like I need to lose 100 lbs Since that is never going to happen I will try another 100% run next month after I have the 19" Gemini's, that should get me into the 11's pretty easy. It baffles me to see the 21" wheels on the performance version of the MY.

I have to say, I was disappointed with how much SOC affects acceleration. Every run was slower than the run before it even with only a small amount lower power left in the battery.

I will do some quick "HP at the wheels based on 1/4 mile times and weight of the car" number crunching and post that up. This will be based on the dragy runs and the weight of my car with me in it as measured on the truck scales at my work. These numbers will be JUST FOR FUN!

Later,

Keith

 

[jcanoe]

In the quest for the fastest time is it acceptable to remove things such as the second row seats, the cargo area floor covers and drain the washer fluid (1.2 gallon capacity)?

 

[Fourdoor]

In the quest for the fastest time is it acceptable to remove things such as the second row seats, the cargo area floor covers and drain the washer fluid (1.2 gallon capacity)?

Sure... as long as you state what extreme measures you took to achieve the times go for it! You have seen the video's of the Model S drag car with the fully stripped interior?

Keith

 

[Fourdoor]

OK, here are WHEEL HP ESTIMATES based on weight of my car on some truck scales (4720 lbs) and the 1/4 mile Elapsed Time, and Trap speed provided by Dragy. Generally for cars that are not under perfect conditions the trap speed number is considered more accurate... less of a difference in AWD cars where traction is less of an issue. When HP climbs to high levels even with AWD the trap speed becomes the more accurate number.

Chill mode 15.65 at 92.24 . . . WHP by ET = 243 . . . . WHP by trap speed = 289 . . . Average of both = 266 WHP
10% SOC 13.09 at 100.44 . . . WHP by ET = 416 . . . . WHP by trap speed = 373 . . . Average of both = 395 WHP
25% SOC 12.54 at 106.85 . . . WHP by ET = 473 . . . . WHP by trap speed = 449 . . . Average of both = 461 WHP
50% SOC 12.26 at 110.40 . . . WHP by ET = 506 . . . . WHP by trap speed = 496 . . . Average of both = 501 WHP
75% SOC 12.07 at 113.25 . . . WHP by ET = 531 . . . . WHP by trap speed = 535 . . . Average of both = 533 WHP
100% SOC 12.01 at 114.18 . . . WHP by ET = 539 . . . . WHP by trap speed = 548 . . . Average of both = 543 WHP

Later,

Keith

 

[TomServo]

The LR AWD with PB has to be the best bang for the buck. My 85% SoC runs, and it was 46 degrees and I could feel the tires clawing for grip. I need to retest now that's it HOTTER

3.94 with the 1 ft rollout

 

[LionelHutz]

Would be interested to see your metrics for a run at 85-90% (i.e., the top end of the range suggested for daily charging).

 

[Blue Magoo]

Thanks,

I was really hoping for some 11's with the 100% charge, looks like I need to lose 100 lbs Since that is never going to happen I will try another 100% run next month after I have the 19" Gemini's, that should get me into the 11's pretty easy. It baffles me to see the 21" wheels on the performance version of the MY.

I have to say, I was disappointed with how much SOC affects acceleration. Every run was slower than the run before it even with only a small amount lower power left in the battery.

I will do some quick "HP at the wheels based on 1/4 mile times and weight of the car" number crunching and post that up. This will be based on the dragy runs and the weight of my car with me in it as measured on the truck scales at my work. These numbers will be JUST FOR FUN!

Later,

Keith

Thanks,

I was really hoping for some 11's with the 100% charge, looks like I need to lose 100 lbs Since that is never going to happen I will try another 100% run next month after I have the 19" Gemini's, that should get me into the 11's pretty easy. It baffles me to see the 21" wheels on the performance version of the MY.

I have to say, I was disappointed with how much SOC affects acceleration. Every run was slower than the run before it even with only a small amount lower power left in the battery.

I will do some quick "HP at the wheels based on 1/4 mile times and weight of the car" number crunching and post that up. This will be based on the dragy runs and the weight of my car with me in it as measured on the truck scales at my work. These numbers will be JUST FOR FUN!

Later,

Keith

Thank you for your time Keith.
I put Geminis on my MYP as soon as I got it home but I don't have a Dragy to post my times yet. But even with the Geminis I was not impressed! Tesla needs to step up and give the performance owners that spent $7000 a more definitive improvement in performance for their money.
Garry

 

[PackMan730]

How much do you weigh? What items do you keep in frunk and trunk?
Just curious. Some people have 11s so wondering if weight is a factor.

 

[MTSN]

I ran 11.79 in the quarter with a MYP on 19" Geminis last weekend:

 

[jcanoe]

Higher elevation = less air resistance