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Canadian Poncho Homepage -> Canadian Poncho -> Beaumont Chassis Tech Forum -> drum to disc
Post Info TOPIC: drum to disc
beauman


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drum to disc
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so I changed my front brakes from manual drums with a dual style master to the SSBC

manual disc,it stops a lot staighter,but still required a lot of pedal effort. So I put in a power booster and new dual master, but you still have too push pretty darn hard to slow down quickly. The kit came with a adjustible prop. valve, which I placed between the stock prop. valve for the drums and the rear brakes.Should I eliminate both adj. valve and the stock valve, and put one in from a front disc/rear drum power brake car?Has somebody else had these same issues?



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Lefty


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Valve has to be set for front disk/rear drums
not to sure how on mine the valve was preset from the supplyer

with the valve assembly mounted under the master cyl.

valve_(1024_x_768).jpg

master cyl level 1_(1024_x_768).jpg

master Cyl 1_(1024_x_768).jpg



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1963 Acadian Beaumont Sport Deluxe
http://www.63acadian.com/
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kelico


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mine came set up as well.. disc front drum back proportioning valve.. stops really well..


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rabbit64cs


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eliminate the stock prop valve.

look under the dash, should be 2 holes for the pushrod from the M/C to the brake pedal, try the other hole, it changes your leverage and mechanical advantage.

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beauman


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Thankyou for your replies, I changed the rod to the other hole when I changed to power, maybe I'll put it back. I looked at a few different Pontiacs at the Surrey show today,most of all had the prop. valve up under the master like your pics.So I think I will try a new prop. valve, Its the only old part in the brakes not replaced, other than the pedal. Cheers.

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rabbit64cs


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I changed over to factory discs on my A-body, I left the factory prop. valve. The only thing I can say, is that the pedal is real high, , other than that, the pedal felt slightly harder , but in a good way.



-- Edited by rabbit64cs on Sunday 12th of June 2011 10:40:30 PM

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later...rog

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beauman


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I shall find a diagram of the two different prop. blocks and see what the difference is,but I would like to use a factory set one instead of the adjustible one.Must be a spring and check ball system?

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427carl


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My Ventura II  had Wilwood manual Disc brakes  

It stoped great.........  

you just got used to more effort to push...once I did it was great



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Lefty


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does this help ?

valve 7.jpg



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rabbit64cs


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my understanding of the proportioning valve is just that, to set up your front and rear Bias braking?

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later...rog

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beauman


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Excellent illustration Lefty! and yes , it just controls pressure bias front to rear, the SSBC kit I purchased included a adjustable valve that just limits flow to the rear.
Soooo, it will be removed, along with the drum valve, and a proper disc\drum valve will be used. I thank you guys for your input! Andy.

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