MonsterBilly

I have a cobra discuss conversion and although the stops well, it takes a lot of pedal pressure. I am thinking about adding a booster to it to help. I am running a cobra master cylinder as well. The problem is, I have a hydraulic clutch.
I don't know if I have room for a booster. Does anyone out there run power brakes with a hydro clutch set up

67mustang302

What are the caliper piston and m/c piston sizes? What are the disc conversion parts off of?

barnett468

hello;

you can run better brake pads if yours are not high perf. you can also install a master with a smaller piston diameter but this will slightly increase the distance your pedal must travel before it stops.
.

MonsterBilly

I'm not sure of the caliper piston size, they are 2004 mustang cobra calipers. The master cylinder is a 1in. Bore.

I do have a set of upgraded Po ads I am going to try and install.

barnett468

hello;

if you can stand a bit more pedal travel you can run a 15/16 or even a 7/8 master.

what pads are you using?

what are the new pads?

what is your driving style?
.

MonsterBilly

Wouldn't a smaller bore cylinder require even more pedal pressure.

67mustang302

No, a smaller bore will produce more pressure but move less fluid, so you have to push the pedal farther.

Part of your problem may be that the brakes were designed to run on a boosted system. If the caliper piston bores are small, then you'll need more pressure to make them work. Depending on the brake system design, you may need 1,000-2,000psi. Mechanical systems typically run in the region of 1,000-1,200psi under operation. If you have a system that needs upwards of 1,500-2,000psi to work, you'll probably need a booster.

If you have plenty of room for additional pedal travel, you could try dropping down to a 7/8" bore m/c.