A One Inch Diameter Brake Master Cylinder for the S30 Z Cars

[Miles]

13 hours ago, sixstarlegacy said:

Any updates on 2024?

Is the Wilwood still leaking for most?

Anyone also added Brake Proportioning Valve?

Pictures please.

 

You don't need a proportioning valve.

 

 

[Matt90Gt]

has anyone tried to use a 1.00" bore master cylinder from a 96-98 Mustang v6?  Looks like you would remove the studs.  If that bolt pattern is compatible, it could be an easy swap

[Miles]

On 6/25/2025 at 8:00 AM, Matt90Gt said:

has anyone tried to use a 1.00" bore master cylinder from a 96-98 Mustang v6?  Looks like you would remove the studs.  If that bolt pattern is compatible, it could be an easy swap

 

Just use a 1979 280xz MC as it bolts on and it has the correct metric threads in the output ports.  The downside of going to a larger bore MC is that the pedal will be stiffer and requires more foot pressure to stop. This can be corrected on the 240z  that uses a 7in. dia. booster by going to a larger 81/2 in. dia. 280z booster.  If you do this booster swap you will need to swap the 240z booster push rod into the 280z booster so the booster push rod connects to the brake pedal like stock. 

 

My brake set up: Brakes are excellent.

·       Front:1979 Toyota 4x4 pickup S12+8 calipers with 240z stock solid rotors.

·       Rear: 1989 240SX calipers with 1984 non-turbo 300ZX solid rotors. Modern Motor Sports adapter bracket (NLA)

·       Master Cylinder: 1979 280ZX 15/16. sourced from Arizona Z Cars

·       Booster: 1977 280Z.  Barely fits between throttle bracket and clutch MC (Wilwood Compact).  Brake feel is excellent.

·       Brake Pads: Carbotech AX6. Excellent cold bite and does not fade when hot. Perfect daily driver pad.

 

 

 

Edited Thursday at 04:10 PM by Miles