I've updated the original brake system to a dual master but just not totally comfortable with the braking ability of the system. Thinking of doing a disk brake / power booster conversion this winter and wondering if anyone has done it to our Ponchos?
Well my winter project has been off and on for quite a while but I'm finally starting to see the end of the tunnel. Disk conversion went really well - got a kit from Horton Hotrods in Milton and everything bolted up great. Tried keeping the drum/drum master setup I had done prior, but that was a crap show (others say they've made it work but I sure couldn't). Modified my old master mount to extend further under the floor so I could add a dual 7" booster to the setup - using a corvette m/c. Just need to get everything bled and hook up the vacuum. That's the question - where is the best place to pull the vacuum from? I'm still running the stock 239 flat head six.
Very nice set up. I am nearly at the point where I have to make the same decision. Did you consider just using the new master reservoir without the power boost?
Are the pedal configuration the same? Horton Hotrods ? Milton ? I am really interested in where you pick up the vacuum from. Are your wipers electric or vacuum?
I hope your conversion works well.
Regards
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New Brunswick , 1950 Pontiac Silver Streak 2 Dr Sedan, 1967 Beaumont, 1985 Sierra 1500 One Owner
Having messed with a couple hotrods over the years I've only run non-power under the floor. Your set up looks very well done. With the new system, you should have residual pressure valves in the brake lines going to the front and rear and of course a proportioning valve for drum/disc configuration. The vette master cylinder just has two equal reservoirs unlike a drum/disc which has a large and small reservoir.
To draw vacuum I would take from the intake manifold and don't forget the check valve at the brake booster so you don't loose vacuum.
I've got the proportioning valve and residual valves in line but you can't see them in the photos. And the m/c is for a disk/drum setup - does have 2 different sized reservoirs. Paul at Hortons was very helpful in making sure I had everything I needed.
For the vacuum I'm going to tee off the 1/4" line going to the wipers - the only other port on the intake is an 1/8"npt so I'll go with the larger. Thanks for the input on the check valve !!!
I didn't have much of a problem bleeding them when I first did my dual system - hope things are the same - that's tomorrow's night task - wish me luck
Very nice set up. I am nearly at the point where I have to make the same decision. Did you consider just using the new master reservoir without the power boost? Are the pedal configuration the same? Horton Hotrods ? Milton ? I am really interested in where you pick up the vacuum from. Are your wipers electric or vacuum? I hope your conversion works well. Regards
Hey Dale
I tried to be cheap and make the drum/drum master work originally, but when it didn't and I needed to replace it as well I decided to go the booster route. There's only about a 4.5:1 advantage on the stock pedals - everything I read said you should be around 6:1. The mount I made keeps everything in the original location/configuration - even reused the same locking system the original setup had. Hortons is in Milton Ontario - just west of Toronto.