I was wondering if anyone added a remote reservoir to a stock under the floor master cylinder cover? Any drawbacks doing this?
I did it to the '46 Ford I built. No drawbacks, but make DAMN sure the cap fits TIGHT. It willl fill only to the level that the pipes are set to in the master's side. Do NOT fit to the cap, as you will compromise the seal, which needs to be perfect. I used a master reservoir from a Geo or some such POS. Cosmo
I was thinking about the fittings in the cap but didn't know how well I could seal the tube around the rubber seal of the cap.
I tried using a mustang m/c, put fittings in the side of the reseviours, it leaked like a seive out of the cap. I ended up buying a high dollar m/c . If you're using manual brakes use a 7/8" bore cylinder
I have done it, making a new cap out of 1/2" aluminum, and making clamps to hold it down for a positive seal. With a stock tin cap, you can use a couple worm clamps to make it seal. I have also used S10 master cylinders with the plastic reservoir, pop the reservoir out of the rubber grommets, and make a fitting that will fit in the grommets like the reservoir did, that you can attach a hose to. Mazda 626 has a nice reservoir than can be used mounted remotely.
Thanks for the info on the M/C's I'll check those out as it would seem possible to get these to work without leaking.
some studebakers have a remote filler for the mastercylinder that mounts on the firewall. from there, a line runs down the the m/c and the stock cap is drilled and tapped for a pipe fitting and the line goes into that.
Old style Beetles also use a remote M/C resevour. You may be able to adapt something from one of them. A press fit is all you need because there is no real pressure in them. Many late model M/C resevours just press in to the M/C with a rubber grommet.
i have made a remote M/C using a M/C from a GM misize that had the plastic resevoir that snaps onto the metal body of the M/C. I had the local machine shop turn out two bungs that duplicated the portion of the plastic resevoir that snaps onto the M/C. I drilled and tapped the bungs for a screw in nipple and snapped them in place. I used a remote resevoir from a Ford Courier pick up and used some small hydraulic hose to connect it to the M/C. In use now for 9 yrs.
I dont have a pic anymore but last year at hershey I picked up an accessory remote resivoir for a 48 pontiac.. it was a glass jar with a screw on lid and a fitting in the bottom to allow fluid to flow down to the under floor master.. it came with the correct screw in cap that would have replaced the cap that originally pluged the top of the stock master.. I sold the darn thing on ebay for big bucks... I have yet to see another. BUT.. they gotta be out there... and of course it would be era correct.. sawzall
On the 7/8" bore, is that for four wheel drums, 2/2 drum/disc or four wheel disc? Just curious... I'm trying to suck up all the info I can about four wheel disc setups (manual specifically) as that's what I'm putting on the F-100... Any input would be appreciated... Thanks, Ben
bringing this back to the top for an additional question: if you have a screw-in mc cap with a vent hole (like most all of the old ford under floor mc's) AND - you install a remote reservoir by drilling/tapping into the side of the mc - can you just weld the vent hole shut in the mc cap? do you have to do anything else for venting? drill a vent hole in the remote reservoir cap?
Its standard on early 50's Cadillacs prior to 1956 ... M/C under floor with the resevoir mounted high on the drivers side firewall ... Small Aluminum reservoir, using standard 1/4" brake line ... no vent ... cap screws on tight with a cork gasket ... See them come up periodically on ebay ... Aluminum MC filler shown at upper right is the remote MC filler on 52-53-54-55-56 Cadillacs ... Deceptively LARGE reservoir volume with a couple of ounces in top ... plus the entire length of 1/4" brake line ... Threaded hole in filler cap of M/C for 1/4" brake line ...
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