Re: Brakes need pumped to work, why?

[MO <micher@xxxxxxxxxxxxxxx>]

 Dan, your research agrees with mine 100%  I had one heck of a time
finding a non power  1" bore  disc-drum  Master Cyl. . I had it
narrowed down to exact make year and modle, but no one had them ! I
have been looking for the box it came in to write it down in my Dode
pedigree book, but have not found it yet. Maybe buried somewhere in
all my slips of paper notes!  Penty of slightly larger bore MC but I
was hesitant to try it.

Thanks to your post, you are the first one out of all the tech guys to
tell me the difference in MC between power and non-
power.........................MO

On Feb 3, 8:24 am, "Daniel McCormack" <mcwhe...@xxxxxxxxxxxxxx> wrote:
> A few years back I converted a 66 Belvedere to non power disc brakes and did
> a lot of research into this. What was recommended was a 1" bore MC that
> seemed to be hard to come by. I used a non power Volare MC from NAPA with a
> 1 1/32" bore and it worked out great. You'll find that the bores vary from
> about 15/16" to 1 1/8" and the larger the bore the less travel your brake
> pedal will have but the more leg pressure it will require to stop the car.
> The larger bores like the 1 1/8" are usually found in power brake
> applications. Plus some of the power brake MC don't have the ridge inside
> the piston to hold the rod in place so tell them it's for non power brakes
> and I'd get a brand new MC not a rebuilt.
>
>
>
> -----Original Message-----
> From: 1962to1965mopars@xxxxxxxxxxxxxxxx
>
> [mailto:1962to1965mopars@xxxxxxxxxxxxxxxx] On Behalf Of Bill Paxton
> Sent: Friday, February 03, 2012 6:58 AM
> To: 1962to1965mopars@xxxxxxxxxxxxxxxx
> Subject: RE: Brakes need pumped to work, why?
>
> I'll be running the larger disc brakes on my belvy. Non power. What m/c
> should I use?
>
> -----Original Message-----
> From: 1962to1965mopars@xxxxxxxxxxxxxxxx
> [mailto:1962to1965mopars@xxxxxxxxxxxxxxxx] On Behalf Of Jim Altemose
> Sent: Thursday, February 02, 2012 3:22 PM
> To: 1962to1965mopars@xxxxxxxxxxxxxxxx
> Subject: Re: Brakes need pumped to work, why?
>
> Are you disc and drum?  Did you convert from drum / drum?  Did you add
> or do you have a proportioning valve?
>
> - Jim
> Jim Altemose, Long Island, NY
> '63 Polara 500 (Max Wedge)
> '63 Polara 500 (383)
> '65 Belvedere I (Street Wedge)
> '71 Bronco
>
> On Wed, Feb 1, 2012 at 11:43 PM, Eric R <hoodoovoodoo...@xxxxxxxxx> wrote:
> > Thanks Daniel.  I'll try the other stuff first, then look into the
> > bore size. Yes, it's a disc/drum m/c.
>
> > This m/c was supposedly  "new" from Rock Auto.  But, it also was a
> > closeout at $30.
>
> > I think there's good ideas here. Thanks!
>
> > On Feb 1, 11:38 pm, "Daniel McCormack" <mcwhe...@xxxxxxxxxxxxxx>
> > wrote:
> >> Eric the Dart MC you used is for front disc rear drum brakes correct? The
> >> rear chamber is larger than the front and the rear chamber goes to the
> front
> >> brakes right? Assuming all that is correct do you know what size bore
> that
> >> Dart MC has? Years ago I converted a 56 Ford F-100 to a torsion bar front
> >> suspension from a Chrysler Cordoba. (yes there's a kit out there to do
> that)
> >> I used the disc brakes from the Cordoba and a Dart MC and ran into the
> exact
> >> problem you're describing. Turns out the bore of the MC was too small for
> >> the Cordoba calipers. Switched to a larger bore MC and the problem was
> >> solved. The other possibility is that the MC is defective. Was it brand
> new
> >> or a rebuilt? I've never had any luck with a rebuilt MC.- Hide quoted text -
>
> - Show quoted text -

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