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Old July 19th, 2013, 04:38 PM   #6
yyj87
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Join Date: 04-10-10
Location: Traverse city(Silver Lake)
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How I understand this situation: (I could be wrong)

Drums require less pressure to operate, a factory prop valve regulates pressure to the rear. So when swapping discs on they will still see pressure and work but work better when pressure to both front and back are equal.

I run an open block.
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