67 dual master for drum brakes on 64?

f-85 · September 8th, 2009, 03:31 PM

I gotta 64 F-85 with power brakes single master. Can i use a 67 dual master for drum brakes on my 64? Ive redone my brakes all around and really dont need the disks. I just want to be alittle safer.

Run to Rund · September 8th, 2009, 04:41 PM

Yes. The pin through the pedal arm gets moved to the other hole for manual brakes. You need the cup shaped retainer for the pushrod in the master cylinder; it cam on manual brake cars 67-72.

f-85 · September 8th, 2009, 05:25 PM

Cool thanks! Im gonna do it then!

Bluevista · September 8th, 2009, 05:55 PM

I'm confused or missing something.

You're going from a single reservoir/line master cylinder to a dual reservoir/line type so the systems are seperated for safety?
Wouldn't you have to put a different distribution block in that seperates the front and rear braking systems and would have two inlets for the MC lines?

f-85 · September 8th, 2009, 06:15 PM

Quote:

Originally Posted by Bluevista

I'm confused or missing something.

You're going from a single reservoir/line master cylinder to a dual reservoir/line type so the systems are seperated for safety?
Wouldn't you have to put a different distribution block in that seperates the front and rear braking systems and would have two inlets for the MC lines?

Not from what i have read on the HAMB. The master distributes the power different. Something about the size of the output.

Josh

ent72olds · September 8th, 2009, 06:18 PM

Quote:

Originally Posted by Bluevista

I'm confused or missing something.

You're going from a single reservoir/line master cylinder to a dual reservoir/line type so the systems are seperated for safety?
Wouldn't you have to put a different distribution block in that seperates the front and rear braking systems and would have two inlets for the MC lines?

Yes, you would need lines, dist block & M/C....I just inquired about the same set up for my '65 Vista! The Right Stuff Detailing has everything you need...

joe_padavano · September 8th, 2009, 06:25 PM

Quote:

Originally Posted by f-85

Not from what i have read on the HAMB. The master distributes the power different. Something about the size of the output.

Josh

You have read incorrectly. There are several changes that are necessary.

First and most obvious is the dual reservoir master. To use this, you need separate brake lines for the front and rear brakes. You don't NEED a distribution block, since the only thing it does is provide a place for the differential pressure switch to live. Since the 64 doesn't have this warning light anyway, you don't need the block. Simply use a tee for the front brakes and run the rear line straight to the MC.

The second problem is that the dual MC will not bolt to the single MC power booster. The pushrod between the booster and the MC is shorter for the dual circuit MC. You either need a 67 booster or an aftermarket one for the dual circuit MC.

f-85 · September 8th, 2009, 06:39 PM

Quote:

Originally Posted by joe_padavano

You have read incorrectly. There are several changes that are necessary.

First and most obvious is the dual reservoir master. To use this, you need separate brake lines for the front and rear brakes. You don't NEED a distribution block, since the only thing it does is provide a place for the differential pressure switch to live. Since the 64 doesn't have this warning light anyway, you don't need the block. Simply use a tee for the front brakes and run the rear line straight to the MC.

The second problem is that the dual MC will not bolt to the single MC power booster. The pushrod between the booster and the MC is shorter for the dual circuit MC. You either need a 67 booster or an aftermarket one for the dual circuit MC.

Thats what i thought about the lines. But the booster? I have a new booster now. When i got it, it came with an adjustable pushrod. How much of a difference is the length?

ent72olds · September 8th, 2009, 06:43 PM

Thanks Joe, I forgot the booster, which had to be replaced!

joe_padavano · September 8th, 2009, 07:21 PM

Quote:

Originally Posted by f-85

Thats what i thought about the lines. But the booster? I have a new booster now. When i got it, it came with an adjustable pushrod. How much of a difference is the length?

Probably more than the adjustment. The single MC uses a pushrod that goes well into the MC piston. The dual MC uses a short pushrod that doesn't go very far. Just look at the end of the two MC's side-by-side and the difference is obvious.

f-85 · September 9th, 2009, 08:35 AM

Thanks Joe ill take a look at it. Im gonna go pick it up in a few min.

Run to Rund · September 9th, 2009, 10:05 AM

I assumed you were going to manual brakes. That is the situation where you need the cup shaped retainer for the pushrod, and to use the other hole in the pedal arm.

September 8th, 2009, 03:31 PM	#1 (permalink)
f-85 Registered User Join Date: Aug 2007 Location: Yorkville,il Posts: 279	67 dual master for drum brakes on 64? I gotta 64 F-85 with power brakes single master. Can i use a 67 dual master for drum brakes on my 64? Ive redone my brakes all around and really dont need the disks. I just want to be alittle safer. __________________ 1964 4DR F-85 455 1964 Olds Super 88 394 (sold to my buddy) 1958 International A-100 Project

September 8th, 2009, 05:25 PM	#3 (permalink)
f-85 Registered User Join Date: Aug 2007 Location: Yorkville,il Posts: 279	Cool thanks! Im gonna do it then! __________________ 1964 4DR F-85 455 1964 Olds Super 88 394 (sold to my buddy) 1958 International A-100 Project

September 8th, 2009, 06:43 PM	#9 (permalink)
ent72olds Registered User Join Date: Aug 2006 Location: LI,NY Posts: 786	Thanks Joe, I forgot the booster, which had to be replaced! __________________ Erik Turner 65 Vista Cruiser 72 Cutlass

September 9th, 2009, 08:35 AM	#11 (permalink)
f-85 Registered User Join Date: Aug 2007 Location: Yorkville,il Posts: 279	Thanks Joe ill take a look at it. Im gonna go pick it up in a few min. __________________ 1964 4DR F-85 455 1964 Olds Super 88 394 (sold to my buddy) 1958 International A-100 Project

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September 8th, 2009, 04:41 PM	#2 (permalink)
Run to Rund Registered User Join Date: Mar 2008 Posts: 337	Yes. The pin through the pedal arm gets moved to the other hole for manual brakes. You need the cup shaped retainer for the pushrod in the master cylinder; it cam on manual brake cars 67-72.

September 8th, 2009, 05:55 PM	#4 (permalink)
Bluevista Cruisin' the Vistas Join Date: Jul 2006 Location: Northeast Ohio Posts: 1,722	I'm confused or missing something. You're going from a single reservoir/line master cylinder to a dual reservoir/line type so the systems are seperated for safety? Wouldn't you have to put a different distribution block in that seperates the front and rear braking systems and would have two inlets for the MC lines?

September 9th, 2009, 10:05 AM	#12 (permalink)
Run to Rund Registered User Join Date: Mar 2008 Posts: 337	I assumed you were going to manual brakes. That is the situation where you need the cup shaped retainer for the pushrod, and to use the other hole in the pedal arm.

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