Kelsey Hayes adjustable proportioning valve

[Jon Mello]

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.

[BULLITT65]

Looks like the same one used for 65 and 66 mustangs with disc brakes.

[Jon Mello]

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.

[69Z28-RS]

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... 

[janobyte]

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.

[BULLITT65]

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?

[janobyte]

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

[Jon Mello]

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".

[69Z28-RS]

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...

[Jon Mello]

Not anything further that I know about, Gary.

[satman]

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

"speed cost money how fast would you like to go"

[Jon Mello]

Al, I can't see anybody paying that price but the guy's entitled to ask whatever he wants.