1965 fender mounted brake proportioning valve necessary?

[HoosierBuddy]

Hey guys,

My 1965 is equipped with a 1967 dual reservoir master cylinder. It's got the stock drums in back and Wilwood disks in front.

The way the brake lines run now is:

1. The line for the rear brakes comes off the master cylinder, runs to an adjustable wilwood proportioning valve and then heads under the car towards the back where it tees and goes to each rear drum.

2. The line for the front brakes goes to the stock proportioning valve mounted to the fender (that has the rear brake port plugged) and 2 lines leave that block, one to the left front brake and one to the right front brake.

While replacing the line from the master cylinder to the stock, fender mounted, proportioning valve block, I stripped the threads inside the darn brass proportioning valve.

I ordered a replacement from NPD....but the question occurs to me:

Do I even need the darn thing? Wouldn't an inline tee serve the same purpose since I'm handling the front/rear bias through the aftermarket proportioning valve.

Thoughts?

Phil

[mjb1032]

The car probably only had a distribution block, so they added the in-line proportioning valve.
Here's a pic of my 68's distribution block (which also contains a pressure switch)...


If this is what you have, there's no proportioning provision.
You still need to add one. A tee can't limit pressure, which is what keeps the rears from locking up before the fronts.

[slim]

The original 65/66 had the single compartment master so there was no distribution block. If the car came with front disc brakes from the factory it would have had a proportioning valve.

When the 67 master and disc fronts were added the person doing the mod would know if you are observing a distribution block or a combination dist and prop valve is what you have. A pic would help.


Slim

[merfsiu]

you are already bypassing the DB for the rears so thats not an issue. I would think that you could replace the DB with a tee for the fronts but IMO I would reroute the rears through the db and put the PV inline after the DB block and then you can wire you brake warning light back up. with the rears bypassing the DB the warning light should be on constantly.

[CHOCK]

Originally Posted by HoosierBuddy

Hey guys,

My 1965 is equipped with a 1967 dual reservoir master cylinder. It's got the stock drums in back and Wilwood disks in front.

The way the brake lines run now is:

1. The line for the rear brakes comes off the master cylinder, runs to an adjustable wilwood proportioning valve and then heads under the car towards the back where it tees and goes to each rear drum.

2. The line for the front brakes goes to the stock proportioning valve mounted to the fender (that has the rear brake port plugged) and 2 lines leave that block, one to the left front brake and one to the right front brake.

While replacing the line from the master cylinder to the stock, fender mounted, proportioning valve block, I stripped the threads inside the darn brass proportioning valve.

I ordered a replacement from NPD....but the question occurs to me:

Do I even need the darn thing? Wouldn't an inline tee serve the same purpose since I'm handling the front/rear bias through the aftermarket proportioning valve.

Thoughts?

Phil

You got it.

The brass block is nothing more than a T--Nothing more, No proportioning at all.

My only question is, Which port of master goes to which end??

Front port always to rears, Rear port of Master to Front.

Dan @ Chockostang

[1966ford]

My '66 with 4-wheel drum brakes and a single bowl master cylinder had a distribution block. If you have a proportioning valve to the rear brakes as you stated and you have a distribution block like the one in the attached picture, the answer to your question is yes: a tee fitting will accomplish the same function as the distribution block with the port for the rear brakes plugged.

[HoosierBuddy]

Originally Posted by 1966ford

My '66 with 4-wheel drum brakes and a single bowl master cylinder had a distribution block. If you have a proportioning valve to the rear brakes as you stated and you have a distribution block like the one in the attached picture, the answer to your question is yes: a tee fitting will accomplish the same function as the distribution block with the port for the rear brakes plugged.

Yes. That's exactly what I have.

FWIW...response to earlier poster...the 1965 doesn't have a brake warning light.

AND...I misspoke earlier. The part I ordered from NPD is called, "DISTRIBUTION BLOCK EXACT REPRO MOUNTS TO INNER FENDER APRON BY MASTER CYLINDER"

Thanks for everyone's help!

Phil