Re: Manual brake conversion

Posted by Chris R On 2021/4/30 16:02:11
So, I've been doing some research on getting rid of this Treadle-Vac setup and ran into an article on lowrider.com of all places. It details a disk brake conversion on what looks to be an old Pontiac with the same setup as our cars.

The master cylinder setup is the same unit that Howard mentioned previously. In the attached images, you can see a pivot type mechanism that looks to change the ratio away from 1:1. So, I got to thinkin, I wonder if we could use just that mechanism with a manual dual circuit master cylinder and make everything really easy.

I gave them a call and ran everything by them, the gentleman on the phone confirmed that the piece I'm referring to maintains a 4:1 ratio. He then went on to tell me that I didn't need that part if I went with a manual master cylinder. He said that ratio was only needed with a power assisted setup, and that the 1:1 would be fine for a manual master.

I asked him how it would be possible with the 1:1 ratio. He went on to say that if you find the right master with the right bore size, it wouldn't be an issue. I did go on to ask him if that part was available for purchase anyway, and he said it is and he "thinks" its around $160.

What do you guys think? Is retaining a 1:1 ratio with a manual master possible if we change to a different bore size?

-Chris

Attach file:



png  ABS Power Brakes.png (1,182.23 KB)
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png  ABS Power Brakes 2.png (1,065.02 KB)
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png  ABS Power Brakes 3.png (987.04 KB)
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png  ABS Power Brakes 4.png (1,236.34 KB)
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