Proportioning valve

[Bron67]

I bought a proportioning valve for disk brakes, but like the idea of the adjustable one. Some of you probably have ran both. If so, what are your thought's?

[CityHick]

Re: Proportioning valve

Is it a proportioning valve for 4-wheel disk or front disk rear drum?
I too like the idea of adjustability but on the other hand its just something else to screw with. I have the non-adjustable prop. valve from WH for disk/drum and it does the job well. My rig stops pretty well for running 37" tires!

[Bron67]

Re: Proportioning valve

It's for disc/disc. I'm running 44 tsl's so i'm looking for a little better braking.

[welndmn]

Re: Proportioning valve

With 44's better brakes will come with upgrades and spending $.
A proportioning valve does nothing but restrict fluid flow / pressue to normally the rear brakes so they don't lock up. You restrict them until they lock at the same time as the fronts.
With 44's unless you already have nice brakes, I don't think you are locking them up right?

[Bron67]

Re: Proportioning valve

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With 44's unless you already have nice brakes, I don't think you are locking them up right?

No they don't lock up. My rig is not street legal, and my brakes were ok for trails, then my rear calipers would'nt release. I have 4-wheel disc with the stock drum/drum m/c. So I bought a new M/C for disc/disc and proportioning valve. I traced my problem down it was my line lock that would'nt release the rear calipers even with it disconnected. I'm just trying to decide between proportioning valves. Is the adjustable one better than a non-adjustable one?

[TBS-POPS]

Re: Proportioning valve

Adjustable is always better than non.. you can fine tune it for your particular vehicle and the weight transfer it shifts when braking..every vehicle is different... Better braking with 4 discs needs a larger bore MC, the P-valve will only keep the rears from locking before the fronts,NOT improve the braking...Lock-up is max breaking force, you just have to control it....hence anti-lock brakes.... for vehicle control and safety... class over

[Bron67]

Re: Proportioning valve

Thanks Pop's, I know how a proportioning valve works and about the m/c. I was just trying to get a straight answer if a non-adjustable was better than an adjustable proportioning valve.

[Fordfreak]

Re: Proportioning valve

Adjustable is always better than non.. you can fine tune it for your particular vehicle and the weight transfer it shifts when braking..every vehicle is different... Better braking with 4 discs needs a larger bore MC, the P-valve will only keep the rears from locking before the fronts,NOT improve the braking...Lock-up is max breaking force, you just have to control it....hence anti-lock brakes.... for vehicle control and safety... class over

x2 non- adjustable can never be where you want it for your vehicle. you might even find you leave it wide open as on a 4wdisc mustang i had with a small disc rear conversion and biggey [wide] tires.

[welndmn]

Re: Proportioning valve

IMO, if you're not locking up your tires, you don't need a prop valve yet.
I would spent the money on a Master Cly, or better calipers.
I run the normal 1/2 ton GM calipers with a Wilwood Master Cly and my rears lock up easy, stand on it on it, and fronts locks.
All Manual brakes for me as well.