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  '64 1/2 to '68 1/2 -- The Classic Mustang
  dual chamber chamber master cylinder conversion

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Author Topic:   dual chamber chamber master cylinder conversion
justgota65
Journeyman

Posts: 84
From: Plainfield IL
Registered: Nov 2001

posted 11-26-2001 05:19 PM     Click Here to See the Profile for justgota65   Click Here to Email justgota65     Edit/Delete Message   Reply w/Quote
Any here do a conversion from the fruit jar master cylinder to a dual chamber type on like a 65 or 66? Does anyone make a kit for such a conversion?

Ron

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Ron
computer geek by day, Gear head by night
Http://ron.oglesby.com/mustang.html

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Moneymaker
Administrator

Posts: 27870
From: Lyons, IL, USA
Registered: May 99

posted 11-26-2001 06:21 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Ron, a late 80's Ranger, or 67-8 Mustang master cylinder will work well. You will need to get some lines and some adapter and junction fittings. We have a long detailed thread in our archives about the swap.

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Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
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thedave66
Gearhead

Posts: 244
From: mountain home, idaho
Registered: Sep 2001

posted 11-26-2001 09:07 PM     Click Here to See the Profile for thedave66   Click Here to Email thedave66     Edit/Delete Message   Reply w/Quote
1978 ford granada master cylinder bolts right up. All you need is a new proportioning valve.

dave

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justgota65
Journeyman

Posts: 84
From: Plainfield IL
Registered: Nov 2001

posted 11-26-2001 09:12 PM     Click Here to See the Profile for justgota65   Click Here to Email justgota65     Edit/Delete Message   Reply w/Quote
cool. then this goes on my "list of things to do..."

Ron

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Ron
computer geek by day, Gear head by night
Http://ron.oglesby.com/mustang.html

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rockafellz
Gearhead

Posts: 1449
From: San Lorenzo, CA, USA
Registered: Aug 2001

posted 11-27-2001 11:42 AM     Click Here to See the Profile for rockafellz   Click Here to Email rockafellz     Edit/Delete Message   Reply w/Quote
Hello All,

My dad and I just did this conversion this past weekend.

We used a 1967 Dual master cylinder and the pushrod that came with the Dual MC. We were so frustrated for about an hour because we couldn't figure out why there was no pressure building up (pedal to the floor).

Just as we were about to pull out the new MC, we compared the new pushrod to the old pushrod. The older one was about 1 inch longer. We bolted that old pushrod in BINGO! Pedal was instantly back to normal.

NOTE: use original pushrod!

Also, regarding the lines. We disconnected the rear brake line from the distribution block, bolted a female to female adapter to the rear line, bent a new line to fit from there to the front of the MC.

Plugged the open hole in the distribution block, ran a new line from the rear of the MC to the distribution block.

NOTE: front lines go to the rear of the MC. Rear brake lines go to the front of the MC.

Question for experienced brake mechanics:

You guys mentioned previously to NOT use COPPER lines. Why?

Also, we bought straight steel lines (with fittings already attached) and the fittings were in a gold like color. Those weren't copper fittings were it? No leaks so far.

Sorry to add those questions to your post. But if someone answers it, at least you'll have a better knowledge.

Regards,

Erik

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Scott302
Journeyman

Posts: 40
From: Livonia, MI, USA
Registered: Mar 2001

posted 11-27-2001 05:39 PM     Click Here to See the Profile for Scott302     Edit/Delete Message   Reply w/Quote
Copper lines cannot hold the pressure. They will either expand making the pedal mushy or just split. The fittings are cadmium plated steel.

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Scott Halseth
National Parts Depot
65 Convt
66 Coupe

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Moneymaker
Administrator

Posts: 27870
From: Lyons, IL, USA
Registered: May 99

posted 11-27-2001 06:56 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Good tip from Scott of NPD. NEVER use copper line or compression unions for brake lines!

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Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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SteveLaRiviere
Administrator

Posts: 46243
From: Saco, Maine
Registered: May 99

posted 11-27-2001 07:50 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
Copper for brake lines is illegal in all states that have safety inspections for the very reasons Scott cited.

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[This message has been edited by SteveLaRiviere (edited 11-27-2001).]

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