I have tracked my S P90DL a few times, and just like you said you only really get a few laps in before everything starts to overheat. This is the perfect video for people like me that would like to enjoy the car at the track. I would love to see a follow-up video of your results before and after all the modifications. Keep up the good work.
Good stuff ! I wanted to understand the cooling system, and you have expanded my knowledge beyond 'stock performance'. I see many areas of potential failures on the heat dissipation side of the equation. Commonality in one part of the system could disable the independence of the entire system. Independent fluid based oil coolers driven by the motor itself via flat plate heat exchangers is the most efficient way I can think of to do that. Fluid to air independence driven by unit powered fans/pumps, for fluid to air exchange - would be Awesome Technology ! Each having their own electrical system and batteries would be even better ! With wings & props these things could fly.
Can you limit the battery temps so they don’t cool off too much. Some heat is good in the battery. It looks like that giant radiator could cool the battery off too much.
There's a few different possibilities. You could use a 3-way valve to divert coolant through the radiator only when needed. You can also avoid pre-cooling the battery. Waste heat from the motors can warm the pack still, even in freezing temperatures.
Awesome I just took my 3 apart after having heat issues on the track, was looking at something like that for the frunk, can you tell me where you got the connectors to plumb in the radiators. How hard was the rear oil cooler to install.
Nice information and setup, did you consider some hood openings/scoops like intercooled cars tend to use to help force air thru your frunk radiator? At speed that should be a lot of cooling.
Thanks for the feedback! It would definitely help if additional cooling was needed, but after moving to a more permanent radiator solution and lots of testing the battery cell temperatures aren't the limiting factor, and this non-vented setup allows enough cooling without over-cooling.
I did try something similar, basically spraying the radiator - it's overkill though. The additional radiator will manage pack temps fine. The car then pulls power as a result of managing the discharge rates, not due to the cell temperature itself.
@TrackMyEV is that radiator hookup to to both motors? I just got an oil cooler kit for the rear motor for that exact reason. I'm thinking of running an additional radiator under the frunk as well to regulate it as mine is just the SR RWD. So I figured the front space where the front motor is could probably hold an additional radiator and just run the line to the rear motor. Not sure how to do that that.
It's a combination of my own designs in conjunction with Mountain Pass Performance. All installations are done myself, I have a business doing this. Check out my website for more info.
Fascinating! Do you know if Tesla's automatic transmission fluid is specific for the drive units or is it something where you could use any automatic transmission fluid since not all automatic transmission fluids are the same?
