Master Cylinder went out.... Time to upgrade!!

[TenorPlayinGuy]

Well, sadly and scary at that, my master cylinder went out today after going down a hill.... yeah...

needless to say I need to replace the old school 87 3port master cylinder with something that can better handle my 4wheel discs. I know I need to go with a larger piston, so at least a 94 gt cylinder for me. But I wanted to know just how much more stiffer I can make the pedal with the cobra version. I have a MM 3-2 port converter so I don't have an issue with this swap. I also wanted to update the brake booster as well. I don't want a huge cobra one. Whats the largest I can fit without cutting, whacking on the strut tower.


Before it is asked, I have cobra brakes, 13" dual pistons up front (38mm) and the 11.65" singles in the back. Proportioning valve is installed as well. I have no leaks anywhere on the car, so I have to say it's the master cylinder.


What do you guys propose?

 

[Mustang5L5]

Well, ideal mc is the 94-95 cobra mc with the 15/16" bore.

If you want stiffer, the 93 cobra 1" bore will give you a stiffer feel

If you want even stiffer, the 94-95 gt/v6 mc is 1 1/16 and will make the pedal even more stiff.

If you are running the fox booster, you might find the 94-95 cobra mc plenty stiff. It's about 23mm in dia vs the 21 mm of your stock fox mc. The bigger the bore without changing calipers, the stiffer the pedal

 

[TenorPlayinGuy]

So ideally yes, I would use the Cobra parts, however with the inability to find the parts locally, and with no time to wait, I will be going with the sn-95 pieces. I don't mind a harder pedal, as I was later on going to go with the Manual brake setup from MM. So I feel the larger bore will be a better overall investment now.