Sn95 stock prop valve in fox doing 5 lug

[Farmers SN95]

I am do a 5-lug swap on my 89 I have dis 5-lug 8.8 and the front spindles off a 94 Gt,

And going to get the brake booster/master cylinder out of a 95 V6 mustang, just like to know if I can used the 95 V6 prop valve in my fox?

 

[macjr]

yes it does work but when you get it from the wrecking yard get the fittings also, it is a pain to get them from an auto parts store. get the non abs version. it has 5 ports and the back one is for the left front i believe. get a adjustable prop valve to adjust the bias because of the lighter fox body. you will need to cut and re flair the lines so if you are not comfortable doing this find a buddy to do it. I just did one last week and am converting mine from the old ssb kit to the sn95 sstuff so it looks stock.

 

[jrichker]

It will work, BUT the brake balance will be off. The SN95 cars are a lot heavier and have a different weight distribution. This means the rear brakes may lock up sooner than they should. When the rear brakes lock up too soon, the rear end tends to swing around. Doing a 180 degree turn when you make a panic stop on wet pavement isn't fun...

See summitracing.com for adjustable brake proportioning valves.

See 87-93 Mustang 5.0 Brake upgrade pages. Improve your 60-0 times! for the best and cheapest brake upgrades and 5 lug swaps. The site doesn't sell anything but some fittings, but the tech notes are great. It tells you what junkyard or remanufactured parts to use to upgrade your brakes. It has almost everything you could want to know about Mustang brakes on it.

 

[Mustang5L5]

Gut your stock prop valve and run the plug an an adjustable unit.

Running the prop valve from another vehicle is not the best way.

Plus with the adjustable valve, you can increase rear brake bias if you put some sticky HUGE tires out back

 

[NIKwoaC]

Sorry if this is a bit hijackerish, but how easy is it to make the right adjustments on an adj. prop. valve, and how reliable are they to not vary from your setting? It seems to me that just turning a knob is kind of flimsy in terms of controlling your brakes. I ask because I'm in the early stages of planning a 5-lug swap for this winter.

 

[Mustang5L5]

The knob is make by Wilwood which has an excellent reputation and is widely used in a lot of professional racing series.

It's pretty foolproof. Turning the knob just restricts fluid flow by mechanical means. Simple and repeatable. It's no different than a static prop valve other than the knob allowing you to adjust

 

[Farmers SN95]

How do you gut the prop valve? is their a link that shows how to do it?

ok I need M-2450-A (plug)
and a adjustable prop valve, is that all I need? If so I will order it today.

 

[jrichker]

See the link I posted earlier. There is everything you could want to know about fox based Mustang brakes.
To the best of my knowledge, it is all accurate and workable. I have used it to add rear disk brakes to my
previous 89GT and it all fit exactly as described in the tech write ups.

 

[macjr]

I agree with what is said, however i did say in my reply that you do need to use an adjustable prop valve for the lighter weight of the fox mustang. I like using the sn95 prop valve because i bought the valve and master cylinder in good condition for $40 and that included the master cylinder to prop valve hard lines and the other three fittings. it makes a cleaner install and works quite well. if you google sn95 brakes there is a guy that tells the pros and cons of all the swaps out there. not sure if it is the link that was mentioned earlier. but there was a lot of good input here.