RE: Disc brakes.

[William Cole <wedge64@xxxxxxxxxxx>]

I do have the dual resevior MP. Just not sure what car it was for.

Bill
On Fri, 13 Apr 2007 13:23:13 +0000, "Kevin Merkley"
<krmerkley@xxxxxxxxx> said:
> 
> Hi Bill,
> 
> When I did my brake swap I made sure that I bought the master cylinder 
> for a 74 Dart with manual brakes (discs in front).  If they gave you a 
> master cylinder from a drum/drum car, you may end up with the symptoms 
> you are experiencing.
> 
> I have manual brakes on my 64 440 and they work fine.  All my brakes 
> were from a 74 Dart and i used the prop valve from the 74 Dart.  My 
> calipars are on the front as they were on the Dart.
> 
> Regards,
> 
> K.
> 
> William Cole wrote:
> > 
> > Menko,
> > I've never locked up the brakes at all, never had to. I have had to stop
> > quickly a couple of times but never had anything lock up. I'm sure the
> > front brakes are working like they're supposed to. I have a line lock
> > and if I engage it, it will hold the car and let me spin the back tires.
> > I don't have an adjustable prop. valve. Just one of the regular ones.
> > And if I hold the brakes, you can't turn the rear tires at all, so, I
> > assume the system is bled correctly and all 4 are working like they
> > should.
> > I don't know what the piston size is on the MP I have and I'm pretty
> > sure the MP I got was from a car that wouldn't have had disc on the
> > back.
> > The rotors I have are for the 73-76 A body cars.
> > Thanks for all the input guys!
> > 
> > Bill
> > PS: Menko,the computer is working just perfect yet.
> > On Thu, 12 Apr 2007 09:26:51 -0700, "Menko" <menkoj@xxxxxxxxx> said:
> > > Ok, here's my .02 worth on figuring out your brake issue.  There are 2
> > > separate issues from what I have heard: difficult pedal action, and
> > > poor stopping ability.  That could indicate multiple problems, and
> > > since you bled them very well, we should look at other things.
> > > 
> > > Besides being difficult to stop, what happens when you lock up the
> > > brakes?  Do the fronts lock first for the rears?  If the rears are
> > > locking, its possible your front discs are not engaging fully,
> > > preventing full braking power.  You would need to check adjustment on
> > > your prop valve, to lessen the amount being sent to the rear.
> > > 
> > > Something else stuck in my head--you used a master cylinder from a
> > > disc/disc car.  Unless you put a residual pressure valve on the rear
> > > drums, or replaced the rear wheel cylinders with modern ones, the rear
> > > drums are not getting the residual pressure they need for energizing.
> > > 
> > > Master Cylinder: the bore size people are talking about is really an
> > > issue.  later model cars have 15/16" bore master cylinders for power
> > > brakes that allow the pedal to travel further which would let you
> > > modulate it more.  The same amount of pressure if required, but you
> > > have more travel to apply it in.  Conversely, some of the manual brake
> > > master cylinders for E body cars or the aluminum MP master cylinder
> > > can be as large as 1 1/16.  Unless you are running 13" or larger
> > > rotors, this would probably be more pressure than most people want.
> > > 
> > > That's where I would start looking, hope it helps Bill!
> > > 
> > > MJ
> > -- 
> >   William Cole
> >   wedge64@xxxxxxxxxxx
> > 
> > -- 
> > http://www.fastmail.fm - Access all of your messages and folders
> >                           wherever you are
> > 
> 
> 
> 
> Kevin R. Merkley
> Thunder Bay, Ontario
> 64 Dodge 440 2dr HT (Cdn)
> 
> 
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-- 
  William Cole
  wedge64@xxxxxxxxxxx

-- 
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Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.