prop valve question

[85foxbody]

I have done a five lug conversion on my 85 fox using sn-95 stuff up front but kept the rear drums. So now i picked up a rear end from a 94/95 car. so my question is i know i need to gut my prop valve and put in an adjustable for the rears, but can i remove my prop valve and install one for an 94/95 car since i am using all parts from that year i'm also installing a 93 cobra master cylinder buy keeping my booster, dont want to mess with the strut tower.

[wraithracing]

I have done a five lug conversion on my 85 fox using sn-95 stuff up front but kept the rear drums. So now i picked up a rear end from a 94/95 car. so my question is i know i need to gut my prop valve and put in an adjustable for the rears, but can i remove my prop valve and install one for an 94/95 car since i am using all parts from that year i'm also installing a 93 cobra master cylinder buy keeping my booster, dont want to mess with the strut tower.

The simple answer is no. The best option is to either gut your proportioning valve or remove it entirely and use a T fitting for the two front brake lines. Then install the adjustable proportioning valve for the rear brakes. OEM valves are setup based upon the OEM vehicle overall weight, weight balance, and several other factors. One you start changing these items the setting will be off. Can it work, yes but in the end the ability to adjust to your specific combination will be the better option.

What is your actual brake combination as the 93 Cobra M/C may or may not be the best option depending on your actual components?

[85foxbody]

Thanks for the info Trey. My brake componants will be sn-95 disc all the way around nuttin fancy.... for now

[wraithracing]

Thanks for the info Trey. My brake componants will be sn-95 disc all the way around nuttin fancy.... for now

I understand that, but there are a couple of front caliper options that affect the M/C sizing and pedal "feel".

[85foxbody]

I understand that, but there are a couple of front caliper options that affect the M/C sizing and pedal "feel".

Sorry Trey i did not know there are different caliper options. The brand i went with was stoptech not sure of the specs, and will be going with that for the rear as well

[wraithracing]

If you have gone with Stoptech then you have some really nice brakes on your Mustang!

I wasn't aware of Stoptech having an upgrade for the rear calipers, I have only seen their front setup. The fronts have been on my Wish list for years, but the wife and kids keep spending all my play money and I haven't been able to pick up a set just yet!

I would definitely recommend talking with Stoptech or Maximum Motorsports in regards to the best M/C for you combination. Good Luck!

[85foxbody]

If you have gone with Stoptech then you have some really nice brakes on your Mustang!

I just look at the stoptech brakes and those are NOT what i have, as like yourself i too have a wife and kids that seem to spend any play money i can set aside for the car. The brakes i used on the front where powerstop a whole lot cheaper than stoptech. maybe some dsy stoptech will be on the car

[wraithracing]

Ok, then I would still determine what front calipers you have in regards to the single piston early V6/GT, the early Cobra dual piston units, the later dual piston calipers, or the later Cobra calipers. That will affect what M/C you should use. The rear calipers are all the same, the difference is the rotor diameter and the cradle for the caliper depending on the rotor size. Good Luck!