Finally got around to putting my brake system together on my S5. I custom mounted some 300ZX calipers and rotors on the front, and kept it stock on the rear. Running a 300ZX master cylinder as well.

I've redone all the brake lines, seeing as mine were rusted as shit. Replaced the rear proportioning block.

The problem I am having is the braking power. It's there, stops OK in a sense, but not the way I wanted, or expected it to. I can't even lock the wheels up. There is no air in the lines, no leaks whatsoever, and I'm shit out of ideas.

Anybody have an idea of where my power loss is? My stock system before stopped faster. I wouldn't THINK using the stock brake booster with the 300zx master would be much of a difference, but then again, I 've been wrong before.