[DeTomaso] Brake question

[Dave Londry]

Wish I'd tried locking it up when I was driving it, Rob.
During normal stops it felt very much stock.
BTW - Did you get the shifter trunnion replaced?
dave

On 12/05/2012 10:44 AM, Rob Dumoulin wrote:
> When i got the car it would not hold pressure and there was no parking
> brake cable. The shuttle valve was cracked. I removed it totally and
> replaced the massive proportioning monstrosity with a modern adjustable
> one. I also added two pressure gauges up front thinking i might meed to
> fine tune the bias. I never did get it to lock up and leave it wide open.
> Girling calipers are stock.
> On May 12, 2012 1:18 PM,<MikeLDrew at aol.com>  wrote:
>
>> In a message dated 5/12/12 9 46 16, guson at home.se writes:
>>
>>
>> Removing the shuttle valve will not affect brake performance at all, right?
>> The prop valve is different.
>>
>>
>> Ah, my mistake--I was confusing the two!
>>
>> Removing the shuttle valve will not affect brake performance as long as
>> the system is replumbed so that the front and rear systems are separate and
>> independent, and so long as the stock front pressure reduction valve
>> remains in place.
>>
>> If the shuttle valve block is kept in place and simply is gutted by
>> removing the internals, then you have really screwed up your brakes,
>> because now the front and rear systems are connected.  Any differential
>> pressure created by the reduction valve will be offset by the fact that the
>> systems are connected downstream.  The result would be excessive front
>> braking/reduced rear braking (same as if you removed the pressure reduction
>> valve), and also an elimination of any safety because now a failure in one
>> circuit will affect the other one.
>>
>> If the systems are mixed this way, then a dragging brake caliper that
>> heats up the fluid, would eventually heat the fluid to the other three
>> calipers.  Doom.
>>
>> Rob--tell us exactly what you've got going on plumbing-wise?
>>
>> Mike
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