Newly Scaled Object Issue

ok. I made an awesome functioning car with pretty good physics. The world gravity is set up to -25. However, I just discovered that I need to double the size of my car by scaling it up by 2. When I run the game now, the car seems to respond slower as if the new change in size has affected the gravity on it. However when I double the gravity in the scene, it doesnt resolve my issue. Does anyone know of a good way to make my car seem like how it was when it was smaller without reverting back to the original size or changing the world gravity?

Try doubling force applied, acceleration or max velocity.

i did all the obviouse techniques then added a negative global velocity to the hulls z axis