So I got my Roadster back today and Menlo Park was able to confirm that the PEM does indeed recover faster than the 1.5 PEM from higher temps. I pushed the loaner really hard across Woodside road this morning which is all but straight, lots of hard twisty turns and I did the trip early in the morning where there wasn't really any traffic. Again the car performed well, except for the brakes as I mentioned. I wouldn't trust those damn Brembo's to stop me for anything... there's nothing but fade and failure there. So I really couldn't push as hard into the turns as my 1.5 since I have the CarboTechs that bite with confidence. However I pushed the car hard coming out of each turn floating and pushing the front wheels out of the turn... you can feel them just lighten up and not respond until you let off the accelerator which is all controllable. Anyways... to get to the point the PEM would bump up a block but rapidly recover as soon as I got off the pedal. So that was super nice. In comparison I watched my PEM temps on my 1.5... just going over Highway 17 back to Santa Cruz which isn't as bad as Woodside road... and the PEM temps definitely hung steady at the last blue block and stayed there for a while (it hasn't been all that hot here but the temps have been consistent across the time of the 2.0/1.5 switch). I'm also noticing my battery temps staying higher too on the 1.5... so I'm thinking from that noisy coolant pump in the 2.0 that its circulating the coolant faster as I stated before.
A couple things I learned:
The 2.x PEM fan is always running whereas the 1.5 PEM is on a thermostat and kicks on when needed. I took notice charging the 2.0... its fan was always running whereas my 1.5 would shutdown. So running all the time charging was kinda annoying... my 1.5 is way quieter bigtime over the 2.0 in all aspects of charging and sitting. However when driving there's something with the 2.x design that is evident that it really works. I think the thermostat is still a good design, no need to keep running it when you don't, but I'd like to have the cooler temps that's for sure which may be linked with the updated fan design. I think the 1.5 can't upgrade from what I heard such as the PEM fans but it can have the dual blower mod.
The 2.x has a dual blower that also helps force more air to the PEM compared to the 1.5 that only has one. These blowers blow air to the motor's heat sink as well as to the PEM, there are two ducts that are routed... one to the PEM and one to the motor that are shared with this blower.
There are two fans on the PEM itself on the 2.x, but I think I got this right that there are also two on the 1.5. But somehow the 2.x's are better. I have to look at some breakdowns of the PEM to confirm and understand this.
Happy I got my Roadster back. Miss the 2.0's seats, the part that holds your body in place. I also can feel and miss the extra padding on the butt portion but didn't like the height it bumped me up by. Would love to have my 1.5 seats with the 2.0 side grippies, the 1.5 lumbar pump, and a padding but but also to drop the seat down so you don't get any height difference. Going through the turns in the 1.5 I definitely could feel my torso shift side to side which felt a little sloppy. It also definitely gives more of a sports car feel with those seats compared to the 1.5's.
I also noticed that the rear end handling was somewhat tighter and better on the 2.0. The difference there was the rear swaybar, the 2.0 had an adjustable thicker swaybar due to the dual blower fan it was built with. However there's two adjustable swaybars I saw on two different Roadsters today. One that came out further towards the rear for the dual blower (on my 2.0 non-sport loaner) and one that did not which was weird since it was a 2.5 (non-sport) Roadster. Both were adjustable. I have to email Tesla to really understand that one, we both (MP Tesla and I) were puzzled by it.
Also happy to have my 1.5 shift select back. I really don't like the buttons or the brightness of those things at night. Backed into my driveway without looking down at the gear selection which is nice and way smoother of a transition.
Would be sweet to build a Roadster that was the best of the best, a combination of a 1.5 with the added advancements of the 2.x's and definitely make it a Sport Please