68 camaro proportioning valve (combination valve)HELP?

[72Z/28]

Originally Posted by GregWeld

Now -- here's the problem with buying a "one size fits all" proportioning valve...


Those valves are usually specific for a car - as it left the factory. Well ---- as it left the factory it had bias ply skinny tires.... Now days we have staggered tire sizes... with big fat ones out back and fat nice ones in front...and or we also have different rotors and calipers on than came from the factory.... so now the brake bias is all wrong for what we currently have on the car.

Thus -- most people around here (performance enthusiasts for lack of a better term) will put on an ADJUSTABLE PROPORTIONING VALVE -- which, obviously, can be adjusted so that the bias will be proper for the car it's installed in.

The last thing you want to have happen is for you to need to panic stop, god forbid it's wet out -- and you lock up your rear brakes and have the ass end swap with you. Thus the need for the proper ratio of front braking power to rear braking power AKA a brake proportioning valve.

Wilwood will be happy to sell one to you -- along with a mount (if you want to use theirs) and instructions... The proportioning valve ONLY goes to the rear brakes since they're the ones we're trying to tune to get them to match what we have up front - whatever those are and the grip we have there.




http://www.wilwood.com/TechTip/TechFaqs.aspx

Thanks Greg for the write up. Actually the Wilwood MC was installed by the previous owner and I don't have the bleeding kit. I guess I am going to order the plugs to bleed the MC on the car.

As for the new stock proportioning valve, does that mean that it will not work properly with the wilwood MC and calipers? I wonder if wilwood sells a valve that does not require any adjustments because the car will not be used for autocrossing or at a track.

One more point, I recently replaced the rear brake line from right stuff detailing. It is a 1/4" line, which is basically a stock replacement. However, wilwood recommends a 3/16" line.