Proportioning valve.

I seem to be havng a bit of difficulty in locating the stock proportioning valve. I have located the combination valve, in front of the passenger firewall, but seem unable to locate the prop valve itself. My garage is tiny and it is hard to get it far enough in the air for me to crawl under.

I've got a track day coming up and would really like to replace the stock one with an adjustable tilton unit., as the new big stuff has the rears locking just a taste before the fronts and i do not want to suffer the embarrasment of a backwards exit from the course.

Hopefully, trying to go straight
chris

 

Hi Guys,

It is getting late this evening, but tomorrow, I'll have a shot at it, (as long as "she who must be obeyed" hasn't other plans).

If the little item is buried, i may rig up a bypass t and install the tilton unit within the front compartment. Bending steel pipe for interior installation seems like more work than i want to go through for something that might get used once or twice, maybe on track days.

My main issue with the F50 set up on the front and 360 challenge on the rear is that with the 1-1/16th wilwood tandem master cylinder, the hydraulics have worked out so that i need the "70 %) reduction brought in sooner - the rate of reduction might be fine but with all of the increased hydraulic and mechanical improvement, i need that proportioning to happen sooner.

Big "AH HA" for me - once again - i find that i didn't know as much as i thought.

It is humbling but fun to learn how the bits work.

thanks for the help,
chris

 

Greg,

You are right on the lift thing. I still have to use jack stands and even with them up to the max, it is cold on the floor, there is little room to swing a wrench, what i want is a two post hoist - but what i'll probably get is taller stands and another floor jack.
Too much work yesterday, so i didnt make it to the shop, will get to it tomorrow.

What i am going to do is either gut the stock prop valve or replace it with a coupler, then install the tilton valve under the hood, so it is somewhat accessible, probably set it up by the master cylinder.

Bigger brakes are for naught if the lever gets bumped off its correct position. I'll probably do some experimenting with the valve settings, find one that seems about right, then pull the handle, so it doesn't get bumped.

thanks,
chris