jimeby

I'm looking for Series 9 transmission gears or complete transmission is ok too. The case, shifter, etc don't matter since I'm mostly looking for a nice gear set. Contact: Jim Eby, 425-802-2194, jimeby@hotmail.com Thanks!

I sat in on the brake tech session at the Cazenovia Trek and just now got around to investigating some questions I had on brake master cylinders. The tech subject was a presentation on conversion from single to dual M/C performed and the issues with getting a firm pedal after installing a dual master cylinder. The presenter recalled that the master cylinder was listed as an early Corvette master cylinder. In my quick Google search, I found that the Corvette made 4 wheel disc brakes available starting on the 1965 model. I also found that Corvette transitioned to dual master cylinder in 1965 (for power brake cars only) then in 1966 all Corvettes were dual master cylinder. So if all the above is accurate, then the presenter used a front disc/rear disc brake master cylinder in his conversion. Now we look at the difference between disc and drum master cylinders. The differences seem to boil down to this: Disc: Larger reservoir Longer stroke No residual pressure valve Drum: Smaller reservoir Shorter stroke Residual pressure valve (typically 10psi) So, when selecting a master cylinder, the simplest conversion would be from a car with four wheel drums. The next choice would be from a car with four wheel disc brakes then add external residual pressure valves. However, from the differences noted above, I would not recommend a M/C from a donor car with front disc/rear drum brakes. The difference in fluid delivery and pressure in the two circuits would cause two ends (front to rear) the Franklin drum/drum brakes to be unbalanced. Since I don't even own a Franklin and dad's car is mechanical brakes and I have a race car to get ready to race this weekend, I'll leave the research into the ideal M/C up to someone else. Cheers, Jim For a better summary on master cylinders see: http://deemaxxcomponents.com/TechFull.aspx?ID=281