braking

[tudorbilll]

Anyone know when ford started using proportioning valves in there braking systems.im putting disc on the front of my 53 merc I know i,m going to need something. but what kind

[flatheadmurre]

Mixing parts by an aftermarket adjustable one...that way you dont need to rip it apart again.
Make sure you start with a master that take discs.

[V8 Bob]

Originally Posted by tudorbilll

Anyone know when ford started using proportioning valves in there braking systems.im putting disc on the front of my 53 merc I know i,m going to need something. but what kind

Factory FoMoCo disc/drum cars from '65 were the first to use proportioning.
You always want to use an adjustable proportioning valve in any custom non-stock disc/drum or disc/disc system. Some, if not all, of the first valves used by Ford were also adjustable!

[paul2748]

Adjustable proportioning valves are available through the street rod shops and Jegs or Summit.

[miker98038]

I don't disagree with any of the above. Some aftermarket conversions (at least for 55 birds) include different rear cylinders, supposedly eliminating the need for a prop valve. Didn't work well in my case. You're going to want to start with a disc/drum master, then you have to consider residual pressure valves, and adjustable pressure valves. Some factory combination valves include some or all of the above.

If you're doing this on your own, go look at the aftermarket company kits,


http://ssbrakes.com and
http://www.abspowerbrake.com

Are two that I've used.

You don't need to buy a kit, but look at what's included. You'll need a good double flare tool, and maybe some other tools to make up the lines right. All doable, but brakes are not a place to make a mistake. If the old brake lines haven't been replaced, think about that. If you didn't do the hoses, they're next.


My bird went from drum/drum, to disc/drum, to disc/disc, over the years. When you make an upgrade, the weaker parts show up.

Well worth the effort to do it right.

[fordor41]

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You should consider a metering valve in the front brake circuit. That will eliminate the front brakes from taking all the brake load. Also I installed an adjustable PV on my '41 with disc/drums and didn't see any difference with the valve adjusted all the way in either direction. The difference may really show in snow or ice but I don't plan on driving in either but I have.