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Old 12-21-2005, 02:36 PM
yesgo yesgo is offline
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I guess it is possible to increase the spring pressure by loosening the knob, but it seems overly complicated. I am not aware of any pressure sensative prop valves like that. Adjustable and non adjustables I know of are offshoots or knock offs of a Kelsey-Hayes design put in production in the mid sixties.

The spring has to put pressure on the piston. Increased spring pressure increases the knee point=increased line pressure.

There is a brass valve being sold as a proportioning valve which works the other way. You can find it at some hot rod vendors. It looks cool, but isn't really a brake proportioning valve. It's more like a faucet. It increases or decreases flow at all times. Not designed or recommended for brakes.
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