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Proportion valve
#11
(02-16-2018, 10:13 PM)Mjordan Wrote:
(02-14-2018, 09:39 PM)Bentworker Wrote: What I did...

Personally I run an adjustable prop valve on everything I have that does not have ABS brakes.
[Image: 0_AFD6_E96_BCE0_46_E7_B061_70794334_F976.jpg]

What master cylinder are you using?

2000 Ford Mustang V6 without traction control.  It is 1" bore - only think that isn't ideal is that the ports are on the wrong side.  I have disks front and rear.
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#12
(02-16-2018, 10:19 PM)I\m planning to run the Mustang Steve setup for 04 cobra setup. Looks good  Bentworker Wrote:
(02-16-2018, 10:13 PM)Mjordan Wrote:
(02-14-2018, 09:39 PM)Bentworker Wrote: What I did...

Personally I run an adjustable prop valve on everything I have that does not have ABS brakes.
[Image: 0_AFD6_E96_BCE0_46_E7_B061_70794334_F976.jpg]

What master cylinder are you using?

2000 Ford Mustang V6 without traction control.  It is 1" bore - only think that isn't ideal is that the ports are on the wrong side.  I have disks front and rear.
  Reply
#13
I also have the V6 master cylinder with aftermarket proportioning valve like the Wilwood shown. With stock front discs & rear drums I have had to turn the prop valve all the way closed and depending on what tyres I have on the rear they still lock up first sometimes. Anyone got ideas on how to improve this?
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#14
(03-04-2018, 12:34 PM)Duncan Mach72 Wrote: I also have the V6 master cylinder with aftermarket proportioning valve like the Wilwood shown. With stock front discs & rear drums I have had to turn the prop valve all the way closed and depending on what tyres I have on the rear they still lock up first sometimes. Anyone got ideas on how to improve this?

Do you have the forward MC port plumbed to your rear brakes and the rear MC port plumbed to your front brakes?

Drum brakes are more efficient than disk brakes, you might have to swap your rear drums for disks if you want your MC / prop valve to work.
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#15
(03-04-2018, 12:34 PM)Duncan Mach72 Wrote: I also have the V6 master cylinder with aftermarket proportioning valve like the Wilwood shown. With stock front discs & rear drums I have had to turn the prop valve all the way closed and depending on what tyres I have on the rear they still lock up first sometimes. Anyone got ideas on how to improve this?

Have you made sure that there is not a residual pressure valve in the rear outlet port of the master cylinder? It is a spring loaded neoprene "piston" under the brass seat in the rear brake outlet of the master cylinder. If it is still there, the rear disc brakes will be preloaded at 10 PSI causing the rears to engage more quickly (or drag) than the fronts. Chuck
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