[DeTomaso] Pantera - Brakes - Proportioning Valve

Kirby Schrader kirby.schrader at gmail.com
Fri Dec 9 11:04:29 EST 2011


Just to mention....

Some people have their cars set up without the booster and do NOT use
a vacuum assist with their brakes.

But life with vacuum assist is certainly easier...
Depends on your right leg...

:-)

Personally, I have the booster on the Pantera.


On Fri, Dec 9, 2011 at 09:59,  <MikeLDrew at aol.com> wrote:
>
> In a message dated 12/9/11 7 50 6, rickrows at hotmail.com writes:
>
>
>> What about the proportioning valve?    Remove, gut, leave as is?
>>
>
> Leave as-is.   Gutting or removing it will unbalance your braking system,
> making the front brakes overly sensitive.   For gentle driving it feels like
> an improvement, because the car stops with less pedal effort.   But if you
> seriously need to stop, now your front brakes lock prematurely and your rear
> brakes (which do a higher-than-normal amount of the car's overall braking
> due to the rearward weight bias) do little at all.
>
> Nobody else has mentioned that your power brake booster could be shot (or
> not getting proper vacuum).   The Pantera relies on power assist for proper
> braking; if that part of the system takes a dump, your leg doesn't have
> enough mechanical advantage to let the stock master cylinder lock the calipers.
>
> It's difficult to pinpoint the source of your problem from a distance, and
> it's annoying to spend money replacing a component, only to learn that it
> wasn't the offending one. :<(
>
> Mike
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