This only works for increasing weight, so you would have to use something lightweight like a Miata. The problem with this is that a Miata won't be able to take 600 whp. If you throw too much power into a car you'll just warp the frame. To some extent you can reinforce the frame, but there is still a limit.

Regardless, adding weights to the car is going to destroy the car's center of gravity which will really mess up handling. You can test this with any car, put 100 lbs in your trunk and drive it around. It's very noticeable.

The miata is one of the lightest cars in the market. You cant add bricks to a Tesla and make it lighter.

And you can't change wheel base, weight distribution, ect, nilly willy.

He thinks "Miata = 50/50 balance" as if wheel size, suspension geometry, overall weight, are irrelevant.

You’ve never driven any of these cars, have you?