Re: Treadlrvac???????

Posted by PackardV8 On 2009/5/23 21:19:19

"No one versed in fluid theories has spoken up as to the exact reason why TV works at that low ratio. Best guess is because of the narrow piston and longer stroke, it's essentially displacing fluid by inserting mass & squeezing it out rather than "pushing" it out the opening in front of a piston. "

I don't think it requires a PhD. in fluid dynamics.
A SAMLL piston requires less effort than a larger piston.
A 1:1 pedal ratio requires more foot effort than say a 3:1.

THe BTV 5/8 piston is a SMALL piston compared to nearly every other automobile MC i've ever seen. Most MC's are at least 7/8 inch to 1-1/8 inch diameter. But such cylinders have a lot of pedal leverage.

The fact that the BTV "squeezes" out the fluid rather han "pushing" out the fluid is irrelevant.

Samll piston = 1:1. Big piston = more pedal leverage needed.

The smaller the piston the further it has to travel to displace the same amount of fluid that a larger piston would displace at less travel.