Master Cylinder failed. What upgrade options do I have?

[Cman88]

Are there any larger master cylinders that will bolt right in? I figured might as well upgrade now since the stock one has failed.

 

[billison]

i think that the master out of a 94 up 5.0 is bigger

 

[Cman88]

i think that the master out of a 94 up 5.0 is bigger

Does it bolt up?

 

[billison]

as far as i know, that's what they tell you to get for the turbo coupe rear end swap, so that's my guess, you can do some research on it and probly do a total upgrade, maybe do the 5 lug swap, maybe?

 

[Cman88]

as far as i know, that's what they tell you to get for the turbo coupe rear end swap, so that's my guess, you can do some research on it and probly do a total upgrade, maybe do the 5 lug swap, maybe?

From the pictures I saw, it wouldn't work. The stock MC has three lines going to it, the 94+ MC had only two lines. I tried finding a Cobra MC, but no one had one. Got a stock reman for $31... That will work just fine for now. No money right now to change to five lug since I would need new rims..

 

[jrichker]

Stock brakes? Then keep the stock M/C. Using a different one could change the pedal feel in the wrong direction.

 

[Cman88]

Stock brakes? Then keep the stock M/C. Using a different one could change the pedal feel in the wrong direction.

It will move more fluid and make the pedal more responsive. Its not exactly a negative thing. Stock is 15/16, Cobra = 1"... it would help some, but not enough that I want to go through the trouble of getting one.

 

[TrophyHead]

I would look at upgrading the brake booster. 94-95 booster will go in but it is a PITA really. The worst job I've ever done to my Mustang.

I heard it will help alot with the stock Fox brakes. You'll have to convert your MC to a 2-port system if you go with a SN95 MC. Maximum Motorsports can hook you with all the right pieces.

 

[jrichker]

People don't understand two things: electricty and fluid dynamics.The master cylinder size is linked to the size of the wheel cylinders. It works like a lever. Put a cheater bar on a wrench and you get more force, but you have to move the end of the cheater bar a greater distance to make the bolt turn.

Increase the bore on the M/C and the fluid volume increases but the pressure decreases. In order to get the ratio between M/C & wheel cylinders back to the stock value, the wheel cylinders must increase the bore size.

The best balance using Ford parts for 5.0 Mustangs is 73 MM calipers and a 1' or 1 1/16" M/C.

This is the short version of how it works. If any one is interested or would care to dispute the logic, I can post the numbers.