Delco Brake Booster, The Right Stuff Detailing and a Problem

Discussion in 'The whoa and the sway.' started by thapachuco, Feb 28, 2013.

  1. thapachuco

    thapachuco Well-Known Member

    I just bought a replacement brake booster from The Right Stuff Detailing. It says it applies to 1967 Models. When i got the booster, it had a bracket on the rear of it, held on by some rivets. This will not fit my car.

    A couple of issues

    Do i need a 9in or 11in booster?
    Does anyone know where i can get an appropriate delco moraine gold zinc plated booster for my car, without bracket?

    It is similar to this one, the bracket is pictured
    http://www.jegs.com/i/JEGS-Performance-Products/555/631150/10002/-1?parentProductId=1618168

    Thanks
     
  2. gokitty

    gokitty Platinum Level Contributor

    Pete's Muscle Cars (Pete53e) on e-bay . 11" yellow zinc plated ,made in U.S.A. $75.00 including shipping. Installed one on my '67 Monday. Looks nice. Works properly. No "Delco Moraine " stamping. @ Steve Gregori, OEM boosters did not have "Delco Moraine"stamp until 1969. Archie
     
    Last edited: Feb 28, 2013
  3. thapachuco

    thapachuco Well-Known Member

    Is this the one you are referring to?
    http://www.petesmusclecars.com/servlet/Detail?no=204

    Is there a bracket on the back of it that isn't pictured? If not, this may be exactly what i need!

    Although, B Bodies arent listed as a fitment option. This is for a 67 Lesabre Big Buick

    Thanks for the info!
     
  4. gokitty

    gokitty Platinum Level Contributor

    There is a bracket on the back side. Archie
     
  5. Redmanf1

    Redmanf1 Gold Level Contributor

    They all have a bracket. Are you going from non power brakes? If so that is why you do not have the bracket...

    Nelson
     
  6. CJay

    CJay Supercar owner Staff Member

    The boosters your looking at and buying fit a GM "A" body, not a LeSabre. I dont think they make one to fit your car. You will need to send yours out and get it restored
     
  7. thapachuco

    thapachuco Well-Known Member

    They are power brakes, i do not need the bracket... for some reason bracketless booster plated dont exist.

    ---------- Post added at 07:34 PM ---------- Previous post was at 07:34 PM ----------

    Do you know of any places that can restore and plate a booster?
     
  8. CJay

    CJay Supercar owner Staff Member

  9. thapachuco

    thapachuco Well-Known Member

  10. Eric

    Eric Founders Club Member

    There is only one place to go in my opinion...Booster Dewey here in Portland Oregon.
    He is a personal friend of mine. He knows everything there is to know about boosters!
    He's been doing them for almost 25 years.He's an honest fine upstanding fellow and
    cares about his customers.
    Tell him Eric sent you!

    GSX Eric :3gears:
     
    Last edited: Oct 13, 2013
  11. UNDERDOG350

    UNDERDOG350 350 Buick purestock racer

    There are several 9" and 11" boosters with mounting studs available.
    They would have nuts installed on the interior of the car to mount them.

    I need to know the booster diameter, number of studs, pattern and shaft lenght.

    A picture of yours would help.
     
  12. 69GS400s

    69GS400s ...my own amusement ride!

    :shock: more like you gotta pay to stop after your done playing
     
  13. thapachuco

    thapachuco Well-Known Member

    I'll look him up, thanks for the heads up!

    ---------- Post added at 09:18 AM ---------- Previous post was at 09:13 AM ----------

    The current one in my car is most likely aftermarket, since it does not have the cadmium plating (which is what im looking for)
    Since it's a big body, i believe it is an 11in diameter. I know i can get black painted ones, and at this point, in order to save a little money, i think i may go that route.

    This is the one i am most likely going to order, depending on the rebuild / replating price that Booster Dewey can offer
    [​IMG]

    Im not sure what the stud dimensions are on my car, however when i contacted A1 Cardone they sent the following measurements:
    M/C Side: mtg. 3.460

    F/W Side: mtg. H=3.37 V=3.45
     
  14. thapachuco

    thapachuco Well-Known Member

    well,

    I just installing a new master cylinder and vacuum booster, with full reverse and pressure bleed done.

    Is there a reason why the brakes are very firm when the car is off and when the car is on, they become much softer? I also noticed the brake pedal does not return to the up position very fast. As well the braking doesn't feel very grabby, its a much more gradual stop than i was expecting.

    I put on the scarebird disk brake front kit a few week back.

    Any insight?

    also, i noticed that the hole at the rear of the new master cylinder was fairly deeper than the original MC i had. Could this cause the problems im having? The piston at the end of the new booster was wide enough to hit the outer rim of the MC piston inlet.
     
  15. CJay

    CJay Supercar owner Staff Member

    The power in power brakes comes from engine vacuum. When the engine is off, there is no vacuum so the brakes would be rock hard.

    As far as the master, it needs to be exactly the same as the one you took off. If the hole was deeper than the old one, thats a problem unless the power booster had a corresponding longer actuating rod coming out of it. If the rod on the new booster was the same length as the old one and the new master had a deeper hole in the back than the old one, that is a signifigant issue.
     
  16. thapachuco

    thapachuco Well-Known Member

    Ok, so the new booster has the same actuating rod as the original, it's relatively short, however, when the brake is depressed, it comes out about 3 inches. Around the actuating rod itslef, there is a black casing that is also extruded. about 3/4 of an inch thick.

    Could i just put in an actuating rod extension like the ones supplied by the right stuff detailing?
    http://www.amazon.com/Right-Stuff-D...126&sr=8-9&keywords=the+right+stuff+detailing
     
  17. CJay

    CJay Supercar owner Staff Member

    I guess you could try it:Do No: Sounds like you just have the wrong master
     
  18. thapachuco

    thapachuco Well-Known Member

    Yea, im hoping that's all it is. I just ordered a master cylinder plug from summit racing, it is supposed to make the pocket more shallow. We will see this tuesday!
     
  19. thapachuco

    thapachuco Well-Known Member

    Update:

    I ordered the correct master cylinder with the correct push rod shaft opening, its a shallow dimple rather.

    So the MC is new and the Booster is new from A1-Cardone.

    I bled the system multiple time, reverse and pressure bled.

    I have a really slow to return brake pedal. It depresses very low when the car is running and returns to the normal position very slow.

    From what ive read, everything is pointing to a faulty booster, but when i emailed a1-cardone, this is what they sent:

    The booster is NOT DEFECTIVE. If the booster were defective, the pedal would be extremely hard even with the engine running. The fact that the booster is hard when the engine is not running is due to the fact that there is no vacuum applied. This is normal.

    If the pedal fades, it more than likely is an issue with the hydraulic system. You need to see if the pistons are sticking in the master cylinder and also be sure that all the air is out of the hydraulic system. The symptoms you are describing are all directly related to the hydraulic system.

    A sluggish pedal return could be due to swelling seals. Take the master cylinder off the booster and push the piston in and let go. The piston should immediately return to the rest position. ​
     
  20. CJay

    CJay Supercar owner Staff Member

    Did you bench bleed the master?
     

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