oldmanbob
New Member
Thank you, I will check Rock Auto out. What a great solution if it works out! Appreciate it.
Wrong brake booster? Holes dont line up
- Thread starter oldmanbob
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oldmanbob
New Member
I took the old one out of the car and gave it to an auto parts store for their inclusion in the weekly pickup of all the cores collected during the week for rebuilding. I had bought my wrong one online and the cost of shipping it to the seller was way more than the core charge. I couldn't see just dumping it in a landfill. In the intervening years the supply of remanufactured boosters has apparently largely dried up. Lesson learned, check your new parts for fit and completeness, etc., when they arrive, not five years later when you actually get around to installing them. I tend to learn things the hard way.
oldmanbob
New Member
Thank you!
oldmanbob
New Member
Do you know if the plunger thing connecting to the brake pedal on your New Yorker connects straight to the pedal, or is there a linkage thing? What a great car to have.
oldmanbob
New Member
I pulled the trigger and ordered it. When it gets here we'll see if the mounting holes line up, if the plunger thing's loop on the end is the right diameter for the brake pedal mounting bolt, and whether the brake pedal ends up in the right position. If these stars align, woo hoo! Thanks for noticing that that one was available. I can't believe this vintage of the c bodies is entering the land of "ancients", where you can't readily get run of the mill stuff like brake boosters. It's a '69 Plymouth, not a '43 Talbot Lago Emperor or something, jeez!
oldmanbob
New Member
Hey Big Mopar - I just want to say thank you for your suggestion. I did find the booster you referred to at Rock Auto, and it arrived today. The mounting holes line up on my 69 Fury, and the brake plunger/actuator thing has the right sized hole to bolt up with the brake pedal. So thank you very much. Your suspicion that this booster would work was right on. Take care, Bob
Sixpactogo
Well-Known Member
I would not use a single diaphragm booster with front discs. Disc's require about twice as much PSI as drums do. That is why Mopar upgraded to the dual diaphragm. You could get by with the single but you won't be able to lock the front brakes. There are tons of threads out there dealing with this. Read up on it. Brakes are one of the worst things you should be miss-matching parts on.
bigmoparjeff
Senior Member
1971 and newer cars came equipped with a large diameter, single diaphragm booster with disc brakes, which can be used on earlier cars. The dual diaphragm booster is needed on slab cars to clear the shift linkage on the column.
The booster in question is the '71 and up disc booster. Since his car is a 1969 fusey, there's no clearance issues. You can safely swap this booster for the dual diaphragm Bendix.
Jeff
Sixpactogo
Well-Known Member
I agree that if you have the room, a single 9" booster could give you 572psi of force. That plus a master cylinder with a 1" bore adds another 400 psi.
Considering disc brakes need at least 900psi, you should be good.
A single 8" booster gives you about 400 psi. That plus the 400 psi from the master only gives you around 800 psi. Plenty for drums but not quite enough for discs on a 4000+ lb car.
Considering disc brakes need at least 900psi, you should be good.
A single 8" booster gives you about 400 psi. That plus the 400 psi from the master only gives you around 800 psi. Plenty for drums but not quite enough for discs on a 4000+ lb car.
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