davidc18
Active Member
Just wondering...have you analyzed the power distribution on a stock P85DL in terms of power going to the rear vs the front motors? Would it be beneficial (better performance) to tweak those to give more power to the rear wheels or has Tesla already maximized this balance in the stock?
Lloyd
Well-Known Member
jbcarioca
Well-Known Member
- Feb 3, 2015
- 5,077
- 22,989
Every time I read about a wk057 project I am in awe. I am rarely in awe. he does it every time.
When I am reading his stuff I recognize that my self-perceived well-informed being is actually an ignorant heathen.
and he lives in North Carolina, parts of which are among my favorite places.
When I am reading his stuff I recognize that my self-perceived well-informed being is actually an ignorant heathen.
and he lives in North Carolina, parts of which are among my favorite places.
I was so proud that I managed to change the tires on my Fiat without any major hiccups today ... unlike the 4-hour slapstick comedy of mishaps and errors that my last oil-and-filter change was ...
On a side note, you just know that somewhere, in some office on on some plane, Elon Musk is reading this thread, unable to decide whether to smile or shake his head.
qwk
P130DL
- Dec 19, 2008
- 3,024
- 766
The sad part is that Elon could replace most of the Tesla engineering department with wk, and be much further ahead than they are now. Very impressive skills.
mspisars
Active Member
It's been asserted that the initial P85 and S85 motors were the same, but the inverters were different. Not sure I ever saw proof of that via dissection, but at least one person stated they had different part #'s...
thegruf
Active Member
Holy moly...
is that with rollout?
sorry couldn't resist
I would just love to understand these cars in the depth you do, would add so much to the fun of owning them.
Fantastic job and thanks for sharing it with us.
is that with rollout?
sorry couldn't resist
I would just love to understand these cars in the depth you do, would add so much to the fun of owning them.
Fantastic job and thanks for sharing it with us.
Yeah, it is... wanted something comparable to the original P85D number (3.2s w/rollout). Seems everyone quotes w/rollout these days.
Here is a CAN log graph of a 0-99 run:
Had pretty good traction here after the initial kick. (Yes, some of the motor and pack data is time-offset from the speed data for some reason... all of my CAN captures are like that) Was a hair uphill. 0-60 this run was 3.48s w/rollout, 3.67 straight 0-60.
Seems the hard torque limit was the acceleration limiting factor up until about 50 MPH. Drag strip 1/8th mile time calculated at 7.61s @ 94.5 MPH.... which is almost a full half-second faster in the 1/8th vs previous runs with the car a while back and +7 MPH trap. (Edit: Had an error in the initial 1/8th figure, typo in calculation script made the virtual track 36 feet shorter
)Awesome.
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qwk
P130DL
- Dec 19, 2008
- 3,024
- 766
After you own your Tesla for four years, and go through a ton of firmware downgrades(yes the FW that my car was delivered with was far superior than the current version), then you might change your mind. Firmware doesnt exactly get worse when your engineering team is great....
That would require more current. Power is a factor of torque and RPM. Once the RPM gets higher it would take more current to hold the same torque... and thus more power. The 650 Nm torque limit appears to be based on a mechanical limit. The current limit is a physical limitation of the inverter's design. There probably isn't much more that can be squeezed out of this drive unit without extensive modifications.
RAM_Eh
Member
Lets bump that torque limit. It'd be fun to try to hunt down the limiter tables, it's what I do all day in diesel ECU's.
Maybe somewhere near 0x0116 there's a broadcast of max allowed torque?
Nick
Maybe somewhere near 0x0116 there's a broadcast of max allowed torque?
Nick
Attachments
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650nm Torque limit.jpg
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