Wilwood bias valve install?

[einstein57]

So my rear brakes are locking up under heavy braking due to my new bbk. I searched but can't find any good threads. Anyone have a good how to guide?

[Snowmann]

1. remove stock prop valve from line roughly 6-8" below the master cylinder
2. route line to desired mouting location
3. install prop valve.
4. route line to the "t" at the center of the car just in front of the axle centerline

I recommend the "click" style as the detents give you some form of positive location and adjustment... Tilton makes such a model... I have used both the wilwood turn valve and the tilton lever detent style and much prefer the tilton style...

I suppose the Wilwood unit would be just as good w/ a set of front and rear pressure gauges.

[erik325i]

You just need to plumb it into the line going to the rear brakes. The easiest way to do that is to install the bias valve in the engine compartment because you can install it in the line going from the ABS pump to where the stock brake valve is located. The downside of putting it there is it's not cockpit adjustable.

If you put the bias valve in the cabin, you get the benefit of being able to adjust it on the fly, but you have to make a much larger section of brake lines.

[shameless plug] I have both the Wilwood brake bias valve, and the Tilton lever style brake proportioning valve for sale[/shameless plug]

Erik

[Apps]

Erik how much for either of the proportioning valves?

[einstein57]

Well I would not want a cockpit mounted valve since its not a track car and i don't think i would be able to make it look factory.

[Jean]

Mount it on the e-brake console ;)

[erik325i]

Erik how much for either of the proportioning valves?

$35 for the Wilwood and $85 for the Tilton. Pm me if interested so we don't clutter up einstein's thread.

Erik

[erik325i]

Well I would not want a cockpit mounted valve since its not a track car and i don't think i would be able to make it look factory.

Then it should be easy. Just mount it anywhere between the ABS pump and where the factory rear valve is located. You'll only need to make a couple short sections of brake line. You can use hard lines or braided stainless line.

Erik

[briansjacobs]

Well I would not want a cockpit mounted valve since its not a track car and i don't think i would be able to make it look factory.

2 things, I dont understand BBK on street cars, and what do you car about remaining factory appearance when you have an BBK. Not hating, just dont understand the fashion before function colture we have these days.

[erik325i]

I dont understand BBK on street cars
Not hating, just dont understand the fashion before function colture we have these days.

I'm not trying to be argumentative, but by your standards all street cars should be stock?

Every car has a purpose. A race car is meant go be as fast as it can. A street car is meant to get you from point A to point B. Yeah, putting a bbk on a street car is just for looks. Getting rims, lowering your car, getting a front lip spoiler, getting a fresh paintjob is all just for looks, but nobody seems to have an issue with any of those things. On most street cars, fashion is function.

Erik

[einstein57]

I didn't think a braking system that was designed close to 30 years ago would be up to the task of slowing down a 300-400whp turbo e30. The stock brakes fade horribly after some spirited down hill driving. I auto x my car currently and plan on doing track events in the near future. A car does not need to be an all out purpose built race car to be fun and functional. And their is absolutely nothing flashy about my brakes. They just look like brake dust.

[briansjacobs]

No I do not think that all street cars should be stock. I am past modding street cars (I think, who knows) I have no problem with people doing it. He stated he has no plans on tracking the car so why BBK other than just fashion. I can not imagine fading the stock brakes on the street. I raced for years on the stock calipers with little to fade issues, the stock set up is good, want better pedal feel upgrade the master cylinder, the fluid, and the pads. My car with a cage and ballast weighed about the same as a stock E30, again hard to fade the stock brakes.

I do understand personalizing the car with wheels and other non functional bits like wings,splitters....But quite often with a BBK there are negative effects like lock up. After you get the lock up you start chasing a fix for the lock up like bias valves, one bad lock up and your tires are toast. it is a never ending cycle.

[einstein57]

What I mean by not being a track car is that it will never have a cage or fender flares etc. I do plan on taking it to the track and removing everything I can from the car for those weekends. But when its in daily driver mode it will have vaders and m3 back seat. Having a big knob sticking out of the console seems out of place on a full interior. Although I might consider mounting under the console so I can adjust it when the car is in track trim (sparco sprints, harness; fiberglass bumpers and hood).

[briansjacobs]

What I mean by not being a track car is that it will never have a cage or fender flares etc. I do plan on taking it to the track and removing everything I can from the car for those weekends. But when its in daily driver mode it will have vaders and m3 back seat. Having a big knob sticking out of the console seems out of place on a full interior. Although I might consider mounting under the console so I can adjust it when the car is in track trim (sparco sprints, harness; fiberglass bumpers and hood).

wow, that seems like alot of prep to go to the track.

[erik325i]

It will be a lot of work to mount it in the cabin while keeping it clean with a full interior. It makes sense to do this on a gutted track car where it doesn't matter if you have lines running through the cabin. Here is a picture of a bias valve mounted in the engine bay as I described earlier:
Picture found in one of 2002maniac's threads