Tom:

After reading the FSM yesterday I understand "more" of how the 70-72 P valve operates in the system, but I do not believe it's a great system. The 73 -78 system makes a lot more sense to me.

BTW, I did acknowledge (see prior post) that I was wrong. No need to humor me, if you know something someone else doesn't know, please post as you did. If they question the validity don't hesitate to post references to back yourself up. Ya can't expect people to blindly believe everything posted in an internet forum.

yeah walt after i was told that i couldne get the part anymore i went to numerous pick-n-pulls and started taking them off any z that had one. I managed to get a few that were in perfect working order and my brakes work again. if i can find what i did with some of the other working ones i could mail you one if you need it they were really cheap like 5 bucks a piece but i wont charge you. well just shipping maybe if you want one and i can find em in my piles of junk in the garage . anyway just wanted to let you know.

280zgod

Did replacing the stock PV in your Z improve brake performance?

Thanks

Miles

Here's a pic of my '70 before disassembly. The "valve" on the right goes back up to the front of the car, and feeds the "valve" on the left, which splits to the two back brakes.

FWIW.

Mark

well Miles, i actually had the entire system replaced not just the valves. I got new rotors calipers pads shoes wheel cylinders pv's and a master cylinder. My brakes have improved drastically. In the year that I've owned the car it has never stopped so well and so fast and smooth. But i would have to say that the pv made the most difference because my old one was so bad that my back brakes didnt even work at all i was stopping with one front disc for about a month. But yeah pvs help. If you dont get a new one just replace the seals to it and clean it out and it will work ten times better at least thats how it was for mine. hope that helps Miles. Late.