Quote:
|
Originally Posted by scottk
71firebird400, skip to bottom 
Scarebird, I have a question, are your 55-57 kits using the metric calipers, or the larger ones?
But sure if the bore and stroke are the same, and the spring rates are the same, the pressures should be identical.
I have no knowledge of the stoke of the fruit-jar masters, but the bore depth of the tandem drum master is shorter by almost 1", making for a potential of a much shorter stroke, depending on the length of the secondary piston in either unit. The best the tandem drum master can come up with as far as stroke would be 1/2 the difference in total bore length per circuit as the best the disc master can do.
If it cant deliver enough fluid to the front because the secondary piston bottoms out, the pressure will quit building in the front circuit. There were many different length secondary pistons, creating the possibility for some people to have problems, while others do not.
But it is a moot point, as he said he has a disc master anyway.
========================================= |
Scott, having half the stroke in a dual master would make sense, as you are doubled up on pistons. That aslo solves a question I have myself, essential whether a dual piston master woul work on a OEM single booster- by your logic that answer would be no, as the booster stroke is twice as much, and would be too sensitive to use.
Our 55-57 Pontiac setup uses 2.9 inch pistons- previously 70-76 Firebird now 90-02 Astro AWD.