Brake hardware trouble

[dodge68charger]

I converted to a dual master cylinder because i did a front disc upgrade and kept the rear drums. The dilema is the line coming from the master cylinder for the front brakes has 1/2 threads and the front brake lines are 7/16 threads for the drivers n passenger lines.. I wanna use a 'tee' but cant find anything in those thread sizes for 3/16 flared tubing. The rear line from the master is 3/8 so those parts are eady to find just gonna incorporate a wilwood proprtioning valve inline. Also do i need a metering vave or residual valves. Thanks

 

[bm02tj]

auto stores sell adapter nuts or reflare on the correct nut

 

[Propwash]

Like bm mentioned, auto store may have it. Either that or the hardware store or the internet. Wilwood makes a combination proportioning valve you could route your lines to, with the adjustable valve for your rear brakes. Either that or you could use your stock distribution block for your drum brake set up and then plumb a regular adjustable proportioning valve in your line to the rear. All that distribution block is doing is splitting the front/rear brake circuits from the master. As far as a residual valve, what master did you buy? If you bought a master for a disc/drum combo, odds are there already is a residual valve installed in the port for the rear drums on the master. One way to tell if you have a master set up for a disc/drum combo is one of the two fluid reservoirs of the master (the front reservoir is for the rear brakes) will be much smaller than the other. The reason for that is Wheel cylinders hold much less fluid than a caliper. The purpose of the residual valve for the rear drum brakes is to hold a bit of fluid/pressure to the rear brake circuit and not let it boil all back up into the master. Being drum brakes have return springs to retract the shoes, the residual valve keeps more fluid to the rear as well as a bit of preload to the wheel cylinders. Hope it makes sense

 

[dodge68charger]

Fantastic. Thank you so much! The distribution block on my drum setup has a nut on the bottom flush with the bottom of the block. What was this used for?? When i put an airhose to the block the front and rear lines seem to be split in the block

 

[super-bee_ski]

Yup, I picked mine up at NAPA
Thanks "bm" and "Prop"

 

[Propwash]

No problem guys. That nut is an inert port with your vehicle. Just leave it where it is and you'll be fine. Sounds like your distribution block is working just like it should. It keeps the front and rear brake circuits separated and splits the front brake line from the master off to the front left and right wheel. Reason being, if there was a failure in the front or rear, it wouldn't take out the entire brake system and you would still have brakes on the other circuit. If they were all mixed in the distribution block, air coming in on a busted brake line lets say to the rear, would make its way to that block and then mix into your front brakes...No sweat if you're Fred Flintstone, otherwise pray the parking brake can save your bacon.

 

[dodge68charger]

Thanks for the help.