RESIDUAL PRESSURE VALVES

Make sure you have not installed them backwards. Like you said the main reason is for MC which are mounted low. I have also used them in a non boosted system where bore was minimized and stroke was maximized for brake force. In this system the residual pressure valves kept just a little less on my stroke which gave me a just a little more available stroke if you will.

If you have adequate booster and are not using the entire stroke my vote is you probably don't need them.

Thanks

Did you get your system from Quella?

2511 has Wilwood calipers, aftermarket MC and the two blue RPV's.

I asked Dennis about this years back. He told me he uses them for a reason, but not the height issue.

He said the Wilwood piston seal o-rings are not really o rings, but quad rings - flat on all four sides. He feels they tend to pull the pistons back into their bores more than a true round o-ring. So, to counteract that piston recession, which would result in a somewhat further piston travel, (and thus slower), before full stopping power, he adds the RPV's to hold the pistons closer to the rotor.

I still have them in, and bleeding the brakes doesn't seem to suffer due to their presence.

Larry

Having them in won't hurt anything. With a MC NOT down low (like the hot rods who put them under the floor board). It is essentially doing what the system is doing already so you will likely see little difference with or without.

Thanks for all the input guys.