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measure performance
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Use your iPhone to estimate your 0-60 time.
It's easy to analyze you iPhone video on your Mac using QuickTime or Preview. Take a passenger's handheld vid of the speedometer. Then share on Notes or email to yourself and open with preview on your Mac. Here's my video showing how: -
Dragy
There’s a performance device called “dragy” that reportedly is very accurate. It’s $149. I’d certainly like to measure my Tesla’s performance, (uncorked S75D), but once that’s done I don’t really feel a need to have that dragy device sitting years unused in a drawer. So... What I propose...