Re: New Twist on Brakes-Check it out

Posted by HH56 On 2012/11/16 11:20:15

I think the problem is more involved than just the size of the MC. There are some small diameter MC units available that could go on the end of the 7" single booster and effectively do the same as attaching to the end of the BTV would do. Even more actually because the BTV is only around 6" diameter. BTV would also need some machine work and changes to keep the vacuum in the shell and have the MC rod support the power piston. Problem is except for BTV and clones, all other cylinders than and now are short stroke -- less than 2".

The big problem as I see it is trying to match the increased pressure obtained by displacing the fluid out a little at at time over a long distance vs pushing the same amount of fluid at a larger area and shorter distance. I do believe that displacement and long stroke is the entire reason the BTV is able to use a 1:1 ratio.

Might be interesting if someone with more math skills than I could figure how much fluid would move and the pressure advantage obtained by shoving "X" square inches of solid object at say 100 lbs into a confined space with an area of "X". This would be done over a distance of say 2 inches to give a mid range number. See if anything modern could be made to come close and at what tradeoff. I don't think it will happen but it would be interesting to know what that ECI booster unit could do.

EDIT to bhappy's question: I don't think any mfgs are looking into it because I don't think anyone else used the BTV like we did so really not much demand. The other cars using BTV's mounted them high or on the firewall and had pedal ratio advantage from the start. There are direct bolt in replacement kits available for those applications. As to the complete rebuild kit, that is a sore point. It was brought up several times in past discussions as to why various or complete and deluxe kit combinations containing every possible replacement part couldn't be put together. A major vender said there was no need.