E30 big brake kit master cylinder upgrade

[N1overspeed]

I am new here. Track car is 1990 E30 with big brake kit. Thinking about a master cylinder upgrade because bleeding does not stabilize the pedal.... any advise on which master cylinder to install?

[matthugie]

I think I used a master cylinder from an E32 7 series, but that was also in conjunction with an IX booster since the car was swapped. I had a UUC BBK and had no complaints about the pedal.

[kingston]

I put in an E30 M3 MC on my old E30 with a front BBK from Massive using Wilwood Superlights. Worked great!