The engine was stiff enough, the installation between transmission and engine was not.dren wrote: ↑Wed Apr 07, 2021 6:44 pmI'd wager their rear issue was aero related but I don't know. I find it hard to believe the PU was not stiff enough.godlameroso wrote: ↑Wed Apr 07, 2021 5:41 pmThe new engine and transmission has helped tremendously in rear stability. Last year they had to make compromises on the suspension settings, making the rear end more stiff, because there was a little flex in the back. This year they can make the suspension more compliant because the engine and transmission are stiffer, lighter, more compact, and a lower center of gravity. This greatly aids rear stability.
By increasing the space for air to flow inside the bodywork, the higher the pressure inside the bodywork becomes. We saw a glimpse of this when Perez's engine cover blew off the car. Once he pulled out of the slipstream the pressure inside the car increased dramatically. It is this pressure difference that helps airflow stay attached to the engine cover.
Not quite sure what you're getting at in the second paragraph. Increasing internal volume for air flow should drop the pressure. I have no clue how a pressure difference inside the body work helps flow stay attached to the engine cover.
Increasing internal volume increases the pressure because pressure is a function of flow times velocity. The higher the mass flow and the lower the velocity the higher the pressure. This is how the turbo compressor creates boost pressure. The air gets sucked in through the blades at high speed, then the snail slows it down, raising it's static pressure.
If the surface on top of the body has airflow going faster than through it, then that airflow has lower pressure. The ambient air pressure around that moving low pressure air presses down against it, since it's slower and has higher static pressure. That's how the Coanda effect works.
If you could create a cube of perfect vacuum 1 cubic inch in volume, you would have 1 bar of air pressing down on each side of the cube. Your brake caliper piston retracts because of the closed hydraulic system resists a vacuum created when you press and release the brake pedal. The fullness of air outside affects the relative lack of air inside.