What proportioning valve do I need?

[suspect]

72 c10, swb, 383/700r4, front wilwood d54 12" diam X 1 1/4" rotors, rear wilwood d154 12" diam X 1" rotors, front lines 1/4", rear lines 3/16"

This is the booster I have on order.....http://www.classicperform.com/Store/...ck/6062BB9.htm

I have the Wilwood master cylinder 1 1/8" bore.....http://www.summitracing.com/parts/wil-260-8556

I don't necessarily have to have a wilwood prop valve, but these are the 2 I'm eyeing right now.

This one has 3 outlets. Do I just plug off one hole? http://www.summitracing.com/parts/wil-260-11179

This one is single in/out. Am I able to plump straight off the master cylinder and go right into the front brakes? Then plumb this prop valve just for the rear brakes? http://www.summitracing.com/parts/wi...0922/overview/

I kind of like the single in/out one. What's the best way for me to set my brakes up? I'm open to other suggestions also. Thanks, Daniel

[jocko]

I'd be tempted to day you need a dual inlet/dual outlet prop valve (as in the factory setup), however, I'm not as up to speed on high perf braking systems as I'd like to think I am In your case, since you have a Wilwood Master Cyl and a disk/disk combo (pretty darn nice setup you have there) - I'd go to the trouble of calling Willwood's Tech line and ask the following (I am of the mind that brake lines should be the same diameter for front/rear on a disk/disk setup - but maybe Wilwood can confirm):

I have a Wilwood MC part # umptifratz and front/rear disk brakes...
- is this the right MC for a disk/disk setup (I think it is correct)
- can you please recommend the correct prop valve for this
- and, I am currently running the factory disk/drum sized lines (i.e. 1/4 and 3/16), should I run all the same diameter lines, and which diameter (1/4 or 3/16) for this particular MC/disk/disk combination?

Wilwood:
Phone: (805) 388-1188
Fax: (805) 388-4938
Email: customerreply@wilwood.com
Hours: 7:30am - 5:00pm PST Monday - Friday

[67 chevelle]

I would run a disc/disc combo valve , if your back brakes lock first on a dirt road [ I seriously doubt they will ] then and only then would I put a proportion valve in

[screaminchevypickup]

You really don't even have to have a prop valve with that master but if you want I would just run a adjustable one on the rear line..
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[suspect]

I suppose I'll go ahead and try it out without a prop valve. Add one later if it isn't working out.