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Proportioning Valve question

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Old Dec 6, 2011 | 08:08 PM
  #1  
krzyz's Avatar
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From: winnipeg canada
Car: 1982 z28
Engine: 383
Transmission: 4l60e
Axle/Gears: 3.73 posi
Proportioning Valve question

so i got a job working at a salvage yard for the winter and be collecting some parts for my camaro. i picked up 3 sets of electric fans from a 2004 buick to fit the camaro, but thats not what im getting at, i have been goin through the gm section at work and we have a few astro van that have rear disc brake on them and a whole bunch of gm trucks with rear disc brake i have grabbed 1 propor valve from and astro van and a chev tahoe. i know the tube nuts will be differnt size which isnt a big deal im just wondering if this will work with my ls1 brake swap? i dont see why it wont cause both vechiles have rear disc brakes. just wanna hear some input.

thanks
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Old Dec 7, 2011 | 06:41 AM
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Proportioning Valve question

Originally Posted by krzyz
...i have grabbed 1 propor valve from and astro van and a chev tahoe. i know the tube nuts will be differnt size which isnt a big deal im just wondering if this will work with my ls1 brake swap? i dont see why it wont cause both vechiles have rear disc brakes.
Your 82's combination valve will have SAE threads, later F-bodies (around 84+) had metric. What the Astro and Tahoe are equipped with, I have no idea.

The valves change with braking options: disc/drum, disc/disc (iron Delco-Moraine calipers and 10.5" rotors), and disc/1LE (alum PBR calipers and 11.7" rotors). For best brake performance then, the correct valve is needed. For the LS1 swap, most use the 1LE combination valve, but of course it's metric and won't fit your application. Best bet may be an adjustable valve.

JamesC
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