Brake Proportioning Valve for Toyota Brake Lines

[landtoy80]

Anyone use the Brake Proportioning Valve for Toyota Brake Lines from Racer65?
Shutterfly

I need to put a proportioning valve in before the snow flies.

 

[landtoy80]

Ordered it and got it fast, thanks Racer65. Good guy to deal with.

Pulled it out of the box and its all metal and solid. Have yet to install it. I did blow through it
but couldn't tell any change when increasing and decreasing the valve. It claim is
"Brake bias is adjustable, with range of 100 PSI-1200 PSI pressure (0 to 60%). I have a brake pressure gauge so I will
hook up the gauge and see how much pressure changes. The valve doesn't close all the way. It has arrows on it
so you need to mount it in the correct direction.

I need to decide what front to rear ratio to start with. Snow is around the corner so testing in snow should be soon.

 

[Golgo13]

I look forward to reading about your results. Is there any other way to tell the bias amount outside of checking with the gauge?

 

[landtoy80]

I would only guess using your foot and eyes would be the only other way. Put you foot to the floor (brake) and look for skid marks. Adjust till the rears dont lock up before the front does.

Years back there was a brake shop that had a dino that tested each axle (may of been each wheel) for brake resistance. Not sure how it worked
but if you found a shop with the dino you could have them set up the brakes with the valve, maybe???

Note this setup is for when you remove the well rusted LSPV and the dangerous anti-lock brake system when it decides to reduce brake pressure (it thinks your brakes have locked up when they are not).

 

[landtoy80]

The valve has 10mm X 1.0 female inverted flare fittings.
Is which fitting do I use?
I have a double flare tool. Is this a different type of flare?

 

[landtoy80]

This proportioning valve mod is on hold at this time till I can get some answers from the manufacturer.
I hooked up the valve using the stepped nuts fitting from the 80. I had leakage from the fittings. I could get the leakage to stop but I had to over tighten the fitting. I need to find out what male nut fitting I need to use?
I need to find out if the valve can handle the pressure of the 80's disk brakes system. I assume the 80'd pressure is much higher pressure than the 40's brake system.

When I did test the valve, I got reduced pressure using my brake pressure gauge but with the seeping/leaking of fluid from the fitting, I am not going to post the pressures. The pressures did change with the turning of the valve. When I drove and did hard braking, adjusting the valve did reduced rear brake lockup but I still did have one rear wheel partially lock up or fully lock up depending on where I had the valve set. I assume the one wheel locking was from the leaking/seeping fitting so I couldn't get a good bleeding of the system.

I got a loud noise from the valve when bleeding the brake. It went away when I removed the valve. I assume it was the fast rushing fluid through the valve and past the reducer.

 

[landtoy80]

Back on track.
The valve can handle the pressure of the brake system.

I tried to use the LC's stepped brake line fittings to connect to the valve and they leaked (might of been the flaring tool, I returned it as I wasn't getting a great flare). I bought some standard all 3/16 10mm x 1 all threaded inverted brake line from parts store. Used a 10mm x 1 double female coupler to connect the stepped fitting to the all threaded fitting with no leaking.

When bleeding the brakes there is a noise from the valve. Not sure why it makes a noise.
I mounted the valve on the CC bracket only because I didn't want to do an more bending of brake line. I bent lines all over the place when removing the ABS unit. I think I might just order new OEM line and see if that works or have a shop bend me some lines so it looks a little better under the hood. Looks like a glob of spaghetti right now.

Anyone know if the fitting going into the ABS unit is inverted or bobble flare and what side the fitting is 10mm x 1 ?
If inverted and is 10mm x 1, I think you could just hook up the valve with those fittings.

I have yet to do testing now that I have all the leaking fitting fixed. I just got new tires today and will wait for the snow to fall to adjust the valve.