Markus,
I'm installing 80mm calipers tomorrow for just the effects you list. I hope
it increases the pressure on the front pads. I think I have plenty of room
for more pedal travel. After 14 years of driving this machine I have found
that every time I have an emergency stop the front braking is not adequate
but the rears will lock up at slow speeds. I've done all the maintenance
and put larger cylinders on the rears. They all helped but I probably won't
be happy until I can lock up the fronts at low speed as well. I'll report
on my perceived effect.
Bob McLaughlin
- -----Original Message-----
From: owner-gmcmotorhome
[mailto
wner-gmcmotorhome]On Behalf Of Stammon
Sent: Tuesday, May 02, 2000 9:46 AM
To: gmcmotorhome
Subject: Re: GMC: GMC Motorhome Digest V3 #475
In a message dated 5/2/00 9:01:41 AM US Eastern Standard Time,
>
Gary;
I've gotten tons of good advice, but somehow gotten away from the point
of my original question.
All I was saying is that the power assist allows less pedal travel by
allowing the use of a bigger master cylinder. The size relationship between
the master and slave cylinders is like a lever, and if you want to multiply
force, you have a small diameter master cylinder with long travel and a
short
travel large diameter slave cylinder. Or you can use a power booster and a
larger diameter master cylinder (with short travel) to the same effect.
The whole point of my original question was to try and find out why
people were going to an 80 mm caliper. By doing so they will increase the
pressure to the front pads, but at the expense of pedal travel and the ratio
of pressures between the front and rear brakes allocated by the
proportioning
valve. Having no experience with this conversion, and VERY interested in
safe
brakes, I want to hear what everyone's experiences are.
Markus
I'm installing 80mm calipers tomorrow for just the effects you list. I hope
it increases the pressure on the front pads. I think I have plenty of room
for more pedal travel. After 14 years of driving this machine I have found
that every time I have an emergency stop the front braking is not adequate
but the rears will lock up at slow speeds. I've done all the maintenance
and put larger cylinders on the rears. They all helped but I probably won't
be happy until I can lock up the fronts at low speed as well. I'll report
on my perceived effect.
Bob McLaughlin
- -----Original Message-----
From: owner-gmcmotorhome
[mailto
wner-gmcmotorhome]On Behalf Of StammonSent: Tuesday, May 02, 2000 9:46 AM
To: gmcmotorhome
Subject: Re: GMC: GMC Motorhome Digest V3 #475
In a message dated 5/2/00 9:01:41 AM US Eastern Standard Time,
>
Gary;
I've gotten tons of good advice, but somehow gotten away from the point
of my original question.
All I was saying is that the power assist allows less pedal travel by
allowing the use of a bigger master cylinder. The size relationship between
the master and slave cylinders is like a lever, and if you want to multiply
force, you have a small diameter master cylinder with long travel and a
short
travel large diameter slave cylinder. Or you can use a power booster and a
larger diameter master cylinder (with short travel) to the same effect.
The whole point of my original question was to try and find out why
people were going to an 80 mm caliper. By doing so they will increase the
pressure to the front pads, but at the expense of pedal travel and the ratio
of pressures between the front and rear brakes allocated by the
proportioning
valve. Having no experience with this conversion, and VERY interested in
safe
brakes, I want to hear what everyone's experiences are.
Markus
