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  #11  
Old 09-01-2015, 04:49 PM
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Default disc coversion k/H under dash puzziled

Both myself and Howard Prout have the KH under dash booster in our Squarebirds. We did NOT take it out when we did our front disc brake conversion. We just left it in place as it was. Looking at the kit you referenced, I also do not see a dual 8" Power Booster with that kit. IF your car has OEM AC on it, you are gonna have to come up with a mounting bracket that will get that booster/MC past the AC plenum box. You will probably have to make a bracket if you have AC.
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  #12  
Old 09-01-2015, 05:56 PM
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They should work without the booster. I've had lots of British cars with manual front disc brakes.

If the car is not running (producing vacuum assist to the booster) and the pedal is still soft there is still air in the system.

Just a reference guess but if it takes 100lbs of pressure on the pedal to stop the car without the booster it should take less pressure (on the pedal) with the "booster assistance". The under dash booster will help but probably won't provide enough boost to make the system feel like a modern disc brake setup. I have the original Bendix booster (modified to accept a new style master cyl) under the hood and it works fine - probably requires more pedal pressure than the new dual boosters but I like mine as is.

The pic in that link doesn't show a proportioning valve only an adjustable rear residual valve. I'm guessing you did you re-plumb the system and split it by taking out the junction on the frame? Needs to be separate systems front and back now with the addition of front discs.

Eric
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  #13  
Old 09-01-2015, 06:04 PM
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Default disc coversion k/H under dash puzziled

Every time I log onto this Forum, I learn something new! Thanks for posting that information, Eric! I thought one had to have the booster for that complete system to work properly. Apparently, it is better if you have it, but it will work without it...
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  #14  
Old 09-01-2015, 06:09 PM
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No problem Ray - difference is though the British cars were designed not to have a booster so the pedal ratio etc is I'm sure different (as well as weighing 1/2 as much).

Can't imagine how much pressure you would need to stop these 2 ton Birds without a booster. Don't think it would be very comfortable to drive (or stop).

Eric

Just for fun......

Current resto with non power front discs


close up of the front discs



And I converted this one from front drums to front discs while restoring.

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  #15  
Old 09-01-2015, 06:16 PM
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"Working" is a relative term. You can also stop a car with your feet but I wouldn't want to try it. Should work and does work are two different things. I can't wait until Dave sees this. Let the fireworks begin.

John
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  #16  
Old 09-01-2015, 06:24 PM
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Yea John - I probably should have said .....

"The master cyl should move the caliper pistons even without the booster" rather than using that 4 letter word (work)

Eric
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  #17  
Old 09-01-2015, 06:34 PM
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I just feel sorry for people who spend good money on these untested systems. I notice on their website there are no reviews on these Ford systems. They also don't know that there was no such thing as a "Galaxie" in 1957. It's rediculous that they have the same kit from 1957-1966 regardless of the model.

John
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  #18  
Old 09-01-2015, 10:04 PM
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I always get a little chuckle when I read all these threads on brakes and stopping pressure required. I have a friend that just turned 81, and he has a 1964 Ford Country Squire station wagon, talk about a beast, that has been in the family since new. The car has the 352 eng. with factory air but MANUAL 4 wheel drum brakes. He's still driving the car and to my knowledge the car has never been in an accident. I have borrowed the car to move some things, and you definitely need to be aware of the stopping distance required, but if you keep a heads up, it's do able.
God bless old school, but I am thankful for modern technology.
Nyles
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  #19  
Old 09-01-2015, 10:25 PM
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There are plenty of new cars in the junkyard that prove that even the best brakes can't overcome a careless driver.

John
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  #20  
Old 09-01-2015, 11:59 PM
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Default disc coversion k/H under dash puzziled

I would like to suggest to anyone who is contemplating converting their drum brakes to disc brakes to talk with us who have done this conversion BEFORE you go out and plunk a lot of money down on a aftermarket system that might not work for you... A number of us have gone through this conversion process in the past, using parts from various manufacturers, and various years, and from various cars. We saved a lot of money by doing it that way and can tell you what parts to get... So save yourself some grief, and expense and talk with us first. Then decide what you want to do.
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