I am installing my new dual (not duel you idiots lol) master cylinder on my 65 mustang. it says that on fords the rear cylinder which is bigger is for the front brakes. if i am running drums in the rear and disks in the front shouldnt my front brakes use the cylinder that is smaller since my drums would need more pressure?


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Remember that the majority of your brake force is need at the front wheels and not the back, hence why in drum/disk at the front are normally bigger so it make sense to have the biggerpart for the fronts

 

now i need to learn how to bend and flute brake lines.


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what type of dual cylinder you going for? I am planning to do it/get it done but am think a modern type one with the plastic reservoir might be nice so as to check the fluid without opening and letting crud and moisture in.

 

i got the one that comes with the SS brakes kit. the conversion kit was awesome. i did both wheels in about 30mins. everything fit perfect


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It isn't about pressure it is about fluid volume. The pistons in the front calipers are bigger and require more fluid to compensate for brake pad wear. As the pads wear the pistons move farther out in the bore and require fluid to push that piston out and make up the volume of were the piston used to be.

 

makes sense...


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Your master cylinder also has built in valves for either disc or drum brakes. Don't switch 'em! If you want to run the hydra-boost off the modern cars, you'll need to either swap to 4-wheel disc or buy a residual valve for the rear drums.

Also, drum brakes are self energizing and require less pressure to apply than disc brakes. This is why the factories didn't offer manual brakes with discs...only power. Personally, I like manual disc brakes.

 

Colorado, my car has manual front disks and i am sure manual disks were an options or have i misunderstood what u were saying?

 

No, you're not. Disc brakes are generally not offered in manual form. Usually it's power disc brakes.

I've never heard of manual discs from the factory, but I can't say I'm 100% correct...just haven't seen it.

With the right sized master cylinder piston and leverage attachment to the brake pedal, the effort to stop isn't bad, but is noticably harder than 4-drums. I wouldn't want the average lady trying to stop quickly.