RE: Brakes need pumped to work, why?

["Daniel McCormack" <mcwheels@xxxxxxxxxxxxxx>]

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 <hoodoovoodooray@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.
>>


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