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My first post but have been watching these videos for a long time.
I’m not an Engineer but here are my thoughts. Will these braided lines help stop the car better, absolutely not and here’s why. All things being equal, hydraulic pressure in a mechanical system is dependent on the driving force behind it and the components within the system. If the braking system has parts that allow for expansion this equates to a delay in order to build the adequate pressure needed to apply force on the braking material, in this case pads contacting the rotors. The delay is a perception that the braking system is not adequately doing it’s job when in reality the pressure is not where it would be less the expansion. A lot can contribute to this, one being old rubber brake lines but this doesn’t mean the system isn’t capable of stopping in the same distance given appropriate pressure is achieved.
It really comes down to this. Brakes essentially do not stop the vehicle, tires do. If the mechanical advantage of the braking system is lower than the coefficient of friction of the tires your stopping distance will be longer. If you have tires that provide a higher level of grip than the brake system, well I guess you see where I’m going. I’m not saying there aren’t other factors that play into this but this is the simple math.
Steel braided lines are great for what they really are intended to do which is provide a better feel. They can reduce the pedal travel and provide quicker application of the brakes but it will NOT reduce the stopping distance. The ability to modulate is their higher purpose during hard driving, for example on the track. Consistent and repeatable brake pedal feel during application is where they really shine.
If you want to reduce the braking distance it comes down to pad material and tire compound.
My $.02