Hi everyone I have a 1960 El camino I want to add power ***ist to my stock drum brakes after doing some research I found out about residual valves I have been working on cars for years and never really come across them although i have rebuilt master cylinders off 54 chevs etc and have seen that cup shape valve i never knew what it was for. I want the setup not to look to much out of place I was just going to use the standard single master cylinder off a later model 1964 chevy . I would go to a dual cylinder bur i really hate the look of those oversize corvette style units everyone sells , Also if I get a dual master off say a 1969 Camaro with brake drums is there a residual valve inside? Or is it in the brake line distribution block (sorry dont know the right name for it where all the lines go into) I much prefer the look of this cylinder https://www.ebay.com.au/itm/Camaro-...Lv5PairwiseWeb&_trksid=p2047675.c100005.m1851 Also if my stock cylinder now is 1" should I retain this size for power brakes?? I still might just go the single power system just because I like the look of it, I will buy this bracket to keep the setup horizontal I dont like the angled setup https://www.ebay.com.au/itm/1955-19...e=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649 Any help Appreciated
Look at master cylinder for 68 Catalina/ Bonneville. They are way smaller than corvettes, and drum drum. Adding power, you want to up the bore size and change the pedal ratio closer.
Belair I have done this many times but that doesn't make me an expert, that said. I have used the master off of 66-67 full size Chevrolets, they have 11" brakes like your Elcamino so that will work. As far as pbs just get the mc for pb. As far as the residual check valve they are in the mc. I forgot if they are for disk brakes or drum brakes but if you get the mc for what said they are both drum brakes. I always run a distribution block just makes it easier for me, I know some people don't use them. I may have a distribution block I'll look. Oh wait I just looked where you are, it's easier finding one in Australia. Cut the fittings off the donor car as they are odd wrench size compared to the tubing. Good luck. Pat
Thanks 31 Vicky I like the look of that master cylinder so get the one for Drum brakes and I suppose shallow piston hole there are 2 types to suit Bendix or Ac delco booster. I will just run an aftermarket 7" or 8"single booster so I think the 1" bore will be ok as my original. i also notice my brake pedal has 2 holes in it apparently the top one is for manual brakes lower is power brakes so that gives me some adjustability. So definitely will contain the residual valve?
Thanks for the offer 1934 coupe I am all good I just replaced all my brake lines so will try and keep my system as original as possible I will just need to plumb the line to the rear . The 67 Chevy fullsize look the same as the Catalina thanks again.
Do your research because upping the bore size is s what the OEM does in most applications that have power vs manual. Later I’ll grab a pic side by side of aftermarket universal Corvette next to the 68 Pontiac master cylinders
Some had residual valves in them (drum/drum), but sometimes during the rebuilding process they don't go back in. Just go with the year range Squirrel gave and take a paperclip with you, gently poke through the tube seat to see if you feel a spring or springing action.
Thanks 31Vicky for that last comparison photo why did the aftermarket run with the ugliest looking master cylinder is it because it has a large storage capacity I have not picked one up but I would bet it is heavy. I have some old Aluminium PBR ones in my shed off a Holden I might look into them also but the Aluminium surface is not hard wearing unless it is sleeved. This is a holden one https://www.ebay.com.au/itm/Holden-...b&brand=Ultima&_trksid=p2047675.c100005.m1851 I will stick to the recommendations here thanks again
I don’t know the answers to those questions, Maybe it’s the legacy of the Corvette and having Corvette brakes on anything you want With some sort of implied specialness It’s big it’s ugly and it’s easy to get
I’ve used the Geo Metro units before. With some effort you can make it remote res and hide the cylinder with a little box or fins or your imagination is the limit
Most guys use disc brakes, so they use a disc brake master cylinder, which has larger reservoirs to allow for pad wear.
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