Re: [Amc-list] 1970 brake specs?

[Archimedes <Freedom@xxxxxxxx>]

At 05:48 PM 2/23/2007 -0800, you wrote:

> > I always thought it was an attempt to do the "metering" through the
> > resevoir and piston sizes in the MC.
>
>Ohh, that could be tricky -- so there could be an early vs. late
>master cylinder?
>
>I've got a bunch of TSMs coming, and I might beg a few pages of data
>from listers for years I can't get. But let me get it all together
>first.


I have a complete set.  What do you want?

For that matter, I have some extras for sale:

http://richmondrambler.tripod.com/literature.html

By the way, a lot of the diddling with the brakes was driven by trying to 
comply with (unfunded) federal mandates.  The feds began issuing 
regulations on brakes (and quite a few other things) beginning in 
1970.  The regs often carried specs that changed every year (which I am 
certain really frazzled the engineers).

Some specified lock-up tendencies, there was one specifying brake area 
based on type of brake and weight of vehicle, another that brakes had to 
operate to a certain spec under the car's maximum load, etc.

Many of them made little sense.

For instance, any moron can tell you that a brake system tuned to stop the 
car efficiently under full rated load (four people, the family dog, and two 
hundred pounds of luggage plus the beer cooler) is going to be a lot less 
efficient under normal load (one driver going to work every day).  It was 
for this reason that almost all cars (especially smaller ones) in the late 
seventies and early eighties had serious problems with severe rear-wheel 
lockup.

-- Marc


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