Power brakes booster replacement

[Higgins56]

Hi,

to install the hydraulic clutch linkage on the firewall is impossible because of the original big diameter brake booster.

Is there an alternative to replace the original with a smaller diameter booster to get the clutch linkage master cylinder under it ?

I have original vented disc in the front and 11 " drums at the back.

 

[oh dam]

I went with a hydro-booster. might want to get that too.

 

[Higgins56]

I went with a hydro-booster. might want to get that too.

hmmmm…. can you tell me more - is a new thing to me !

 

[Don C]

They run off pressure from the power steering pump. They have been around many years and aren't much bigger than the master cylinder, and mount between the master cylinder and firewall. There are a few manufacturers of retrofit systems, here's one: http://www.hydratechbraking.com/tech.html

Some people have pulled them from donor vehicles and replaced the vacuum booster with used units. Because of the importance of brakes I would be cautious about trying this.

 

[wwhite72]

Check Moderndriveline in Idaho for info on hyd clutch install with power brakes. I havent asked them that question, but they make full set ups and have figured out every oher problem, so could be a source to solve your problem. They make all sorts of custom brackets and lines and stuff.

 

[oh dam]

I went with a hydro-booster. might want to get that too.

hmmmm…. can you tell me more - is a new thing to me !

Like someone said it runs off the pressure from the power steering pump. I think its a chevy part, i was told that. if you want PM me i can give you some info

They run off pressure from the power steering pump. They have been around many years and aren't much bigger than the master cylinder, and mount between the master cylinder and firewall. There are a few manufacturers of retrofit systems, here's one: http://www.hydratechbraking.com/tech.html

Some people have pulled them from donor vehicles and replaced the vacuum booster with used units. Because of the importance of brakes I would be cautious about trying this.

I havent had any issues with the hydro, and ive had some pretty close calls.

 

[mdan575]

Hydraboost is an awesome upgrade from any vacuum booster design. It significantly raises brake line pressure and the clamping load at the caliper. That said these old cars were not designed with such high pressures in mind. I would be a little worried it could aggravate other issues if the rest of the system isn't up to the task.

The Chevy Astro Van booster is the common module I have used in the past with great luck. Don't get hung up on the Chevy or Ford thing. Only a few companies produce them. So the same hydroboosters are used on a lot of vehicles.

Tallonhydraulics.com is a great place to get adapter parts also.

 

[Higgins56]

Hydraboost is an awesome upgrade from any vacuum booster design. It significantly raises brake line pressure and the clamping load at the caliper. That said these old cars were not designed with such high pressures in mind. I would be a little worried it could aggravate other issues if the rest of the system isn't up to the task.

The Chevy Astro Van booster is the common module I have used in the past with great luck. Don't get hung up on the Chevy or Ford thing. Only a few companies produce them. So the same hydroboosters are used on a lot of vehicles.

Tallonhydraulics.com is a great place to get adapter parts also.

THank you all of these comments.

In my case all elements in the braking system are refurbished - but according to the original standards - not todays standards.

If that is sufficient to comply with the hydraulic booster - then why not to consider it.

 

[Don C]

The hydraboost brake line pressures are about the same as a vacuum booster and use the same kind of brake components. One thing about Astro vans is that they have metric fittings.

Ford started using them in the '70s in T-birds and Lincoln's and I believe they have US fittings. You can get one from NAPA for around $180.

 

[mdan575]

The hydraboost brake line pressures are about the same as a vacuum booster and use the same kind of brake components. One thing about Astro vans is that they have metric fittings.

Ford started using them in the '70s in T-birds and Lincoln's and I believe they have US fittings. You can get one from NAPA for around $180.

Thats not the results that truckin magazine got when they did a hydroboost conversion. Stock vacuum booster for them on an 01 Chevy truck was only getting a maximum of 700psi pressure. After the conversion they were seeing pressures as much as 2k psi. Not a Mustang but I would say the results should be comparable.

http://www.truckinweb.com/tech/1112tr_2004_hydratech_power_assist_unit_boost_brakes/

 

[Don C]

A properly designed and operating manual brake should provide a minimum of 1,000 to 1,200 psi, power brakes much higher. I suspect they had a bad booster to start with.

 

[mdan575]

Still not 2k PSI line pressure. While I understand the wear and tear that occurs with time. They tested an old vehicle for todays standards not a classic by our cars. Its still a 2001 truck, what I would like to see the pressure of one of our cars tested. The difference is significant from vacuum to hydro. I can say from experience that the conversion to hydroboost from my experience follows the findings in the article.

 

[oh dam]

The only problem that i had was i had to replace the rear brake line that mounts onto the axle, that blew out, all the other hoses have been replaced prior to hydro boost. I am running Wilwood 4p brakes in the front drum in the rear with steel braided hoses. As far as the hydroboost, I would stay away from rebuilds, i have one and i am not 100% satisfied but it does brake really well. Dont know much about the pressure, but i do know that it brakes better than a vacuum booster, and if you decide to run any big cam, vacuum will be useless, which is why i went with a hydro. But also expect to replace the power steering pump to compensate for extra usage. I didnt replace mine, but might in the future, and the gearbox as well.

 

[Higgins56]

The hydraboost brake line pressures are about the same as a vacuum booster and use the same kind of brake components. One thing about Astro vans is that they have metric fittings.

Ford started using them in the '70s in T-birds and Lincoln's and I believe they have US fittings. You can get one from NAPA for around $180.

Thats not the results that truckin magazine got when they did a hydroboost conversion. Stock vacuum booster for them on an 01 Chevy truck was only getting a maximum of 700psi pressure. After the conversion they were seeing pressures as much as 2k psi. Not a Mustang but I would say the results should be comparable.

http://www.truckinweb.com/tech/1112tr_2004_hydratech_power_assist_unit_boost_brakes/

I wonder what is the design pressure for the original Mustang brake system and what kind of pressures the original vacuum booster can do ?