Join Date: Nov 1999
Location: Central California, USA
Re: Prop Valve frustration - help needed
You need a proportioning valve for Disc/Disc. What you have looks like a "Combination" valve, which has a proportioning valve, a metering valve, and a brake warning light switch all in one. It gets the job done, but lacks adjustablilty so you need to use factory front and rear brakes that go with that valve setting.
On high performance systems that we autocross and use aftermarket disc/disc combinations, we use just an adjustable proportioning valve in the rear line, and no brake warning light or metering valve. If I wanted a brake warning light, I'd use a drum/drum warning light switch plumbed to the master cyl, and install the prop valve after the switch in the rear line. I've put one before the switch and it worked, but there's a chance it would trigger the warning light that way.
Check my web page for First Gen Camaro suspension info:
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67 RS 327 original owner. 1965 Lola T-70
Last edited by davidpozzi; Dec 8th, 17 at 04:54 PM.