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Brake proportioning valve

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srercrcr
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Brake proportioning valve

Postby srercrcr on Wed Jul 30, 2008 4:04 am

I think mine is defective cause I'm not getting any pressure to the front calipers, just the rear. I wouldn't be opposed to defeating the separate front to rear systems...like in the good old days. Why couldn't I replace it with a simple junction block, all lines merging at that spot? Anybody seen such a block offered in the aftermarket?
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78 Grand Prix LJ - one owner
I sell GM service manuals and some GP parts

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pontiacgp
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Postby pontiacgp on Wed Jul 30, 2008 8:37 am

your rear brakes will locking up every time you hit the brakes if you aren't using a proportioning valve...

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85 Cutlass Brougham
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Postby 85 Cutlass Brougham on Wed Jul 30, 2008 10:37 am

Plus, the prop valve also contains a residual pressure valve to keep the rear brakes in adjustment. If you remove this, the wheel cylinders will retract too far and the back brakes will fail to function.
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1985 Cutlass Supreme Brougham (ex pizza delivery beater with 240,000 miles):
355 Chevy- 9.5:1 compression, Comp XE 262 cam, World S/R Torquer heads with 2.02's, Edelbrock Performer, 800CFM Q jet, Camaro ram air system,Edelbrock headers, Comp Magnum roller tip rockers,TH 200 4R, 3.23 rear, aluminum hood, IROC steering box, poly bushings, Eibach springs, etc. Cutlass build thread here: viewtopic.php?t=4982
Also: The Thing That Won't Die-1998 Nissan Frontier, 340,000 miles of pizza delivery.


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