Brakes 5-Lug Converted Brakes / Parts - ID Help!

Sabretooth

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Feb 27, 2019
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I bought a 92 mustang lx about a week ago still learning about it i know it has a 5 lug swap and disc breaks all the way around. now here is my issue. when the car is off the brake peddle is firm an does move much. when its on and i try and use the breaks it goes right to the floor. does anyone have an idea what is is also if i were to replace the brake rotors and pads what would i look for 94-94 pads and rotors?
 
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Noobz347

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I would normally move a thread like this to the Talk Section. This is becoming a more frequent question as these things change hands.

I bet we have the folks necessary to turn this thread into a Technical Index thread, eh @Mustang5L5 ?

I'm going to tidy up the title just a hair.
 

Sabretooth

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Feb 27, 2019
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I would normally move a thread like this to the Talk Section. This is becoming a more frequent question as these things change hands.

I bet we have the folks necessary to turn this thread into a Technical Index thread, eh @Mustang5L5 ?

I'm going to tidy up the title just a hair.
Thanks man new here any help is always appreciated i maybe young but im computer illiterate
 

Mustang5L5

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Well, engine off without vacuum the pedal should be hard as a rock. That's typical.

Soft pedal engine on could be any number of things. Step 1 is a pic of front and rear brakes plus the MC/booster showing the lines coming out
 

Sabretooth

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Well, engine off without vacuum the pedal should be hard as a rock. That's typical.

Soft pedal engine on could be any number of things. Step 1 is a pic of front and rear brakes plus the MC/booster showing the lines coming out
 

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Mustang5L5

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94-98 GT/v6 brakes front and rear. Stock booster.

The MC has been changed asi can see the 3-2 port conversion, but hard to see what MC it is. Should be a 94-95 GT/V6 master
 

Sabretooth

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94-98 GT/v6 brakes front and rear. Stock booster.

The MC has been changed asi can see the 3-2 port conversion, but hard to see what MC it is. Should be a 94-95 GT/V6 master
Thank you so much. gotta get this done almost racing season. also what is the 3-2 port conversion havent heard that before
 

Mustang5L5

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Stock master cylinder has three outlet ports on it to the various brakes on the car. The 4-wheel disk MCs have two outlet ports. So a 3-2 conversion kit tees the two front brakes together to connect to one of the outlet ports on the 2 port MC
 

2000xp8

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I'd also check for an adjustable proportioning valve, if someone added it, should be on the passenger side fire wall up top in the brake line.

Look at the stock one too below the MC. There is a Nut/plug on the front (or rear I forgot), if it had a rubber stopper in the middle, it's still original and hasn't been gutted.
If it's solid, likely someone gutted it (which is right)
 

Mustang5L5

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That is the rear Caliper for any 94-04 mustang.


Only difference is the pads and abutment bracket. But the caliper portion with piston is the same for all years and models
 

Sabretooth

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That is the rear Caliper for any 94-04 mustang.


Only difference is the pads and abutment bracket. But the caliper portion with piston is the same for all years and models
great thank you for answering all of my stupid question if i could buy you a beer i would lol do i have to use a ford caliper or can i get anyone from the part store?
 

Sabretooth

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Update I installed new master and caliper break is not on the floor but dang near it do i need to bleed them again or could something else be the culprit
 

Mustang5L5

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And with engine off, your pedal is hard as a rock?

WHat MC did you buy?

Are the calipers installed on the correct side? Believe it or not this is common and when they are flipped, it becomes impossible to purge the air out of the top of the caliper
 

Sabretooth

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And with engine off, your pedal is hard as a rock?

WHat MC did you buy?

Are the calipers installed on the correct side? Believe it or not this is common and when they are flipped, it becomes impossible to purge the air out of the top of the caliper
Yes bleed it with the engine off slowly started to get harder and once it was on soft and firm at the bottom they are installed correctly bleeder screw is at the top and solid streem of fluid is coming out. Should i take it to my shop and let them use their fancy vacuums to solve the issue?
 
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Mustang5L5

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I'm not a fan of vacuum bleeding. I have one myself and can never seem to get it as good as doing it the old fashioned way. Still it's hard to say what you are doing (or not doing) that could be causing this. Might be a good idea to get a second set of eyes/hands on it.