Inline Tube Prop Valve on a 1st Gen

[AJs72K5]

Got my new valve from Inline Tube this morning. Looks solid. But, it threw me off a little. There are two outlets for the front brakes. Is everyone running an additional line for the fronts, or are they capping the upper outlet with a bleeder screw or something similar?

Here's the diagram that came with it.

Here's what's on the truck now (one line out of the prop valve for the front brakes):

Help?

 

[makovai]

i beleive thats the same valve i used. i just plugged it off. I remember calling the builder cause i wasn't sure what to do with the extra hole.

 

[bp71k5]

Yep, I plugged mine as well. I actually think you can use a bleeder valve there instead of just a plug since it's kinda tough to bleed the air out of the valve without one. The old valve has a bleeder there, but the threads are different on the new valve.

 

[AJs72K5]

The 3/8" fine pitch bolt is proving difficult to find at the Napa and Autozone type stores, especially in a length less than 3/4". I'm guessing I need a length around 3/8" - 1/2". Looks like a trip to the bolt store is in order.

 

[bp71k5]

Actually, it's not a bolt, it's a brass fitting plug. I got one at the hardware store and they had them at the auto parts store as well. Autozone doesn't have much like that.

 

[AJs72K5]

That makes more sense. But, I got to thinking about it...since the whole idea is to get more fluid down the lines, wouldn't it be beneficial to use both ports for the front brakes? Take out the existing tee and run a separate line to each front caliper? Has anyone done this and what were the results?

 

[bp71k5]

I think the later model k5's had this valve down on the frame near the junction block to both replace the tee and use two lines for the front. You might be able to get a set of 73+ front brake lines and redo them that way, but it wouldn't look "stock".

Otherwise you'll need to bend up a hardline and run it out to the wheel. I'm not sure it's going to do much since they came from the factory with a single line anyway. Since they self-adjust, disc brakes tend to depend more on high pressure than large amounts of fluid flow on each depression of the brake pedal.

 

[Yukon Jack]

I agree with bp71k5 - the brake calipers don't care how the fluid gets to them - its about pressure, the fact that two lines would give you twice the amount of brake fluid doesn't change the amount of pressure your booster is going to exert on the fluid. That is why brake lines are rather thin, all your calipers need is pressure.

 

[72BigBlazer]

I just bought a standard dial proportioning valve through summit instead of the stock style. Does anyone know how much the stock unit cuts the rear brakes? Mine is adjustable between 0-57%.

Josh

 

[makovai]

absolutely do not quote me on this but, i heard it was 60% front 40% rear.

 

[bp71k5]

When I was reading the inline tube website, I saw something that said their 4wheeldisc valves were 50x50. This seems odd to me since there would be no reason for a valve if you just wanted to have 50x50 proportion.