Brakes don't Bite Options

[bkrantz]

As part of my rebuild I completely replaced the brake system:
calipers and rear pressure valve rebuilt by PMB
new ATE 19mm master cylinder
new hard and flex lines
new disks and Porterfield R4-S pads

I went through many (many!) episodes of bleeding, with different methods. The pedal feels very firm from the first push, and does not pump up. Rear clearance is set at .004". I went through the PMB bedding process, and have driven around a bit.

But the braking force seems weak. When I get on the brake pedal, I do not feel any "bite". Another 914 friend drove the car and also agrees.

Any suggestions?

[barnfind9141972]

I did the same thing and also couldn’t get much brake pressure. I noticed while bleeding, there was air in the rear proportioning valve and still some in the calipers. I cracked those hard lines, let them pour out, tapped all four calipers with a rubber mallet to get more air bubbles out and re bled again and was able to get pressure. Once driving I did the aggressive braking procedure, after once or twice I finally got them to lock up and about after a week or so of regular driving did another bleed just in case. Was definitely a head banging process but I figure if the car moves it needs brakes so well worth it