Question on Proportion valve

Crawler Nut

Crawler Nut

Rock Corp 4X4 Club
Joined
Mar 15, 2011
Location
Hendersonville N.C.
Hello, I am building a jeep YJ Crawler with Rocks with pinion brakes. I have changed every thing about the jeep except the body an frame. We ran the brake lines today an put a Proportion valve on the front brake line, an cant seem to keep if from leaking.
My question is how important is a P-Valve on the front brakes of Rocks?
I did away with the stock booster brakes an now running a Wildwood master cylinder with no booster.
Is the P-Valve important or is it something I could just do away with? Thanks for your time.
 
Nothing is going to have great braking running 6.7:1 gears and pinion brakes no matter what, but in general--or pretty much always--the prop valve goes on the rear brakes, not the front as the fronts provide somewhere around 70% of your stopping power and it is the rear brakes you want to keep from locking up prematurely. Every aftermarket prop valve I've seen is 1/8 npt, did you use a iff brake flare to npt adapter fitting or compression fitting or what?
 
As far as rock crawling goes, no big deal on the P valve. Your rear will slide easier if you can lock them up, which is doubtfull. Pinion brakes cook the pinion seals pretty quickly.
Talk to Scott Waters @ Steelworks. He has a wheel end rockwell brake solution working. He is sswaters on here.
 
Thanks for all the replies. Just one more question. Why does every say if it has enough brakes? Is it true or am I wrong with pinion brakes you have 6.72 times the stoping power as you would only have 1-1 on wheel brakes.
 
Comes down to the small amount of friction material working against the huge amount of rotating mass. You will fade very quickly on a down hill run once it cooks.
 
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