Re: IML: AAJ vs stock brakes for 1957
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Re: IML: AAJ vs stock brakes for 1957



Someone mentioned Rolls-Royce in an earlier post and I remember reading an article stating that the reason Rolls stayed with drums for so long is that it took some time before they came up with a disk system that was reliably silent  when the brakes were applied.
 
Jim L. in OR
    '60 Crown 4dr Southampton
    '62 Crown 4dr Southampton
 
----- Original Message -----
From: John Corey
Sent: Sunday, December 09, 2007 4:20 PM
Subject: Re: IML: AAJ vs stock brakes for 1957

I have to agree with Kenyon - NEVER lick the brake dust from your wheels.  That said, well-maintained stock drum Imperial brakes work pretty darn well.  I can say that they even tolerate a fair level of hard use, judging from their performance in my 61 softtop (coast-to-coast road rally, 4,000 not-exactly-gentle miles in two weeks, summer of '06).  Given the modest mileage on yours, I'd say replace the rubber and ride!

Now here's a question - given the relative simplicity of disc brakes, how is it that the remarkably complicated drum brake systems ever became standard.  One argument is that they are self-energizing; a useful trait before reliable power boost; but that hardly explains why they lingered on for decades after power brakes were introduced.  That they stayed on cheaper models longer suggests they're cheaper to make, but just looking at the parts count and total mass of the two systems, that seems impossible.  Any ideas why discs didn't own the world earlier?

jc

On Dec 8, 2007, at 7:30 PM, Kenyon Wills wrote:

Everyone that has done the brake conversion seems
quite pleased with it, and AAJ seems to have the
solution at a fair enough price.

That said, I personally think that an awful lot of
unwarranted and negative noise has been made about the
stock brakes, and the pattern that I think I see is
one of people that try to apply common sense and past
experience on other brake systems to this one and then
have to acutally read some instructions, if they read
anything at all.  The other thing that seems to go on
is that people faced with clapped out, 40+ year old
brakes are facing replacement costs and then try to go
out and re-engineer their car WITHOUT ever bothering
to try a correctly functioning set of stock brakes,
presuming that they must be awful without confirming
that to be a fact.

In that situation, you're bound to hear reports about
how awful and difficult things were for a person,
especially if doing the conversion was subsequently
easier.  

On the other hand, if you read the MTSC booklet that
goes through the steps one at a time as posted on the
site, follow the instuctions, and expect the sort of
brakes that were available back then, well, I doubt
you'll be disappointed.

Note that Chrysler was never sued for having
inadequate brakes, there was never a recall, and aside
from the obvious differences between disc/drum, unless
you plan to do aggressive driving, the stock stuff
should be just fine.

One complaint I have is with the "organic" material
they use on brake shoes.  I heard someplace that it's
gound up peach pits or something.

I got a set of shoes and had "original" material put
on.  The kind that was involved in lawsuits awhile
back and starts with an A.  Well I told the kids up
the block not to lick the brakedust on my car wheels
and everything works better now that I'm using them.

So:  New shoes + inept installation = complaints, and
normally complaints travel around the world before
good results get their shoes tied.

I say stay stock if you plan to do anything aside from
gentle, responsible driving.



Good luck, and thank you for writing in.


-Kenyon

Hi Everyone,

I have been a member of this online club for many
years but in the last several years I have not
"spoken" via email at all.  I have been checking in
from time to time and always find interesting and
informative conversation going on.    What a
wonderful group of people Imperial owners are!!
I have recently sold cars leaving me with only my
'57 Imperial.   Now I am going to concentrate on it.
  Right now it needs some brake wheel cylinder work.
  I was wondering if anyone has done an AAJ
conversion on a '57 or similar pitting on disk
brakes and eliminating the factory front drums and
the factory master cylinder.  I want to convert the
system to a dual circuit master cylinder if I'm
going to do a conversion.     
The first question really is, however, with modest
driving, is it possible to get the factory brakes to
be reliable without constant fiddling and adjusting.
 I've heard stories of these "total contact" brakes
being very fussy, especially on Plymouths and Dodges
etc.   I won't need extreme brake response as I will
drive the car gently anyway.   My car is really in
excellent condition as it has only 25,000 original
miles and has been treated well all it's life.  The
biggest brake problem to date has been hydraulic
leaks at the wheel cylinders.  Some of the problem
surely has been due to non-use and that condition
will improve now.

Thanks,

Tim

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John Corey
CFIC-Qdrive, 302 Tenth St., Troy, NY 12180 USA
518-272-3565 x201
fax: -272-3582




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