rustytoolss
Well-Known Member
will this combo work ? 15/16" MC
2.75" calipers
15/16" rear wheel cylinders
With a dual 8" booster
2.75" calipers
15/16" rear wheel cylinders
With a dual 8" booster
Thanks for your reply, The booster might be bad . This conversion kit was install by P.O. and Ebay kit , so I'm trying for fix the problems, and make to system safe)I often use 1 1/8" master with 2.5" calipers and they work well so your 2.75" should be a little softer. Maybe your booster is bad?
Going to a smaller master will soften the feel and the pedal will travel farther down also
If the booster is absolutely good then go to a 1" master
What master cylinder is that ?I have a setup pretty close to this in THIS car:
View attachment 1169362
View attachment 1169363
View attachment 1169364
15/16" manual master cylinder, Aspen/Volare 2.75" single piston front calipers and 10" drum brakes with unknown size rear wheel cylinders. It stops quite well.
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Edit...The rear brakes are from a 1987 Chrysler Fifth Avenue. A Rock Auto search stated that they are 15/16" size.
thanks, and your using it on the bad *** 69 Charger ? Did you buy there fancy pushrodIt is an aluminum one from Dr Diff. 2 bolt mount with an adapter.
I can see that the 15/16" MC would provide less fluid to the system. Yet Kern Dog's 70 Charger is using the 15/16 MC and he says "it stops quite well" I sent an Email to Dr. Diff to see what he has to say about MC bore size . What came with 2.47" calipers ? the only sizes I know about are 2.60" and 2.75" .i've been thru this and found the 15/16" master cylinder doesn't have enough volume per stroke to feed the large 2.47 piston least wise a 2.75. maybe you'll get lucky, but i didn't. currently i use a 1.031" master cylinder with 2.47 pistons. pedal doesn't go to the floor with this set-up vs the 15/16" during hard breaking, but still nothing to feel good about. if i could do it over i'd never use a factory type caliper.
I have the same set up. Looking to replace the front brake hose. What length are yours.I have a setup pretty close to this in THIS car:
View attachment 1169362
View attachment 1169363
View attachment 1169364
15/16" manual master cylinder, Aspen/Volare 2.75" single piston front calipers and 10" drum brakes with unknown size rear wheel cylinders. It stops quite well.
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Edit...The rear brakes are from a 1987 Chrysler Fifth Avenue. A Rock Auto search stated that they are 15/16" size.
Thanks for the info.about 16" they came with the kit that the PO installed before I bought the car.
My current setup (the way it was went I bought it) is....8" dual aftermarket (china) booster/ with a 1.125" MC, 10.9" rotors, 2.75" slider calipers, All new hoses. an adjustable pressure valve to stock 10" drum brakes that have 15/16" wheel cylinders.
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The car has a very Hard pedal. The car will stop, but not fit to drive safely. I'm going to do more checks on the booster ( I have 17"-18" of vacumm ). But I know that the 1.125" MC bore can not be helping my problems ! The car is a 62 Plymouth Fury wagon.