Sensitised Vacuum Booster

[the hamiltons]

Does increasing the pedal sensitivity actually increase brake line
pressure and give improved braking or only require less pedal effort? If
there is an increase in line pressure, does anyone know what it is? That
would help in a comparison with Powermaster. What is done to a booster to
make it more sensitive? I assume the modifications are strong enough to be
safe using the original equipment booster.

Is a larger master cylinder suggested with the modified booster?

Al Hamilton
Kingston, Ont

hamilton

 

[thomas g. warner]

Al I am going tomorrow to try and pick up some power boosters at the local
junk yards. Called them Friday and several say they have them on various
1986 GM full size station wagons. Talked to Ed Daniels and he verified that
they are all OK. Am going to try and get they as cheap as possible. I like
the idea of the powermaster for two reasons, no longer have to rely on the
vacuum for brakes, adn greatly increased line pressure. Would you be
interested in one (assuming that I get any. Ed says he will do the
rebuilding for members of the club.

As to the question of the sensitized booster, I have not been able to find
any info on it locally yet. Even if we use it we still have to contend on
the loss of engine and thus brakes.

> Does increasing the pedal sensitivity actually increase brake line
>pressure and give improved braking or only require less pedal effort? If
>there is an increase in line pressure, does anyone know what it is? That
>would help in a comparison with Powermaster. What is done to a booster to
>make it more sensitive? I assume the modifications are strong enough to be
>safe using the original equipment booster.
>
> Is a larger master cylinder suggested with the modified booster?
>
> Al Hamilton
> Kingston, Ont
>
>hamilton
>
>
>

 

[jim bounds1]

Al,
Instead of trying to answer your question with what I know about the
system, I would encourage you to call Leigh Harrison who, I'm sure, will
be able to discuss with you in depth his booster system. His phone #
is: 1-703-494-9914 and FAX 1-703-490-0902. Anyone else with similar
questions should also give Leigh a ring, be sure to tell him we were
talking and that you got his number from the GMCnet and our
conversations.

Jim Bounds www.gmccoop.com

>
> Does increasing the pedal sensitivity actually increase brake line
> pressure and give improved braking or only require less pedal effort? If
> there is an increase in line pressure, does anyone know what it is? That
> would help in a comparison with Powermaster. What is done to a booster to
> make it more sensitive? I assume the modifications are strong enough to be
> safe using the original equipment booster.
>
> Is a larger master cylinder suggested with the modified booster?
>
> Al Hamilton
> Kingston, Ont
>
> hamilton