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Posted by Paul (in NY) on Saturday, May 23, 2009 at 10:48:08 :
In Reply to: master cyl question posted by John S on Saturday, May 23, 2009 at 08:30:19 :
No, the stock MC will not produce the needed displacement to operate 4 wheel disks properly. Back in 2000, when I built my Bumblebee, I tried a 1.0" MC, dual chamber.
I had good brakes but no reserve on the pedal. It was almost to the floor.
I then changed to a 1 & 5/16" Master Cylinder which gives roughly 15-20 % more displacement. That gave me great brakes and pedal about 1/2 ways to the floor on a hard stop.
Since then, I have used the 1 & 5/16" master cylinder on all my conversions to disk brakes.
The NAPA number is 39017. The Bendix number is 11584. This is a dual chamber MC with NO residual pressure check valves so it will only work properly on a 4 wheel disk system.
If your running rear drum/front disk, you will need to add a residual pressure check valve on the rear drum line.
Paul
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