sandpiper
Active Member
The car does apply power against drive line lash and the tire side wall but this is really not that much torque. The launch itself fully uses the tire side wall and there is absolutely nothing that would give me any hesitation WRT drive line issues.
Race cars and ICE with launch have difficulty when the rotational inertia builds then is abruptly stopped. Spinning the tires on corner exit then gaining traction has snapped many an input shaft or half shaft for me. Street car ICE launches where they spin up the engine then dump that inertia to the wheels is, likewise, hard on components. Tesla does not spin anything up and their traction control is so good that there simply is not enough time in the slip condition to build much drive line momentum. I do not see a problem (and, having said that, I will not likely promptly break my car :0 )
Agree. Many years ago I worked for a company that manufactured transmission shafts. In general, loads are far higher when stomping on the brake than when accelerating. An EV is a different game, of course, because you have so much less inertia in the drive-train.
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This "Squat" has me intrigued. If the brakes on all four wheels were fully engaged while staged, there would be no squat. It makes me wonder if Tesla's Launch Mode only engages the front brakes while the rear motor applies static torque to the rear wheels pressing backwards against the ground. Drag racers with a line-lock engaging only their front brakes while their ICE engine revs up against their torque converter get a similar squat while staged.
This is what I was thinking. If there is a noticeable "squat" then you can't possibly have all 4 brakes engaged.