what master cylinder for disk/disk set up?
do you have any issues with out the power assist?
comp cams is grinding me a cam that will have some vacuum but not lots to spare. i dont know if i should just ditch the booster or if i should keep it for the added assist
No power assist? NO problem!
I replaced the leaky line yesterday and drove the car today. The lack of power assist means that the cars braking power is consistant whether the car is running or not. Fat cam with 8 psi of idle vacuum? NO problem! car stall out and you need to stop? No problem.
My 67 Dart GT has a 73 Duster manual disc setup. It stops great. My brother in laws 72 Duster has a manual disc from some other 73-76 A body. It too stops great. last year I sold my blue Duster that had the same setup.
There are a few things to learn though when you deviate from factory stock. The 73-76 disc/drum setup when swapped over to a drum/drum car works like factory stock as long as everything is matched like the factory did it. Since yours is a 4 wheel disc system like mine, you need a dedicated disc/disc master cylinder and a drum/drum combination valve. My master cylinder is a 15/16" bore. The pedal travel is a little longer than with a power booster, but it does NOT feel touchy in any way. It does require more effort than a power setup, but I like the feel. I HAD to do something though. I hated how my car felt at low speeds! The '509 cam produces piss poor idle vacuum and the brakes suffered as a result of it.
Vacuum can? .....Sure, its been done. I thought about that but decided against it for three reasons: One, I was interested in CONSISTANT braking under every condition. No, my car doesn't stall often, so THATs not why I chose to go manual. The second reason I nixed the vacuum can is that I wanted simplicity. The third reason was to shed some weight and make the engine bay less cluttered. The power setup and iron master cylinder weighed 17 lbs. The aluminum M/C weighs 3 1/2 lbs. Every ounce helps. A lighter car accelerates better, stops faster, and handles better than an overweight one.
