So I have a stuffed ADM MA61 brake booster and a good JDM MA61 brake booster.

They are the same diameter, and therefore the same surface area and therefore assistance (P=F*A)

However, the ADM is ~130mm thick.

The JDM ~100mm.

What does this mean for braking abililty? Is the ADM one twin diaphragm?

Are they interchangeable?

Running 326mm/308mm rotors with Z32 4 pots front and GTR33 pots rear.

Was good with standard master and booster setup.

Wouldn’t complain if it was a tad harder though…

So what does booster thickness mean??

Thanks all.