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Re: swapped the 11 inch discs in and now brakes are FIXED [Re: Andrewh] #1733358
01/25/15 12:07 PM
01/25/15 12:07 PM
Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
R
Rick_Ehrenberg Offline
top fuel
Rick_Ehrenberg  Offline
top fuel
R

Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
Just my usual 2¢ worth...

The pressure at both ports on any non-stepped bore master cylinder should be virtually identical (assuming no external leakage), except for the instant of pedal application...more in a moment.

One reservoir is always larger on disc/drum masters. The large-reservoir end must be plumbed to the the disc "end" of the car (read: front). This is because discs have no adjusters, the piston slowly moves out as the pads wear, taking the fluid level down with it.

Under normal operation (again, no leaks), the secondary piston the the master "floats" and is applied (moved) via pressure created by the front end of the primary piston. This means that the primary side of the master will have full pressure a few milliseconds before the secondary. Plumbing the primary outlet to the fronts, as on Mopars, will tend to reduce poor-road-friction rear wheel lockup, and partially compensate for the extreme "grabbiness" (self-energizing servo action) of our Bendix rear drums.

Thanks for allowing my drivel...

Rick

Re: swapped the 11 inch discs in and now brakes are FIXED [Re: Rick_Ehrenberg] #1733359
01/25/15 02:39 PM
01/25/15 02:39 PM
Joined: Feb 2012
Posts: 4,443
Morristown Tn.
7
71birdJ68 Offline
master
71birdJ68  Offline
master
7

Joined: Feb 2012
Posts: 4,443
Morristown Tn.
Just another good reason to stay away from non Mopar parts. These conversions aren't hard at all, and work when factory Mopar parts are used.

Re: swapped the 11 inch discs in and now brakes are FIXED [Re: 71birdJ68] #1733360
01/25/15 03:14 PM
01/25/15 03:14 PM
Joined: Feb 2003
Posts: 8,659
A
Andrewh Offline OP
master
Andrewh  Offline OP
master
A

Joined: Feb 2003
Posts: 8,659
while it is true "factory" mopar parts are way more expensive.
just finding a booster alone would have been more than this whole kit.
even after "fixing" it I am still up compared to a mopar swap.

it is funny, for 60's mustang's and 60's chevy's you can find a bendix dual diphram booster for around 100 bucks. for a mopar it is minimum 200 for a knock off. 350 for a real one IF you can find one.

even modern mopars, are about 50 dollars more than the equivalent non mopar modern booster.
I did a search on every booster autozone sells and you can see the crazy disparity.
even a volvo booster, which has to have fairly low volume was cheaper than the intrepid booster.

so yeah, would I have liked to use mopar parts. sure. but for double the money? not really that big a deal to me as long as it works.

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