I don't know the answer to your question but for a zillion reasons you ought to develop the habit of regularly purging the whole system with new fluid on classic cars. Brake fluid is hygroscopic and corrodes master cylinders if left a long while. Your vehicle is not dual-diagonal so a rusted through brake line is a serious matter. Etc.
As long as the new reservoir isn't kept full and the hose is 3/8" or so it should be fine. The reason for the "extra" room is so that as the fluid heats up and expands it doesn't apply the brakes for you!
I second the idea of keeping fresh fluid in there, and if possible updating to a dual split system. Should be easy using a master from a dual drum vehicle.
Ivan Vegvary wrote in news: snipped-for-privacy@googlegroups.com:
Shouldn't there be an access-panel set into the floorboard? Back then, such things were meant to receive constant attention, and provision was usually made for just that.
You're fine. No air is no problem at all. If the brakes continue to work properly, then your fix is good (and a good idea). But it's not "correct"; you may get frowny-faces from purists at your next show.
Studebaker actually offered a remote reservoir for its cars with the under floor master cylinder, so I don't see the issue with your setup.
If you used a clutch reservoir the cap should have a bellows with a hole in the cap on the atmosphere side of the bellows, so again, no problem.
nate
Nate, thanks for the info and your time. Ivan Vegvary
Another thought. Unless you drilled through the vent hole in your old cap for the fitting (presumably this is a typical Jeep/Studebaker underfloor MC with the metal cap, and you used a right angle NPT to hose barb fitting?) you will need to find how the old cap is vented and fill the vent with a lo ctited grub screw, braze, solder, etc.
nate
Drilled through center of cap and threaded 1/4" NPT. Installed barbed fitting. Ivan Vegvary
The typical old American MC that I'm thinking of had the vent hole on the side of the hex of the cap. May want to have a look at that before you fill it up with fluid, so it doesn't leak out and down the side of the MC/frame rail.
nate
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