Steering, Suspension, & Brakes

tips, technology, tools and techniques related to non-driveline mechanical components

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healey383
Donn Edlund
Elk Grove, California
(15 posts)

Registered:
12/07/2013 04:41PM

Main British Car:
1960 Austin Healey 3000 Chevy 383 Stroker

Remote Power Assist Brake Unit for AH 3000
Posted by: healey383
Date: June 13, 2015 09:52PM

I am in the process of finishing my restoration on my AH 3000 S/B Chevy. I have never liked the brakes. I have switched to a 11" front discs and rear drums. There is really no room to install a conventional master cylinder with a power vacuum unit. I have been looking at the remote vacuum servo units like the Sunbeam tiger comes with from the factory. MP Brakes has a similar set up. Does anyone have any experience with the remote units ?


IaTR6
Dennis Costello
Central Iowa
(148 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6 '97 Explorer 5.0

Re: Remote Power Assist Brake Unit for AH 3000
Posted by: IaTR6
Date: June 15, 2015 05:48PM

I know very little about them, but the Hydrovac system was used on gasoline powered trucks and I believe, some cars. You might investigate that.
-Dennis


WernerVC
Werner Van Clapdurp
Lynchburg, Va
(93 posts)

Registered:
09/06/2009 12:56PM

Main British Car:
MGB 1977 Rover 3.5

Re: Remote Power Assist Brake Unit for AH 3000
Posted by: WernerVC
Date: June 15, 2015 09:06PM

I had a Volvo Amazon from 123 GT build in1966 and that car had a remote vacuum assisted unit also. I think it was from Girling . Wished I still had the car.
Worked great.
Werner


Nexxussian
Erik Johnson
Alaska
(62 posts)

Registered:
04/20/2015 10:32PM

Main British Car:
1974, MGB, Citroen Color Rover V8

Re: Remote Power Assist Brake Unit for AH 3000
Posted by: Nexxussian
Date: June 16, 2015 02:31AM

There are several aftermarket companies that make remote brake servos (AKA "Remote Brake Booster").

The last one I bought was from Welsh Jaguar and worked excellent in the Anglia we had it in (replaced the one that was leaking internally).

Only down side I see is they only seem to come as a single circuit boost (usually the front on a dual circuit system); meaning you would need two if you wanted to boost both brake circuits on a dual circuit system.

When I bought mine it was over $400, they came down, A BUNCH!! [www.welshent.com]

You could use a hydraulic brake booster like ECI makes. [www.ecihotrodbrakes.com]

I haven't tried them, but they seem like they would work nice, If you have the length available.

They also make a whatsit they call a "Brake Pressure Multiplier" [www.ecihotrodbrakes.com] If you don't have length available.

FWIW I work for neither entity I mentioned.

I would still be running the servo, but removed it when I replaced the entire Disc / Drum system it came to us with a 4 wheel disc, dual circuit system. ;)

I donated it to a friend with a '67 Volvo Amazon Wagon, to replace his, as it was leaking internally, works great there too. :D


Orange Alpine
Bill Blue

(45 posts)

Registered:
12/20/2010 07:36AM

Main British Car:
1967 Sunbeam Alpine 2.5 Ford Duratec

Re: Remote Power Assist Brake Unit for AH 3000
Posted by: Orange Alpine
Date: June 17, 2015 05:14AM

At the risk of exposing my ignorance, I'm wondering why a conventional system could not be employed as a remote unit. The stock, single piston master cylinder would operate a slave cylinder attached to the remote booster. Most any type of master cylinder could then be used on the booster. It would require two separate hydraulic systems. At least in my simplistic mind.

Bill


Nexxussian
Erik Johnson
Alaska
(62 posts)

Registered:
04/20/2015 10:32PM

Main British Car:
1974, MGB, Citroen Color Rover V8

Re: Remote Power Assist Brake Unit for AH 3000
Posted by: Nexxussian
Date: June 22, 2015 06:40AM

It could be done, and I have seen that proposed on many forums, however it adds that many opportunities for complete failure of the brake system as any malfunction of the "primary" master, its' slave, the line between them, or any of the connections will leave you depending on your emergency brake to stop.


IaTR6
Dennis Costello
Central Iowa
(148 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6 '97 Explorer 5.0

Re: Remote Power Assist Brake Unit for AH 3000
Posted by: IaTR6
Date: August 27, 2015 11:05AM

I looked at an MGC at an auction recently, and noticed that it had two remote brake boosters, one for the front, and one for the rear. So, it isn't as if a remote booster hasn't been done, it just isn't that common. The comments about increased complexity are valid too, although look at the complexity of the modern system. Of course they are vastly more developed.
Dennis



DiDueColpi
Fred Key
West coast - Canada
(1259 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Remote Power Assist Brake Unit for AH 3000
Posted by: DiDueColpi
Date: August 27, 2015 01:38PM

What about a hydro boost system (I think that's what Dennis was referring to).
They are small and powerful. Pressure is supplied by your power steering pump.
I've used the ones from a Chevy astro van in the past. And they work very well.
I hear that they came in newer Mustangs as well as larger gm trucks.
If you don't have a power steering pump, Cadillac had an electric version for a few years.

Cheers
Fred


IaTR6
Dennis Costello
Central Iowa
(148 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6 '97 Explorer 5.0

Re: Remote Power Assist Brake Unit for AH 3000
Posted by: IaTR6
Date: August 29, 2015 12:14PM

Fred, I forgot about the hydro boost, we had one on a firetruck that had a gasoline engine rather than diesel. The unit had an electric motor
that would provide hydraulic pressure in the event of engine failure, so could be a better idea than just a vacuum booster. I looked again for hydrovac, and I needed to add "brake booster" to the term, but found examples. Anyway, off the the shop!
-Dennis


ghornbostel
Greg Hornbostel
Nebraska
(75 posts)

Registered:
09/02/2013 01:41PM

Main British Car:
1957 TR3 Buick 231 evenfire V6

Re: Remote Power Assist Brake Unit for AH 3000
Posted by: ghornbostel
Date: September 06, 2015 12:05AM

I purchased a Welsh unit 3 days ago and installed it today. It fit nicely on the RH fender well (2- 5/16" holes) and I can still change the spark plugs too. Now I have to figure out how make it more progressive in activation. It really did lighten up the pedal pressure and it will probably only be a matter of getting used to the brakes again. I'll take some photos when I figure out where I left my camera. Only two complaints. The unit came with a angle bracket and the holes that were drilled in didn't fit the unit at all. It also came with brake line and it had to be the hardest brake line I've ever worked with. I didn't need the bracket but did buy brake line extra. I also found it odd that there wasn't any instructions included although 1 vacuum connection and 2 hydraulic connections weren't too hard to figure out and also where it went in the system.

Greg


ghornbostel
Greg Hornbostel
Nebraska
(75 posts)

Registered:
09/02/2013 01:41PM

Main British Car:
1957 TR3 Buick 231 evenfire V6

Re: Remote Power Assist Brake Unit for AH 3000
Posted by: ghornbostel
Date: September 09, 2015 09:31PM

Found my camera right where I left it. Unit looks much like what Moss sells also.
000_1013[1].JPG


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