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?

[JamesM]

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?

Can you lock the brakes up if you stand on them?

If yes then they are working.


Pad type can change the feel of the initial "bite" however I find that the rebuilt calipers feel a little soft at first but will become more responsive over time as the new rubber in them work hardens.

I find going REALLY aggressive with the bedding procedure helps with this as well. You really want to cook those things.

[Superhawk996]

Can you lock the brakes up if you stand on them?

(IMG:style_emoticons/default/agree.gif)

This question needs to be answered. If the front brakes can’t be locked there is something wrong.