[coyled]

Don, thanks for the advise. Wilwood was not very helpful. Wilwood thinks that the g forces are causing the calipers to drain back to the master which is lower than the calipers. The reservoir is much higher on the firewall. The g force issue and the master location is why they think I need a residual pressure valve. Spidle flex because of small bearings was unheard of to wilwood. The csx spec racers have had the same issue with the exact same set up that I run. They have not seen a difference with the residual pressure valve. We did talk to AP racing and they think the knock back springs will solve the problem. I think I will try that first. Maybe I will try the pressure valve next. One thing I have learned is to do one thing at a time. That PBR single piston floating caliper I had in back does not look so bad now. Too bad is was about on fire at road america. Scott