Combo valve or manual prop and resiual valves?

[skip99]

I installed a 4 wheel disc setup on 51 truck, i have a new combo valve that i need to swap for a disc disc, but my question is , should i use the brass combo valve?( it looks ok and has a bracket to mount under mc, looks stock) or should i get 2 2lb residual valves and a prop valve for the rear, ?

Update, when i look at the wilwood adjustable prop valve, just about everything i read says no residual valves needed if mc is on fire wall,

[The Rocknrod]

Originally Posted by skip99

I installed a 4 wheel disc setup on 51 truck, i have a new combo valve that i need to swap for a disc disc, but my question is , should i use the brass combo valve?( it looks ok and has a bracket to mount under mc, looks stock) or should i get 2 2lb residual valves and a prop valve for the rear, ?

Where is your master cylinder mounted?

[skip99]

Originally Posted by The Rocknrod

Where is your master cylinder mounted?

Firewall

[mongocanfly]

is your master cyl for disc/disc or disc /drum?...ive seen where some people have issues , and a disc/drum master may not have enough fluid to operate the rear disc brakes properly after you swap from drum to disc

[skip99]

Originally Posted by mongocanfly

is your master cyl for disc/disc or disc /drum?...ive seen where some people have issues , and a disc/drum master may not have enough fluid to operate the rear disc brakes properly after you swap from drum to disc

One side is bigger, but i dont think that matters, you can literally pump the brakes 20-30 times before it would drain either side...

[mongocanfly]

its not reservoir size that the issue..its the amount of fluid movement due to piston size that causes some people problems
you may not have any issues though

[LS short box]

I've done a number of disc/disc swaps with the master cylinder on the fire wall. Mostly using C5 Corvette calipers and rotors front and back. I always use the Wilwood adjustable prop valve in the rear. After a few brake stops to adjust I haven't touch them since. Never used a residual valve in any of the projects.

[The Rocknrod]

Originally Posted by LS short box

I've done a number of disc/disc swaps with the master cylinder on the fire wall. Mostly using C5 Corvette calipers and rotors front and back. I always use the Wilwood adjustable prop valve in the rear. After a few brake stops to adjust I haven't touch them since. Never used a residual valve in any of the projects.

Same here.