What is this thing with the **** and the brake lines? Better yet, what does it do if I turn the ****?

 

it looks to be a brake proportioning valve

 

it appears next to and/or part of the a/c unit. a makeshift recharger? i say that 'cause it looks like a contraption i used to attach to the lines in a home unit to add freon to the unit.

ummm....brake proportioning valve sounds good too.....whatever that is

 

It's a brake proportioning valve. It's needed when a rear disc conversion is done. It adjusts the brake bias front to rear. Turn the **** one way it puts more front brake in. Turn it the other way and you get more rear brake.

 

Cool! So....most of us would just turn it to the "no brake" setting

 

And I third this.

Have you got rear discs on that thing?

 

Yep... and thanks for the comments. I had hoped that is was for a hidden turbo or something.

 

To verify the adjustment, find a safe place to get to speed and slam on the brakes. The fronts should lock up just before the backs lock up. If the backs lock up first, it could send you spinning.

Here's the wierd part: to delay braking to the rear brakes, you turn the proportioning valve counterclockwise.