Brake issue help!!

[DonohurJav]

I can point you in the right direction, but there are a few great brake experts on here that can hopefully chime in get you exactly where u need to be.

I can tell you that your 1.125 MC is NOT FOR A manual brake application. Larger masters are for higher pedal assist as they push more fluid but have a harder pedal thus requiring more help(assist/boost etc.).

With your current meager boost,or assist , you would be better with a 1", or 15/16 MC piston. Smaller size is easier to push with more pressure but less volume of fluid, but needs less assist.

Hydroboost generates the most pedal assist, followed by the electric master cylinders, followed by the vacuum boosters. Depending on engine vacuum of course.

Long story short, if you keep your large 1,125 MC, you need more boost, or pedal assist if you will. If you keep your vacuum booster, you will need a smaller MC. Likely 15/16-1".

Caliper piston volume plays a large role in what size master you need, then generally you match the booster needed to that.

There are several experts on here that can crunch the exact numbers for you.

Hope this helps some.