Roger63
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Is this the correct brake booster for a 71 roadrunner with disc and drums?
Brake Booster
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MIKESPOLARA
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That's a bendix, what MBM sells. This is what I see mostly listed for 71 RR. Might have used different brands
And drum/drum or disc/drum won't make a difference in booster only the master will be different
And drum/drum or disc/drum won't make a difference in booster only the master will be different
Roger63
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Thanks glad I asked, that picture I posted was off year 1 website. They claim its correct.
MIKESPOLARA
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I think the one I posted is a Moraine, car manufactuers often used multiple brands so either could be correct. The year 1 is a China import, which is ok as long as you don't have trouble with it. I would think you could find an original and rebuild it but that's going to cost a lot more
You need to discuss with someone that is an original owner of a 71
You need to discuss with someone that is an original owner of a 71
Was this a 'kit' you installed? Is your motor hepped up such as with a mild or more cam? I had 'issues' with my booster (SSBC kit) among other things I eventually found. The one you have pictured is a dual-diaphragm that I'd think is what you need. I played with another booster on mine going to a smaller diameter one that it didn't like, so back to the size with the kit. Boosters usually need at least around 17" of vac. I put in a reserve tank; not sure this was what I needed though was on a frustrating long hunt with brake problems and my vac was borderline. Other thing is MC compatibility with the setup.
MIKESPOLARA
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another random pic. Although the engine has aftermarket stuff on it the booster looks old by it's condition. Same one I posted above
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The Midland Ross unit as shown is correct for a 71 RR w/ disc
Roger63
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My car came with the kit on it, a dual diaphragm 7 in booster. I added a vacum reservoir to it and it carries 19 inches of vacuum. Tried another aftermarket booster same results
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If it didn't originally come on your car and you put it on. It is now the correct one for your car. ? If your car is not original then no parts will be "correct". They might fit and function but they are replacement/upgrade parts.
As said before, there have been multiple parts suppliers. Always been that way in case there is a problem with the parts or company. They always had a plan "B" for parts.
Have you looked in your Service Manual to see what they showed for your car ? Free downloads if you don't have one yet.
You post pictures from different catalogs and then ask which one is correct ? Maybe all of them or not.
Good to do research about you own car. Comes in handy .
As said before, there have been multiple parts suppliers. Always been that way in case there is a problem with the parts or company. They always had a plan "B" for parts.
Have you looked in your Service Manual to see what they showed for your car ? Free downloads if you don't have one yet.
You post pictures from different catalogs and then ask which one is correct ? Maybe all of them or not.
Good to do research about you own car. Comes in handy .
Roger63
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And I have done the research, which is why I'm asking for clarification.
The one above is not available anywhere which I have determined is correct.
I had played with a 7" a shop had to loaned me, as I was trying to track down if the booster I had (kit 8") might be bad despite all the checks I made telling me it was good. Anyway, the 7" wasn't compatible with my setup. I ended up getting another 8" for it. However, wasn't involved with a factory setup in my case.
Roger63
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Who have you tried ? Just the majors like YearOne and such ? You might find it at a regular auto parts store oor a rebuilder like Cardone.
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Cardone will probably have the Midland unit but they blast off the finish and sell them in bare metal.
The RamMan will probably have one that is re-finished if you want to deal with him.
The RamMan will probably have one that is re-finished if you want to deal with him.
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There is one on EBay that is correct. All the others on there are GM style.
https://www.ebay.com/itm/402552053716?hash=item5db9f8dfd4:g:ErMAAOSwUV9WopqO
https://www.ebay.com/itm/402552053716?hash=item5db9f8dfd4:g:ErMAAOSwUV9WopqO
Roger63
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Cardone is out of stock and my local parts stores are out also offering only a rebuild service.
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