Technical Do these brakes need residual valve?

Single line master cylinder with no built in residual pressure valve located about 6 inches lower than the 4 drum brake wheel cylinders. Thanks

 

Pretty sure every drum brake car came with one. Even more critical with the master downhill.

 

All drum brake systems need a residual check or pressure valve. This is because they use return springs on the shoes and they need to be kept in tension with the residual pressure. Without this valve you will always have to pump the pedal up it to gain a decent pedal.

 

Get yer 10# RPV here....
http://ecihotrodbrakes.com/discbrake_kit_components.html

 

single line M/Cyl means it already has the factory residual valve installed. The add on valves are a streetrod item.

 

It's a Wilwood brand and doesn't appear to have a anything in the outlet port

 

Then yes, you will need to add one, if there is just one circuit. Two, if there are two.

 

With a low mastercylinder I would run two a 10 lb on the drums and a 2 lb on the disk.

 

Another example of BS information.
If you can't post correct info don't post.
A brake system with the M/C below the floor (lower) will always need a 10 lb. residual pressure valve for the rear drums and a 2 lb. residual pressure valve for the front discs.
If the fronts are drums then of course it also needs a 10 lb. residual pressure valve.

 

Yeeeeep. I just happen to have a single line master under the floor of one I got setting in the driveway now, I have added no residual pressure valves to it and the brakes work just fine.

 

Beano,I guess you,me and Tommy don't know what we are doing,,I don't have any residual pressure valves on my Deuce pickup and have logged over 22 thousand trouble free miles,,so according to Blue One we are just spreading BS misinformation. HRP

 

I just throw it out there, take it or leave it.

I'm pretty sure that you know what you are talking about but that Tommy well he's old you know.

Well I gotta fly, I got a Knuck that a fella wants converted to juice brakes in the garage.

 

Sacrilege!..Knuckleheads with out mechanical brakes are for sidewalk commandos with money!! HRP

 

Wilwood racecar master cylinders have no internal residual line valves, you can install an external valve on the master cylinder outlet port or in each line. Size will depend on brake design.

 

Take a wire like a paperclip and insert it into the outlet port of the MC. If it doesn't go in, you have built-in residual valve.

 

No residual valves and I am using a gennie first gen master. I am about an hour away from bleeding. But this is way off topic for the HAMB well that and most of these guys will think that when we say knucklehead we are talking about them.
If you think that is a sacrilege wait for my next big driver project. Think Mud Bogger with Slicks.

 

Whatever you guys
Obviously you more knowledgeable guys who have no residual pressure valves in your brake lines are using a M/C with a built in residual pressure valve.
My point even if I didn't make it well is that every braking system will have residual pressure valves whether they are built into the M/C or inline.
So it's not just a "streetrod" thing.

 

Perhaps when you are addressing someone old enough to be your father you should not call BS. Polite goes a long ways with our generation.
fact of the matter is that a lot of cars with jelly jars do not have residual pressure valves in line stock and I have yet to break one down for repair that had a residual pressure valve built in. When residual pressure valves became popular was when people who had not learned from the old guys (now dead guys for the most part) started having trouble with their brakes.

if you don't have leaks you don't get bleed back and the way that everyone adjusted their brakes were with the shoes just dragging. You would not know that if you didn't learn from someone who would have been my age and above when I was a teener.

Oh sorry for the drama, put this one on me.

 

Well there you go. The old adage of learning something every day. Or maybe I learned it and just forgot it somehow
That can happen with us old guys, I'm gonna be 60 in July if that can be considered old

 

Beano,you were never a teener..you were born old! HRP

 

Sorry blue. I thought that you were part of the boomer please die set. Tommy has only got about 10 years on us (give or take).

Like I said sorry for the drama.

Ha you must have known my dad. He always said that.

 

If you do run them I would make the front and rear split and valves as close to the master cylinder as I could.

 

Nope,but I suspect both your dad like mine was to be obeyed and knew how to use a belt for more than holding up his trousers. HRP

 

My fault I'm old school and incorrectly ***umed you were running a factory M/Cyl. Fruit jar, 56 Ford or something similar. I don't care for the new fangled stuff. I never wanted to spend the money for fancy stuff and always used a factory M/cyl. I'm over 35 so like they said back then you can never trust me. I'm an old fart and proud of it. Much better than the alternative.