I have never seen this type of setup outside of some race setups when the motor is making too little manifold vacuum. Even then, it is mostly in the form a vacuum canister.
The manifold vacuum may not be sufficient to assist in braking.
I do know that the CTT comes in at around 5500 lbs, very heavy. It utlizes a 350mm disc and very large 6 pot calipers. They are as big as basketballs and fill the 20" wheels very well.
I do know that without the pump operating, you need to literally stand on the brakes to make this thing stop. So it is not something that is there to just make the braking feel better.
The plumbing snakes from the manifold to the pump, the brake booster to the pump, and the cabin fresh air make-up to the pump.
I do know that Porsche engineers have made some very piss poor choices in plastics in critical areas. These are very well documented issues yet do not get acknowledged by Porsche.
Why does the engine have a dry sump oiling system? Locking center and rear diffs? Torque multiplying low ranges? Approach and departure angles that of bult offroad machines? Air suspension from 6 inches of ground clearance to about a foot? And on the flip side can do a 0-60 in 5 seconds or a quarter in 13 sec? Out handle most all trucks and SUV's and a good portion of even performance orientated cars?
Why? Because they designed a thingamajig. A race car-rally, mud bogging, hill climbing, track day, soccer day, shopping day, towing the boat day, towing the race car, trans-siberian rally, Paris/Dakar running, whopper jawed holy shit did I just get smoked by that ugly thing, over engineered people mover with different and violent personalities. wheew I got all of that out.:tard:
In the end, Porsche has over-engineered some systems of this ride to the point they are failure. Systems that a more simple approach could well have been taken. In the systems they have used simple tactics, these parts are steadfast and very robust.
I too am still green at this type of auto and am learning with each day as to what makes it tick.
As you can tell, I have zero car friends to talk to about cars.
Sorry if I get windy.