82-92 F body brake help

[Eman]

Originally Posted by MYLINRACING

I have a 86 trans-am and it has a Ed Quay master cylinder and pedal setup. I have Aerospace disc on the front and drum brakes on the rear, also have a 10 pound residual valve on the rear drums. I can not get the car to hold above 2200 rpms without it creeping in the lights I want to get it to at least 3000 rpms. Any suggestion on what to try next?

thanks

You either have an incredibly tight converter or a brake problem.
My 3rd gen has a Chrysler MC, 1.032 bore with a factory pedal modified to 6:1 pedal ratio by raising the rod attachment point. Factory disc on the frt. and Ford drums on the back and all stainless flex lines. I have held at 4k on the starting line with no problems. Drum brakes will hold a car better than disc as they are self energizing. That is why emergency brakes work better in fwd than reverse.
Use basic hydraulics to determine your problem. To increase rear brake application use the largest bore wheel cyls you can find for your brakes. I use 2 sets of shoes and only install the long secondary shoes in both positions, more surface area. No need for residual ck valves if the MC is on the firewall. Should be no need for a prop valve and if you do install one use an adjustable one in the frt. line to stop frt. brake lockup at the stripe.