I got to thinking about proportioning valves today for no particular reason, and an idea occurred to me that I would like to get some feedback on. I'm running front and rear disc brakes, using the Explorer setup like a few others on here. I'm using the disc+drum prop valve, (I think - the front disc conversion was done already when I got the car, so I can only assume) and I believe others are using the disc+drum prop valve as well. (Frank, didn't I read that you were doing this?) Anyway, my brakes work very well in this configuration. I don't think I'm getting more stopping force from the rear than the front. It's not like the tail wants to come around when I lock them up or anything like that. And of course the old "why fix something that ain't broke?" thing should apply here, but I'm still technically not running the "correct" valve, so I was wondering... There is no disc+disc prop valve for a Maverick, obviously. But there is a drum+drum valve. Does anybody see any reason why the drum+drum valve wouldn't be identical to a disc+disc valve? I mean it's not like the valve regulates the amount of force applied to the brakes, right? Just the "proportion" of force between the front and back. So wouldn't the proportion be the same with four discs as it would be with four drums? I'm probably not going to change anything on mine unless I just happen upon a drum+drum valve and decide to experiment. Just curious...
Best way to test them is in a mall parking lot on a rainy day, very early in the am. Get up to at least 45-50 if you can and lock them up. As long as the rear stays put, your ok.
I'm running power disc/drum brake system w/ after market prop valve. Works "Great" had to play with the valve setting alittle b-4 I got it just "right" tho alittle touchy at first. Two yrs. ago I had a WOMAN pull out right in front of me from a side st. I was @ 35 miles per hr. I slammed on the brakes stopped the car dead in its tracks & thanked the lord for GOOD brakes. Good Luck!
Sounds like fun. Safer than the way I tested it the first time... I'll do that. I expect it will be just fine though. My brakes work great, I've just got this nagging curiosity about proportioning valves.
i haven't done any research on the maverick proportioning valve, but most are built in to a combination valve with other valves like the metering valve and if you have drum brakes then it needs a residual pressure valve to keep a small amount of pressure in the system to keep the wheel cylinder piston cup seals from collapsing. which if you have disc brakes on the back then your pads may not be able to fully return away from the rotor, causing them to drag a little bit.
Nope, but that's a good lookin' car... And there's my answer. Guess I need to see if my rear brakes are dragging. I don't think they are...
Now you get an idea how it would look with chrome bumpers. I like the black on yours. I also like the OTHER video
I will have to disagree. I grew up on drum systems and have never seen a drum system that had any kind of valve as you described.
all the valves are built in to one combination valve. i pulled most of my info out of my school books. but like i said i don't know if it's on the mavericks or not, my book says it's on ALL cars with drum brakes.
Seen this topic of residual pressure on here quite a bit. As far as I could remember the old Fords use the master cylinder for residual pressure. Found this link that describes the systems very well. http://www.cometeastcarclub.org/PDFs/BrakePlumbing.pdf
your right. but then it says when ford started using front disc brakes they moved the valve out of the master cyl. but where did they move it to?
my brother in law has a disk/drum setup without a standard prop valve,he just uses and adjustable valve on the rear only.any opinions on this type of setup? i wads thinking of doing the same.
They removed the residual valve from the front circuit in the master cylinder when equipped with front disc brakes. The residual valve is still in the master for the rear circuit(drum brakes).
