Plumbing Adj. Prop. Valve for Rear Disc Swap

[dznucks]

I am gearing up for a rear end swap that includes a rear disc conversion. I am using the caddy brake setup with CaptFab's brackets. I am running wide tires in the rear and want to run a Wilwood adjustable proportioning valve.

The stock master cylinder has a single 3/8-24 port for the front and the rear is larger line size. I have two questions regarding how to plumb this new valve in, as it has all 3/8-24 ports and two ports for the front.

Is this valve usable with my current setup without completely redoing the lines all the way to the discs?

Can the 2nd front port be plugged?

I'm am also curious about reducing the larger rear lines into the smaller port diameter. Will this hinder flow? or do discs require less fluid to operate?

Should i just get a regular disc-disc prop valve?

[k2rm]

I just plumbed a Wilwood adjustable valve into my system. The thread size for all of the ports is 3/8-24. I am not sure, but I think you can only get 3/8-24 inverted flare nuts for 3/16 brake line. So, you will need to run adapters to your original 1/4" brake lines going to the front and rear and to the MC.

This is not a problem as I did just that for about a year and the truck stopped great with both front and rear disks. I just bought a Wilwood tandem master, so for a cleaner looking install I re-plumbed the entire truck with 3/16 stainless lines. I only needed to use adapters at the rear T and front of the middle hose. They do have larger thread size nuts for 3/16" brake line, but I wasn't able to flare the SS wide enough so adapters were much easier.

Yes, the 2nd port can be plugged.

You will likely need adapters at your back brakes to go from the 1/4 brake line to the calipers which will likely come with brake hoses to accommodate 3/16 brake line.

I like the adjustable valve since it is easier to balance the braking better.

[dznucks]

Ok. Thanks.

Thats what i needed to know. I already got the rear lines figured out.

[k2rm]

Glad to help. Just be prepared for bending new lines from the MC to PV. They were a pain due to the angled inputs on the Wilwood valve.

[dznucks]

Thats nice Clark, real nice!

I wish I was able to find the chromed lines like you have. The ones i used arent so pretty and i painted them black after i installed them. Thanks for you advice.
I installed the valve in the horizontal position, under the master. Works great.