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Old 08-03-2014, 01:59 PM   #1
MonsterBilly
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Default brake booster

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
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Old 08-03-2014, 09:19 PM   #2
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What are the caliper piston and m/c piston sizes? What are the disc conversion parts off of?
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Old 08-03-2014, 10:13 PM   #3
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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.
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Old 08-03-2014, 10:16 PM   #4
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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.
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Old 08-03-2014, 10:54 PM   #5
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Quote:
Originally Posted by MonsterBilly View Post
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.
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?
.

Last edited by barnett468; 08-03-2014 at 10:59 PM.
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Old 08-04-2014, 08:21 AM   #6
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Wouldn't a smaller bore cylinder require even more pedal pressure.
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Old 08-04-2014, 01:14 PM   #7
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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.
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Old 08-04-2014, 01:14 PM
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