Re: [Chrysler300] Disc Brake Conversion for 300G

[dan300f@xxxxxxx]

Hi all again:
 
I too wondered why I should have a proportioning valve on my '66 300.   
What woke me up was back about 20 years ago on my way to a 300 Club meet north  
of Seattle, I was crossing the bridge over the Columbia River in Portland.  
 I was cruising along when all of a sudden I had no brakes but the 
emergency  brake.  I put it to good use and quickly got off the freeway at the next  
exit.  Problem was that I had made an adjustment to the push rod in Grants  
Pass and it caused the fluid to back up into the master, taking fluid out 
of the  lines to the brakes.
 
You can fast forward with this story with a scenario where one of the brake 
 lines fails for some reason.  The result will be the same ... no  brakes.  
If you have ever tried to put the binders on with an open  cylinder, your 
foot will hit the floor.
 
But, with a proportioning valve and a dual master cylinder, you have 2  
separate circuits.  One for the front wheels and one for the rears.   With a 
proportioning valve, the rears contact first and then are followed by the  
fronts which do the majority of work to stop the vehicle.  This helps to  keep 
the car from swapping ends.  Unless you have a major catastrophy  wherein 
the master is wiped out, you have either the fronts to stop with or the  
rears.  So, your odds of stopping and avoiding a collision are  doubled.
 
I am very happy I put a dual master cylinder and a proportioning valve on  
my '66 300 vert. and my F.
 
Dan Reitz
Northridge, CA
 
 
In a message dated 10/12/2010 7:39:58 P.M. Pacific Daylight Time,  
MRS954@xxxxxxx writes:


Bob,
No, I didn't install a proportioning valve, other than  the stock block. 
But I do know that I can lock up all 4 wheels (Bambi made me  do it). I didn't 
see a need for a valve. All my former brake issues have been  solved since 
I installed the AAJ set.
After about 3 or 4 slow-downs or  stops, the original brakes faded 
severely. After driving for some time, when I  hit the hooks to stop for a traffic 
signal or stop sign, the car would veer  off to one side or the other, never 
consistent. Each time I hit the brakes it  was a new and exciting adventure. 
It got to the point where I hated to drive  it, and I was ready to sell it. 
I took the car to my favorite shop where they  turned the drums (again) and 
trued up the shoes to match the drums. Everything  was new, from the master 
cylinder to the wheel cylinders, including hoses,  stainless lines, 
everything. After the conversion, the car is fun to drive  again.

Mark






-----Original  Message-----
From: Bob Jasinski <rpjasin@xxxxxxxxxxx>
To:  Chrysler300@xxxxxxxxxxxxxxx
Sent: Tue, Oct 12, 2010 12:11 pm
Subject:  RE: [Chrysler300] Disc Brake Conversion for 300G


Mark,

Did  you install a proportioning valve, and if so what type and where did  
you
nstall it?  If you didn't, have you checked to see if your rear  wheels and
ront wheels lock up at the same time?  AAJ suggests  stopping on a gravel
oad and adjusting the proportioning valve until the  wheels lock up the
ame.  Dan Reitz writes that the '66 300 with disc  brakes had a single pot
aster and no proportioning valve from the factory,  so are they really
eeded?

Bob J

From:  Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
ehalf  Of Mark Souders
ent: Tuesday, October 12, 2010 7:32 AM
o:  tc440@xxxxxxxxxxx; Chrysler300@xxxxxxxxxxxxxxx
c:  BEhrmann@xxxxxxxxxxxxx
ubject: Re: [Chrysler300] Disc Brake Conversion for  300G



ick,
used the basic kit from AAJ Brakes. After a  few years of fighting brake
ade and not knowing if or how my 300H would  stop, I converted to front
iscs. I did not change the master cylinder, I  wanted to have the engine bay
ook original. I did the conversion about 6  years ago, and I have no
egrets. My brakes work fine now with no sudden  surprises when applying the
rakes. The AAJ basic kit comes with detailed  instructions and a list of
tems that must be purchased locally. AAJ does  supply a complete kit but the
reight charge to ship it across the country  was more that a few tanks of
as to drive to my local NAPA store. I lost a  little sleep knowing the
alipers were for a 76 Monte Carlo, but after my  first drive with the new
etup, I slept like a baby.
Good luck with your  project.
Regards,
ark Souders
00H
ohrsville, PA
-----Original  Message-----
rom: Rick Ehrmann <tc440@xxxxxxxxxxx  <mailto:tc440%40verizon.net> >
o: Chrysler300@xxxxxxxxxxxxxxx  <mailto:Chrysler300%40yahoogroups.com> 
c: Bruce Ehrmann  <BEhrmann@xxxxxxxxxxxxx <mailto:BEhrmann%40stribling.com>

ent:  Mon, Oct 11, 2010 10:21 pm
ubject: [Chrysler300] Disc Brake Conversion for  300G
Hello friends - After a few years of sitting in a garage, my brother  
Bruce's

s been revived. She's running fine, but after much brake work  over the
ears, 
've decided to convert to front disc brakes and a dual  master cylinder. I
now 
me of you have already done this conversion.  What has your experience been?
hat parts or conversion kit did you use?  Thanks for any insight on this you
an 
fer.
ick Ehrmann
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