Author Topic: Kelsey Hayes adjustable proportioning valve  (Read 8911 times)

Jon Mello

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Kelsey Hayes adjustable proportioning valve
« on: September 13, 2015, 04:54:25 AM »
Here is an ebay auction for an NOS proportioning valve used by many of the Trans-Am teams back in the day.

http://www.ebay.com/itm/1965-69-Corvette-Heavy-Duty-Brake-Proportioning-Valve-/111614441141?hash=item19fcbd36b5

The asking price is probably higher than I have ever seen but the pictures from the ad are at least useful to give an idea of the original finishes. I have seen these valves located under the hood in the familiar location under the master cylinder and in other cases I have seen them mounted in the interior of the car.







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BULLITT65

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #1 on: September 13, 2015, 03:26:51 PM »
Looks like the same one used for 65 and 66 mustangs with disc brakes.
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Jon Mello

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #2 on: September 13, 2015, 04:11:38 PM »
Used on Lincolns and Thunderbirds from that era too, from what I've been told.

Good item to remove when/if you see those cars in a junkyard.
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69Z28-RS

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #3 on: September 13, 2015, 04:26:59 PM »
Jon,

I'm curious... based on your statement that these valves are sometimes located in the driver's compartment...  I am assuming that is to allow 'during race' adjustment of front-rear brake bias based on changing conditions with weight bias?...  if so, wouldn't something like the following be more easily used by a driver?

http://www.ebay.com/itm/Universal-Adjustable-Proportioning-Valve-Rotary-Adjustment-Front-to-Rear-Bias-/290849949712?hash=item43b8020810&vxp=mtr

I'm assuming that I'm missing something here that you can/will fill me in on... :)

PS.  I do understand theperiod  'Trans Am' restoration aspects of the part you referenced... if that is the only advantage of that $1200 part...  :)
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janobyte

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #4 on: September 13, 2015, 04:33:05 PM »
Just chiming in, should be into an online class right now, I believe the style listed on Ebay was not available until years later. We run a Wilwood in the Anglia.
68 Z/28  born with: 302, drive line, etc..

BULLITT65

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #5 on: September 13, 2015, 06:08:33 PM »
Just chiming in, should be into an online class right now, I believe the style listed on Ebay was not available until years later. We run a Wilwood in the Anglia.
You are referring to the one Gary posted as being available years later right?
1969 garnet red Z/28 46k mile unrestored X77
-Looking for 3192477 (front) spiral shocks 3192851 (rear)
-Looking for an original LOF soft ray windshield
-Looking for original Delco side post negative battery cable part # 6297651AV

janobyte

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #6 on: September 13, 2015, 08:16:59 PM »
Just chiming in, should be into an online class right now, I believe the style listed on Ebay was not available until years later. We run a Wilwood in the Anglia.
You are referring to the one Gary posted as being available years later right?
correct
68 Z/28  born with: 302, drive line, etc..

Jon Mello

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #7 on: September 14, 2015, 02:58:25 AM »
Jon,

I'm curious... based on your statement that these valves are sometimes located in the driver's compartment...  I am assuming that is to allow 'during race' adjustment of front-rear brake bias based on changing conditions with weight bias?...  if so, wouldn't something like the following be more easily used by a driver?

Gary, that newer valve would seem to be more easily used but it is not an authentic "period correct" piece. I think the only reason to put a brake valve in the interior of the car would be to allow the driver to make some kind of adjustment "on the fly".
Jon Mello
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69Z28-RS

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #8 on: September 14, 2015, 03:10:24 AM »
Thanks Jon,   those were the only reasons I could understand, but didn't know if there was something *special* about the HD nature of that valve...
09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette, '60 Corvette, '72 Corvette
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

Jon Mello

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #9 on: September 15, 2015, 12:18:09 AM »
Not anything further that I know about, Gary.
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satman

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #10 on: September 15, 2015, 01:17:47 AM »
Why would anybody in their right mind pay $1200. US for a proportioning valve  when a $30. part would do the same job ......... Obviously if someone buys this item he should immediately consider joining Jay Leno's more money than brains club.
http://www.ebay.com/itm/GM-factory-Brake-Adjustable-proportioning-Valve-Universal-/281794685711?hash=item419c45ab0f&vxp=mtr

AL Richards

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Jon Mello

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Re: Kelsey Hayes adjustable proportioning valve
« Reply #11 on: September 15, 2015, 03:17:38 AM »
Al, I can't see anybody paying that price but the guy's entitled to ask whatever he wants.
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