Now I know Adams can answer this?? How much residual pressure should one have on a brake system at rest?

[JIPJOBXX]

I know my master cyclinder has a check vlv and I think its used to hold back some residual pressure on the brake system but how much?  Or I'm thinking right??

 

[JIPJOBXX]

One day why I was out and about a guy at a parts store showed me this inline device that maintains the pressure it regulates the return pressure on the system.  I did not get the name of the item but it looks like it would do the trick to keep a very low positive pressure on your brakes.  This would not over power the return spring but just keep fluid system.

[Don Coatney]

You got your brakes fixed and now there are 3 new threads on brake issues. Are your brakes still not working?

 

Your master cylinder has a built in residual valve and I am making a huge assumption that yours was rebuilt correctly.

 

After market residual valves are typically used on disc brake conversions after the factory residual valve has been disabled. Most disc brake suppliers recommend a two pound valve on the front and a five pound valve on the rear.

 

I must ask why you are looking at aftermarket residual valves? Have you given up on repairing your stock brakes and are you thinking of going with a disc setup?

[De Soto Frank]

Less pressure than is required to activate the hydraulic stoplight switch.

Edited October 16, 2013 by De Soto Frank

[greg g]

What? You mean nearly zero.  That would be like.................. oh wait!! Can it really be???

[Plymouthy Adams]

MC's for drum brakes are 6-8 lbs...with some just rounding it to a 10 lb residual...

 

stock...if you go altering..your values will be different according to the very system and configuration you are setting up..

Edited October 16, 2013 by Plymouthy Adams

[JIPJOBXX]

I have rebuilt my m/c twice and still notice right after I bleed down my brakes that my pedal still feels soft but I can live with this.  Now I think it is the check vlv in the mc unit itself and so this is why I might just go ahead and install two inline check vlvs to see if this might relieve this problem.  It is flustrating to bleed the brakes and have great hard pedal and then in a matter of just a short drive to have this soft pedal effect.  I was in a automotive parts store at the counter and a guy was standing next to me and was holding two of these inline units in his hand.  He stated to me he had problems with his brakes and these little unit resolved this situation.   My main concern is do I install a 1 to 2 lb inline check vlv  or do I install a 10 lb inline check vlv.  Will the tail light stay on with the system at 10 lbs or could this put to much constant pressure on the brake system itself.  I know I stated that I had completed this brake thing but I'm just trying to fine tune it. I have no other car in witch to tell if my brakes are working the way there suppose to but when I take it out for a spin I can get all four tires to stop at the same time and no dragging to one side or the other.  I do not know if changing out those hyd lines did anything but I did it anyway.  So what to do??? If the tail light stays on I might just install the two unit on the Y block that feeds the frount brakes and see what happens then. That way I still will have the right pressure to operate the stop lights.   And please Don if you have nothing to say thats good please just read and no comments.

[JIPJOBXX]

Ok what is happening I went out to my Dodge this morning and the brakes are right up where there suppose to and little or no spring noise?  Well I will take it out in a few minutes and see what happens?  And will get back.  Thanks for all the help!

[JIPJOBXX]

Ordered up two inline pressure regulators at a price for 25 dollars and some change.  I should have them installed this weekend and will let anyone here know of if any difference they make in my braking preformance.  My brakes work ok but still I woould like to have a little harder pedal and this might just due the trick.  I'm going to install them just after the "Y" block for the frount brakes and so this should not have any effects on the stop lights.    

[JIPJOBXX]

Installed one of those devices on the old Dodge and well lets put it this way the unit is on it way back to where it came from.  It worked but 10 lbs was way to much pressure and the drum wound'nt even begin to budge.  Anyway thats that and onward and backwards as I say.  Jon

[Plymouthy Adams]

the question remains and was not mentioned by yourself.........but you did think to defeat the original residual valve in your masters..................or did you..????/

[JIPJOBXX]

No but when I get back to that I might just see if there might be some debrie stuck in the rubber valve area where it checks at  But that is on the back burner for now.