Soft Brake Pedal!!

[vivalegreg]

does it go to the floor when the car is off?

[scabzzzz]

You probably need to run another vacuum line to the intake below using a t connector. This is pretty common on M50 swapped cars.

[DEV0 E30]

Do you have a check valve from your intake manifold to your booster? I didn't realize I put mine on backwards last time I had my engine out. Brake pedal would sit correctly but would barely slow the car.

[mops]

do they sell brake master ( and clutch for that matter) cylinder rebuild kits ?

[static]

strange i also have problem with soft brakes after the conversion even with all SS lines (i am using ix booster and new m5 master)

[Massive Lee]

Bleeding the brakes is not easy, especially when the MC was changed. I highly recommend using a pressure bleeder ($50) while you pump the brakes relentlessly. Be prepared to waste at least one litre of fluid. Use some cheap one initially. Then, when you are satisfied with the feel, swap to better fluid.

[Brian D]

Hi Richard, what were your reasons for running the bigger master? Did you change the master at the same time as the engine swap?

[mazur]

Ever since I have done my swap I have had a soft brake pedal. Since then, the brakes have been bled 3 times and it still feels really soft.

If I slam on the brakes it's delayed and just feels like shit. In my E36 it would take little effort for the brakes to grab and as you pushed the pedal down, you almost immediately felt like your hitting a brick...that's the stiffness I'm looking for. My friend's civic has the same good feeling...


I'm using, I believe a master cylinder from a M5 (using IX booster).
I never bench bled the master cylinder, but don't see how it would still have air after all the bleeding I have done. The pedal doesn't drop to the floor so I don't think it'd be a bad MC.


Any suggestions?