Proportioning valve stang rear disc swap 1st gen

[rab]

Thinking of swaping to stock 94-up stang discs to my 83 ranger, the rear end is a 7.5 373 TL from a 90 Ranger.
I have 95-up front spindles and brakes on the truck now and will be upgrading to the sport trac rotors also.if I remember correctly I have a 88 master cylinder and 88 power brake booster on there also (swapped to that cause the truck had non assisted manual brakes originally)

So what master cylinder and booster do you guys run when swapping to rear disc and do you run a proportioning valve?

 

[rab]

anyone ?

 

[ZMan]

I have cobra brakes all around on my '92 with the stock master/booster. I took out the abs module and installed a summit racing proportioning valve. I have been told the proportioning valve isn't necessary, but its on there already.

 

[AllanD]

No it isn't.

People point to all sorts of shit attached to brake systems and say "proportioning valve"

Typically what they are pointing to is a "pressure differential switch" which detects a partial system failure...

Rarely what they are pointing to is a "residual pressure valve" (typical for GM vehicles)

BRAKE PROPORTIONING is accomplished by mechanical means, typically by matching the rear components to the front components, but typing out a complete explanation is beyond my patience and attention span...


if you really have an issue you can buy an adjustable "proportioning valve"
these are typically installed in the engine compartment next to the master cylinder in the metal line to the rear brake hydraulic circuit, to limit rear line pressure.

Be aware, some states prohibit installing them where they are accessable to the driver when the vehicle is in motion...

I have an older Kelsey-Hayes valve around here somewhere, it has a knob for the adjustment, but the one I would buy myself is actually made by Tilton, it has a lever for adjustment and seven preset positions as well as a locking button to prevent unintentional adjustments...

 

[rab]

ok so my stock 88 mc and booster should be fine, or i guess i will at least try it out that way first.