SN95 To Fox Swap. Brake Problems!

B

brodymac

New Member

Jan 2, 2020

2

0

1

London Ontario Canada

Jan 2, 2020

#1

• Jan 2, 2020

• #1

Hey Guys, new to the site. I recently did a SN95 Spindle swap on my 93 Fox. I upgraded to 94 GT calipers on the front and left the stock rear drums. I’m getting mixed findings about whether I have to upgrade the m/c and booster or not. I have a very soft pedal. They hardly work and I have bled each of them many times... I’m hoping it’s something I can fix without upgrading anything else. I added a pic of the car just because

 

Attachments

• 6C79EB06-1662-4A68-A72C-71C9D63BC61D.webp

  230.5 KB · Views: 182

nickyb

I gotta say i never painted my nuts, Never Ever

15 Year Member

Apr 3, 2009

2,979

1,626

153

nevada

Jan 2, 2020

#2

• Jan 2, 2020

• #2

You should be ok ,unless you let the master cylinder run out of fluid when you changed things? If so you let air in there and now you need to bleed the master.that should do the trick.

 

General karthief

wonder how much it would cost to ship you a pair

5 Year Member

Aug 25, 2016

27,890

10,550

203

polk county florida

Jan 3, 2020

#3

• Jan 3, 2020

• #3

Brakes - The Ultimate 4-lug/5-lug Brake Conversion/upgrade Thread

Starting this thread with the hopes of reducing the number of 5-lug or general brake upgrade threads that have been appearing on the forums since most of the major brake conversion sites have gone down. This thread will be strictly informational, and any off-topic banter or user specific...

www.stangnet.com

This may help you out.
There is also a discussion on mc bore size and why it is important to have the right mc for the calipers and the relation with drum/disc brake setups. I'll see if I can find it. Meanwhile one of the members may chime in with their thoughts.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,231

17,918

224

Massachusetts

Jan 3, 2020

#4

• Jan 3, 2020

• #4

The 66mm calipers on the 94 GT are about 20% larger than the stock 60mm fox units. That means without an MC swap, your pedal stroke is about 20% longer giving you a softer pedal, and longer stroke.

If you change to the 99-04 GT aluminum calipers (use same rotors, need some slight spindle clearancing) , they are about 10% larger than 60mm fox units.

If you change to 99-04 Cobra calipers and 13" rotors, they are 10% smaller giving you a slightly firmer pedal

I would make a decision to change your front setup to one of the above. Without swapping to rear disk, it's the best you will get.

 

General karthief

wonder how much it would cost to ship you a pair

5 Year Member

Aug 25, 2016

27,890

10,550

203

polk county florida

Jan 3, 2020

#5

• Jan 3, 2020

• #5

^^this guy is the one to listen to^^
I believe he authored the thread I linked to.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,231

17,918

224

Massachusetts

Jan 3, 2020

#6

• Jan 3, 2020

• #6

General karthief said:

^^this guy is the one to listen to^^
I believe he authored the thread I linked to.

Click to expand...

I don't know everything though. Jack Hidley has taught me a lot about braking systems...even now. That guy is a real resource.

 

Reactions: Wayne Waldrep and General karthief

General karthief

wonder how much it would cost to ship you a pair

5 Year Member

Aug 25, 2016

27,890

10,550

203

polk county florida

Jan 3, 2020

#7

• Jan 3, 2020

• #7

Mustang5L5 said:

I don't know everything though. Jack Hidley has taught me a lot about braking systems...even now. That guy is a real resource.

Click to expand...

ever so humble.

 

B

brodymac

New Member

Jan 2, 2020

2

0

1

London Ontario Canada

Jan 3, 2020

#8

• Jan 3, 2020

• #8

Thanks for all the reply’s, I’m going to try and bleed the M/C and go from there, if I have to upgrade I will.

 

nickyb

I gotta say i never painted my nuts, Never Ever

15 Year Member

Apr 3, 2009

2,979

1,626

153

nevada

Jan 4, 2020

#9

• Jan 4, 2020

• #9

Keep us posted,good luck.