Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Why Change the Distribution Block?

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Old Nov 24, 2009 | 10:55 PM
  #1  
rmorrell's Avatar
rmorrell
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From: Tennessee
Default Why Change the Distribution Block?

OK, In my swap to the Granada disc brake setup, I plan to use a proportioning valve. I understand the need for upgrading to a disc M/C, but why change the distribution block?

Thanks,
Richard
Old Nov 25, 2009 | 12:20 AM
  #2  
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Starfury
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In a '67, there's no reason. An inline prop valve can be plumbed in without any problems.
Old Nov 25, 2009 | 05:51 AM
  #3  
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2+2GT
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Originally Posted by rmorrell
OK, In my swap to the Granada disc brake setup, I plan to use a proportioning valve. I understand the need for upgrading to a disc M/C, but why change the distribution block?

Thanks,
Richard
You don't, regardless of year, if you are using an in-line proportioning valve for the rear brakes.
Old Nov 25, 2009 | 06:46 AM
  #4  
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chockostang
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You can keep your Stock drum brake distribution block on there. As mentioned above, simply plumb in a adjustable proportioning valve in the REAR BRAKE line, not the front.

Proportioning valves have nothing to do with the front disc brake fluid travel.

A Distribution block has no magical powers, it distributes, as a splitter for your garden hoses will do to distribute water from one to two/three outlets.

65 66 has no brake light switch (one closed system for all 4 brakes), the 67 up Drum Brake Distribution block has a brake light switch in the middle, but still is a distribution block.

Dan

www.chockostangclassicmustang.com
Old Nov 25, 2009 | 09:18 AM
  #5  
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rmorrell
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From: Tennessee
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Thanks Guys!
BUT! Without the proportioning valve to adjust the brake bias, I would be sending to much pressure to the rear?
Is that right???

I was thinking, maybe the distribution block does some proportioning, but your saying "it only distributes."


Richard

Last edited by rmorrell; Nov 25, 2009 at 09:22 AM.
Old Nov 25, 2009 | 09:26 AM
  #6  
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Starfury
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From: Elk Grove, CA
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That's correct. Disc brakes require more pressure to operate than drums, so you have to restrict the pressure to the rears to prevent them from locking up prematurely.

And yes, the factory drum distribution block is just that - a distribution block. It does no metering or proportioning.
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