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Proportioning valves in series
http://www.woodsbuggy.com/phpBB3/viewtopic.php?f=10&t=2837		 Page 1 of 1
Author:  Odyknuck [ Sun Jan 27, 2008 9:22 pm ]
Post subject:  Proportioning valves in series
The buggy I recently acquired has a proportioning valve for the front and one for the back. The concept was to be able to change the brake Bias from street to trail. I don't need it for the street so I really dont need both. What I'm considering is to put both of them on the front disk brakes in series. Typically the valves give you a 50% turn down ratio. So with two in series I can get up 75% turn down ratio. That way I would have better control of the front brakes. Any thoughts on this Ideal. My red buggy has a seperate brake system operated by its own handle. I like this set up because it gives me the ability to use the front brakes on demand however its just one more thing to deal with.
Author:  Firebug [ Sun Jan 27, 2008 9:42 pm ]
Post subject: 
I use a single proportioning valve. I have it set max to rear brakes. I can seperate the front brakes to a handle for trail (the proportioning valve is not used here at all) , or flip a couple of ball valves and use all 4 brakes on the foot pedal for street (this is where the pro. valve is used). This use of proportioning valve works great for me, even on wet roads. I don't see a use to go any other way. 8)
Author:  purplerail [ Sun Jan 27, 2008 9:55 pm ]
Post subject: 
have a supplier for ball valves?
Author:  Firebug [ Sun Jan 27, 2008 10:01 pm ]
Post subject: 
I got mine from Granger. Used them for several years now with no problems...Makes a good line lock too,,cheaper than those empi things. :wink:
Author:  Firebug [ Sun Jan 27, 2008 11:12 pm ]
Post subject: 
1PZB2
Mini Ball Valve Kit, Size 1/8 In, MNPT x FNPT Connection, Rated For 450 PSI WOG, Reduced Port, Material of Construction Forged Brass, PTFE Seats APPROVED VENDOR
1PZB2 1 Today $4.66 2885


1PZA7
Mini Ball Valve Kit, Size 1/8 In, FNPT x FNPT Connection, Rated For 450 PSI WOG, Reduced Port, Material of Construction Forged Brass, PTFE Seats APPROVED VENDOR
1PZA7 1 Today $4.66 2885
Author:  fortydegnorth [ Wed Jan 30, 2008 10:49 am ]
Post subject: 
Odyknuck, I thought the same thing about two proportioning valves in series. I just don't have room for a seperate handle operated brake. I am required to have a cable operated e-brake for the street here and that takes up the space between the seats. The shifter is in front of the e-brake and the cutting brake is in front of the shifter. By the time all those are in line I'm up to the dash. I thought I could mount a couple proportioning valves in the dash for easy access. I paid to much for my front brakes to not use them! Let us know if you try it.
Author:  Odyknuck [ Wed Jan 30, 2008 1:29 pm ]
Post subject: 
Ok, I have my front brake setup on the red buggy mounted on the left side of me near the frame. It does not have to be in the middle. I will keep you posted on what route i take on the new buggy.
Author:  Bad Influence [ Thu Jan 31, 2008 10:04 am ]
Post subject: 
[quote='Firebug']I use a single proportioning valve. I have it set max to rear brakes. I can seperate the front brakes to a handle for trail (the proportioning valve is not used here at all) , or flip a couple of ball valves and use all 4 brakes on the foot pedal for street (this is where the pro. valve is used). This use of proportioning valve works great for me, even on wet roads. I don't see a use to go any other way. 8)[/quote]

This sounds like the setup I would like to run.
Author:  Firebug [ Thu Jan 31, 2008 12:32 pm ]
Post subject: 
I will get pics later. 8)
Author:  Firebug [ Fri Feb 01, 2008 11:59 am ]
Post subject: 
Here are the pics. I know it is a little confusing and hard to see. I will try to explain. Remember this is just an option that works well for me and lots of buggies have different ways of doing the same thing or better. See the master cylinder. It has 2 lines coming out. One line goes strait to the rear brakes via the turning brake. The other brake line goes through a ball valve ( allowing you to turn the front brakes off of foot pedal). Then from this valve to the proportioning valve ( allowing correct portion of pressure to go to front brakes). From the pro. valve to a T ( a place for the brake lines for the foot pedal and the hand handle to meet up on the way to the front brakes. Now speaking of hand handle for front brakes. See the line coming from the the other little master cylinder, it goes through a ball valve also (so you can shut off the hand handle so the pressure wont feedback when you are using the foot pedal) and goes to the T . This is the ball valve I use when towing to lock the front wheel brakes...Just pull handle to make pressure and lock the valve. I will do this to the rear some day to have 4 wheel parking brakes for towing or whatever.
Image
Author:  Firebug [ Fri Feb 01, 2008 12:02 pm ]
Post subject: 
Notice the first ball valve is closed and the second open...this is for offroad. The hand brake master cylinder for front brakes is a clutch master cylinder from a Nissan. The ball valve from it to the front is open for use.
Image
Author:  Firebug [ Fri Feb 01, 2008 12:04 pm ]
Post subject: 
Here is the front brake handle,,,I know its ugly and needs painting. Paint is weight. Not really I'm just lazy
Image
Author:  Firebug [ Fri Feb 01, 2008 12:05 pm ]
Post subject: 
My daddy says it looks like a stump full of granddaddy spiders.


Image
Author:  Bad Influence [ Fri Feb 01, 2008 12:29 pm ]
Post subject: 
Very nic pics Firebug!! Thanks for posting them. It will help allot when I start on my brakes. :)
Author:  redrail1915 [ Fri Feb 01, 2008 8:20 pm ]
Post subject: 
firebug i have a turning break like yours could not get t to work right if you need any parts you can have it just take up room
Author:  volksdude2007 [ Sat Feb 02, 2008 12:25 am ]
Post subject: 
do you have any problems with that damn bottle on your master cylinder mine leaks like a siv can never keep fluid in it i am going to try and get a billet aluminum one or somethin other than the plastic bottle
Author:  purplerail [ Sat Feb 02, 2008 12:28 am ]
Post subject: 
the cheap screw ins suck go find you an import from the salvage yard
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