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

A5literMan

At least it is lumpy...

5 Year Member

Jul 30, 2011

4,674

2,343

194

Illinois

Mar 30, 2015

#101

• Mar 30, 2015

• #101

Mustang5L5 said:

Which is why I went to Cobra 4-wheel dicks [emoji106]


Sent from my big ass iPhone 6 using Tapatalk

Click to expand...

You might want to re think that last word. lol. Unless that's how you roll. Hehe

 

Reactions: mikestang63

stang89bidges

Advanced Member

Mar 14, 2014

727

144

74

Fort Worth Texas

Mar 30, 2015

#102

• Mar 30, 2015

• #102

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,252

17,937

224

Massachusetts

Mar 30, 2015

#103

• Mar 30, 2015

• #103

Oops. Damn phone Autocorrect

 

Reactions: A5literMan

ID89GT

10 Year Member

May 26, 2008

1,659

18

49

Spokane Valley, WA

Mar 30, 2015

#104

• Mar 30, 2015

• #104

Okay now another question haha. Do I use the svo prop valve or do I keep my factory 85 prop valve and buy the plug for it

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,252

17,937

224

Massachusetts

Mar 30, 2015

#105

• Mar 30, 2015

• #105

Buy the plug and add the adjustable unit on the firewall at the union


Sent from my big ass iPhone 6 using Tapatalk

 

ID89GT

10 Year Member

May 26, 2008

1,659

18

49

Spokane Valley, WA

Mar 30, 2015

#106

• Mar 30, 2015

• #106

Sweet I already ordered the adjustable valve, just need the plug and then should be everything I need for now

 

jwzg

Member

Apr 6, 2004

237

0

16

Prattville, AL

Apr 6, 2015

#107

• Apr 6, 2015

• #107

All these plugs and dicks...you guys seem to have this conversion business down pat.

 

T

Takenbythestorm

New Member

Jun 9, 2015

2

0

1

Jun 9, 2015

#108

• Jun 9, 2015

• #108

Help! I don't think I saw in here what I needed.

I have a 99 3.8 car with a 7.5 rear end.
I purchased a 4 lug 8.8 rear end. We bolted the housing into the car and put my 99 axles in but the caliper is not bolting to the bracket correctly. (I guess this is what I'm seeing referred to as wrong track?)
I'm near broke but I can buy brackets if I need to.
Would prefer not to have to do any cutting/welding.
Someone please give me some options here to make what I have work.
Still have everything from my 7.5 and everything from the 4 lug 8.8.

 

mikestang63

SN Certified Technician

Aug 27, 2012

11,606

8,859

214

In the garage

Jun 9, 2015

#109

• Jun 9, 2015

• #109

Takenbythestorm said:

Help! I don't think I saw in here what I needed.

I have a 99 3.8 car with a 7.5 rear end.
I purchased a 4 lug 8.8 rear end. We bolted the housing into the car and put my 99 axles in but the caliper is not bolting to the bracket correctly. (I guess this is what I'm seeing referred to as wrong track?)
I'm near broke but I can buy brackets if I need to.
Would prefer not to have to do any cutting/welding.
Someone please give me some options here to make what I have work.
Still have everything from my 7.5 and everything from the 4 lug 8.8.

Click to expand...

I suggest you measure the length of the 99 axles vs. the axles from the 7.5 or 8.8 rear end.

 

T

Takenbythestorm

New Member

Jun 9, 2015

2

0

1

Jun 9, 2015

#110

• Jun 9, 2015

• #110

That's the problem. My 99 axles were too long. Someone had told me everything would bolt up and interchange to get me where I need to be. Another source tells me that if I use the fox 8.8 housing, 94-98 axles with my 99 brakes it will work.

 

modulistic

Active Member

Nov 26, 2002

383

30

29

Jun 9, 2015

#111

• Jun 9, 2015

• #111

yeah, the 99+ axles are longer. 94/95 axles will fit, but I think its going to pull your wheels in a half inch or so.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,252

17,937

224

Massachusetts

Jun 9, 2015

#112

• Jun 9, 2015

• #112

Takenbythestorm said:

That's the problem. My 99 axles were too long. Someone had told me everything would bolt up and interchange to get me where I need to be. Another source tells me that if I use the fox 8.8 housing, 94-98 axles with my 99 brakes it will work.

Click to expand...

Correct. The rear brakes of the 99-04 V6 and GT is identical to the 94-98 GT and v6 other than the axles. The 99+ axles are wider.

Just get a set of 94-98 axles.

 

squeak93

15 Year Member

Jun 2, 2005

2,275

367

164

Joplin, Missouri

Jun 9, 2015

#113

• Jun 9, 2015

• #113

Here is a stock 17x8 wheel with 94/95 axles, brakes, brackets on a fox housing.

 

Reactions: jdviper6

N

NightFury

New Member

Aug 2, 2015

24

2

1

Aug 2, 2015

#114

• Aug 2, 2015

• #114

Hi gang. Long time listener, first time caller.

I've been reading and researching brake upgrades for my 93 fox for several months and based on Mike's great info (thanks btw!) this is the setup I went with...

93 Cobra MC
93 Cobra booster
99+ GT/V6 PBR fronts
94+ SN95 rears

It's my understanding that this is basically the same ratio/setup as the 99+ V6 as the 93 Cobra MC and the 99+ V6 MC are both 1" bores.

My problem is, my pedal is too soft and travels too far. The braking power is also underwhelming. I checked the booster to MC pushrod length. I double checked all my fittings/connections, no leaks. I bench bled the MC before install and bled the brakes. All my hoses are steel. Is there anything I'm missing?

I'm going to re-bleed the brakes this weekend just to make sure since the entire system ran dry during the conversion. Could it be something as simple as air in the system or should I consider going to the 1 1/16" bore MCs?

Thanks.

 

Reactions: cturboaddict

Shakerhood

20+ Year Stangneter

Oct 28, 2004

3,356

208

114

Ohio

Aug 2, 2015

#115

• Aug 2, 2015

• #115

How are you setting the prop valve while bleeding?

 

N

NightFury

New Member

Aug 2, 2015

24

2

1

Aug 2, 2015

#116

• Aug 2, 2015

• #116

I had it all the way open so as much fluid could get to the rears as possible.

 

HotFox

15 Year Member

Jan 5, 2009

1,051

656

164

SE Michigan

Aug 2, 2015

#117

• Aug 2, 2015

• #117

Something is a-miss. @NightFury I have the same setup and it is absolutely amazing stopping!

Is the MC new? What about the boosters? If calipers sit around the Pistons may be seized?

 

N

NightFury

New Member

Aug 2, 2015

24

2

1

Aug 2, 2015

#118

• Aug 2, 2015

• #118

HotFox said:

Something is a-miss. @NightFury I have the same setup and it is absolutely amazing stopping!

Is the MC new? What about the boosters? If calipers sit around the Pistons may be seized?

Click to expand...

Booster is a Dorman(?) rebuild. Master cylinder is new. Calipers are used but there was no unusual resistance when I reset the Pistons. Seals and slides are in good shape and lubricated. The only thing I'm not 100% about was whether or not I got all the air out. I only used about 3/4 of a quart. Is that about normal for a full system flush?

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

43,075

21,262

234

Box behind Walmart

Aug 2, 2015

#119

• Aug 2, 2015

• #119

I was going to next ask what your bleeding procedure was but it appears you suspect that already.

Let's ping @Mustang5L5 too.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,252

17,937

224

Massachusetts

Aug 3, 2015

#120

• Aug 3, 2015

• #120

NightFury said:

I had it all the way open so as much fluid could get to the rears as possible.

Click to expand...

Which prop valve do you have?

I believe the wilwood style valve is fully open all the way screwed in.

Does your pedal get rock hard and barely budge with the engine off?


Sent from my big ass iPhone 6 using Tapatalk