65 Chevelle-Drum Brakes, Single Master to Dual Master - Chevelle Tech
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Brakes, Suspension & Steering Conversion questions & more.

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  #1  
Old Feb 23rd, 12, 11:15 AM
akw5501 akw5501 is offline
Al
 
Join Date: Aug 2011
Location: MN
Posts: 30
Default 65 Chevelle-Drum Brakes, Single Master to Dual Master

I have a 65 Chevelle Convertible, currently has drum brakes and a single cylinder master with no booster.
I want to add a power brake booster and would like to convert to a dual master cylinder. I have tall valve covers and I'm pretty sure I'm limited to using a 9" brake booster vs 11". I can find the 11" booster with the dual master for a 67 Chevelle but I haven't found a 9" booster with a dual master.
I purchased a 67 chevelle 11" booster with dual master and a 9" booster from O'rielly's and the master cylinder wouldn't bolt on the 9". Bolt centers worked but I had approx. 3/4" of gap between the booster and the master, wouldn't go down all the way.
Does anyone know where I could get a 65 Chevelle 9" brake booster with a dual master cylinder for drum brakes?
Or a way around it?
Thanks
Al
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  #2  
Old Feb 23rd, 12, 2:12 PM
Bryan59EC Bryan59EC is offline
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Bryan
 
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Default Re: 65 Chevelle-Drum Brakes, Single Master to Dual Master

Might try Classic Performance Products for a booster/master set.

If not going to disc brakes, consider using brake lines for a 67.
Also get the distribution block that mounts on the frame---I think 67 only

I used all the lines for a 67 in my 66 when I went to power brakes and a dual master.
(67 distribution block as well)

Also installed discs, but will wait until I drive the car before deciding on a proportioning valve.
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  #3  
Old Feb 23rd, 12, 4:33 PM
akw5501 akw5501 is offline
Al
 
Join Date: Aug 2011
Location: MN
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Default Re: 65 Chevelle-Drum Brakes, Single Master to Dual Master

Thanks Bryan
I know the booster and master can be mounted and plumbed from a 67'. Although the 11" booster most likely won't work with my tall valve covers-clearance issue.

My concern is with the larger master piston for disc brakes. I've heard that the brakes become very touchy/sensitive. I assume this is from the increased flow/pressure going into the smaller diameter wheel cylinder vs the bigger bore of a disc brake piston.

Thanks
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  #4  
Old Feb 23rd, 12, 10:47 PM
Chevycollecter Chevycollecter is offline
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Default Re: 65 Chevelle-Drum Brakes, Single Master to Dual Master

Try The Right Stuff Co. That's where I got mine.
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  #5  
Old Feb 24th, 12, 9:46 PM
Jack Action Jack Action is offline
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Denny
 
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Default Re: 65 Chevelle-Drum Brakes, Single Master to Dual Master

Quote:
Originally Posted by akw5501 View Post
My concern is with the larger master piston for disc brakes. I've heard that the brakes become very touchy/sensitive. I assume this is from the increased flow/pressure going into the smaller diameter wheel cylinder vs the bigger bore of a disc brake piston.
I'm happy with my 1-1/8" bore «disc» m/c with my all-drum car. I said it often and will repeat it again:

«I wouldn't go back to a 1" bore.»
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Chevelle Tech > Mechanical > Brakes, Suspension & Steering      Current Topic: 65 Chevelle-Drum Brakes, Single Master to Dual Master
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