Re: Power brake and standard trans.

Posted by HH56 On 2011/1/16 13:30:51

I agree with the first post you deleted.. That is pretty much the way the formula was described- I got all that data from herehttp://www.deanoshiro.com/brakes/brakearticle.html#booster

The small BTV is able to put out the extra force because of the small equivalent master. Just how much that extra force is has got me curious so as to explain how they got away with the 1:1. Also the volume Chevy vs Packard with same unit but different ratios.

There is not that much volume needed if shoes properly adjusted so maybe that is how. Chevy just puts out what was needed but more force & maybe smaller cylinders. Had toyed with a smaller master and single 7 here. Decided to keep things easy to find instead with the 1"--but the single 7 is still under consideration because of the benefits in packaging..