Search found 6 matches

by StefSonic7EV
Fri Oct 07, 2022 5:46 am
Forum: Tesla
Topic: Tuning the small drive unit with charts
Replies: 126
Views: 28022

Re: Tuning the small drive unit with charts

udcnom is 360 for me, I did not care about this parameter too much. Engine operates on a voltage from 430 to 370 V.

One of the biggest findings from the dyno for me is that powertrain losses are low 6.5% when calculating the engine power from the electrical power.

So on the full charge (I'm ...
by StefSonic7EV
Thu Oct 06, 2022 8:53 pm
Forum: Tesla
Topic: Tuning the small drive unit with charts
Replies: 126
Views: 28022

Re: Tuning the small drive unit with charts

Super interesting thread plenty of interesting observations. I was starting a similar discussion some time ago, so good to see some new facts coming in.

I finally took my car to the dyno, so hopefully the finding I share will contribute to further understanding of the SDU parameters setup.
I ...
by StefSonic7EV
Sat Oct 31, 2020 4:22 pm
Forum: Tesla
Topic: How much power the SDU really makes
Replies: 9
Views: 2951

Re: How much power the SDU really makes

I have done some extra testing to figure it out. As Isaac96 was pointing out, the readout from the idc at the inverter was not accurate (BMS data on the left):
Screenshot 2020-10-31 at 11.26.43.png
Udc looks to be correct.

I tend to think that BMS readout is correct. For this run Race Droid Pro ...
by StefSonic7EV
Sun Oct 25, 2020 5:37 pm
Forum: Tesla
Topic: How much power the SDU really makes
Replies: 9
Views: 2951

Re: How much power the SDU really makes

Let me draw the udc/idc at the inverter to get the accurate reading. Hard to argue with P=VI. I guess minus ~5% as inverter and motor have some losses. But not 40kW.

App works with 10Hz GPS really well for ICE cars, close to dyno numbers. Guess I need to go on a dyno to calibrate for electric ...
by StefSonic7EV
Sun Oct 25, 2020 3:39 pm
Forum: Tesla
Topic: How much power the SDU really makes
Replies: 9
Views: 2951

How much power the SDU really makes

hi all, this question was bothering me for some time. What is your experience, anybody dyno'ed your car with the SDU?

A friend of mine created this app RaceDroid Pro, coupled with 10Hz GPS (Garmin Glo) I have done some tests.

850kg car's weight (with driver), I went for 10% drivetrain loses and 0 ...
by StefSonic7EV
Sun Oct 25, 2020 3:28 pm
Forum: Tesla
Topic: Tesla Parameters Thread
Replies: 60
Views: 26362

Re: Tesla Parameters Thread

Hi Manu,

Nice post, lots of details. What is your car's weight, probably around 1,5 tonnes, right?

I'm asking because I was trying to figure out parameters for a good few months now, first on the old engine and v4 Board, last two weeks I went for a new SDU (burned inverter in the first one) and v6 ...