Brake Locking Issue

[2000xp8]

I suggested the right mc's one post ago. For the pp, buy the ford racing plug and just remove the insides. You will also need to do the 3 to 2 port conversion of it's not done already.

 

[stang&2Birds]

I have a set of 99 rear disc brakes I want to use. I now intend to buy the north race car brackets. So what MC do I use and as important at this moment, how do I gut the proportioning valve? Do I just drill it out? I want to do that first and then add the rear disc brakes immediately after.
Thanks for all the help!

4) Do you have an aftermarket proportional valve? If so, what type, and do you know the setting.

5) Do you know if they did the correct thing and "gutted" the prop valve?

BTW, a good reference for upgrading to sn95 brakes is from FRPP:
(it's for the M2300K kit - Cobra brakes, but there's a lot in common)
http://www.fordracingparts.com/download/instructionsheets/FordInstShtM-2300-K.pdf

4) Do you have an aftermarket proportional valve? If so, what type, and do you know the setting.

5) Do you know if they did the correct thing and "gutted" the prop valve?

BTW, a good reference for upgrading to sn95 brakes is from FRPP:
(it's for the M2300K kit - Cobra brakes, but there's a lot in common)
http://www.fordracingparts.com/download/instructionsheets/FordInstShtM-2300-K.pdf

Just use the North-whatever brackets and keep the same length Fox axles - 5 lug.
If you want ABS, you need the sn95 rear axles (and the ABS ring on the axles). But, that pushes the rear tires out and makes it tight in the rear.

http://www.fordracingparts.com/download/instructionsheets/FordInstShtM-2300-K.pdf
http://www.fordracingparts.com/download/instructionsheets/FordInstShtM-2300-K.pdf


Yea, I'm kinda **********. Like I said, FRPP had PURE SH*T for "directions" when I did my M2300K upgrade.
Now, the M2300K instructions are great guide for ANY sn95 upgrade!
Go by what FORD says! Yes, it is that simple. Do not go by what people say in the forums, or the cr*p you read on the interweb.


Nice pics and instructions in the FRPP M2300 install manual on the prop valve modification.
Did I mention that
http://www.fordracingparts.com/download/instructionsheets/FordInstShtM-2300-K.pdf
has instructions, pictures, part numbers, was written BY FORD, etc.


But, if you really really really MUST read it in a post and on the "you get what you pay for" interweb:

Also,
http://www.corral.net/tech/handling/t3.html

http://www.corral.net/tech/handling/m2300kinst2.html
View attachment 146921
20 Minutes
The included stock proportioning valve needs to be modified before installation. This is the gold piece with 5 brake line fittings, two on the top and three on the bottom. Under normal conditions it controls the amount of pressure going to the rear brakes; however, SVO has included a Wildwood proportioning valve to do this function. As a result it is necessary to disable the included proportioning valve. you cannot use the original proportioning valve, you must use the one in the M-2300-K kit.

1. Remove the end of the proportioning valve that faces the front of the car.
2. Remove the spring and plunger.
3. Install the included plug in place of the original end.
4. Install the new prop valve, you will have to move some brake lines around. Be very careful.
5. Install the new master cylinder and attach all lines to the prop valve.

BTW:
http://www.fordracingparts.com/download/instructionsheets/FordInstShtM-2300-K.pdf
http://www.fordracingparts.com/download/instructionsheets/FordInstShtM-2300-K.pdf


Good Luck!

 

[stang&2Birds]

If you want to see the neato pictures, read the installation guide!


M-2300-K Cobra Disc Brake Conversion Kit
Page 27 of 34

STEP 1: Remove existing master cylinder, brake booster and proportioning valve.

STEP 2: Modify new fixed proportioning valve (Item 24) by removing the plug, spring, seat and plunger from the front of the old valve.

STEP 3: Remove O-ring from old valve plug and install the O-ring on the new valve plug (without hole--Item 26). Install the new plug (Item 26) in the new proportioning valve.

! ! ! Caution: It is absolutely mandatory to use the new plug without the hole. Use of the original plug in a modified proportioning valve can result in a brake system failure. ! ! !
Note: This modification defeats the proportioning valve function. The new adjustable proportioning valve will be installed downstream to provide the proportioning function.


M-2300-K Cobra Disc Brake Conversion Kit
Page 28 of 34

STEP 4: Install the new master cylinder (Item 21) - torque to 16-21 ft./lbs, brake booster (Item 20) - torque to 16-21 ft./lbs. and new proportioning valve (Item 24) - torque 8-9 ft./lbs. It may be necessary to “relieve” the inner fender panel for booster clearance on models prior to 1991.

STEP 5: Reconnect the wiring harness plug to the master cylinder float switch.

STEP 6: Connect the new master cylinder to the modified proportioning valve with existing vehicle “pigtails”. Old New


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M-2300-K Cobra Disc Brake Conversion Kit
Page 32 of 34

STEP 13: Attach the remaining vehicle brake lines to the bottom ports of the new proportioning valve. You will need to attach the line to the lower rear port with a Weatherhead 7828 fitting (Item 48) Torque to 124-212 in./lbs.

STEP 14: Install the two (2) Weatherhead 202X2 fittings (Item 50) in the adjustable proportioning valve (Item 25) Torque to 124-212 in./lbs.


M-2300-K Cobra Disc Brake Conversion Kit
Page 33 of 34

STEP 15: Install the variable proportioning valve assembly in place of the brake line union at the firewall on the passenger side. Screw the knob on the adjustable proportioning valve all the way in (clockwise) at this time.

STEP 16: Recheck all fittings to ensure all connections are tight.

STEP 17: Fill the master cylinder with new DOT 3 or DOT 4 (recommended) brake fluid and keep it full during the brake bleeding process.


STEP 18: Bleed the brake system manually or with a power bleeder (recommended) in the following
sequence:
-Right rear
-Left rear
-Right front
-Left front.

Continue bleeding the brake system in this sequence until all air is removed from the system and a firm brake pedal is obtained.

! ! ! Caution: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes with running water for 15 minutes. Get medical attention if irritation persists. If taken internally, drink water and induce vomiting. Get medical attention immediately. ! ! !

 

[stang&2Birds]

I have a set of 99 rear disc brakes I want to use. I now intend to buy the north race car brackets. So what MC do I use and as important at this moment, how do I gut the proportioning valve? Do I just drill it out? I want to do that first and then add the rear disc brakes immediately after.
Thanks for all the help!

Huh?

Again, do you want to do it half-***ed? Or do it right?
You can not "just add rear disks" to a MC/prop-valve/comb-valve setup for disk/drum.
And, you can not "just put on a MC/prop-valve/comb-valve" that's designed for a disk/disk system on a disk/drum system.


The factory "prop valve" is more than just a prop valve.
And, the MC must be designed and correct for the type of setup - either disk/drum or disk/disk. And, you also want the MC bore and stroke CC to be matched to the setup (there is a pretty wide range actually).

If you want to drive with disk/drum, you:
o) Keep the Fox prop/comb-valve and do a 3-2 port adapter (or run an 85/86 prop/comb-valve).
o) Disable the "prop functionality in the prop-comb" valve, and add an adj prop valve.
o) And use a MC designed for a disk/drum system.


If you want to drive with disk/disk, you:
o) JUNK the Fox prop/comb-valve
o) Put in an sn95 prop-comb valve. Disable the "prop functionality in the prop-comb" valve, and add an adj prop valve.
o) An use a MC designed for a disk/disk system.


Again, for a disk/disk setup, do what Ford says (and does). Not what some money-grabbing clueless company says (like most of them are). Or, what you read on the interweb.


Good Luck!

 

[VIRstang]

Thanks! That is the information I need! I will run with this.