Hydroboost Mounting Plates

[Will206]

Originally Posted by Captainfab

All you need is a factory hydroboost mounting plate for a '73-'86 C/K or a '87-'91 R/V truck, Suburban or Blazer. Then just remove the factory '99 mounting bracket and install the earlier one. As for connecting to the pedal, some fabrication may be needed. I'm not sure as I have not done anything like this. It would likely be a whole lot easier to just get a '73-'86 C/K or '87-'92 R/V hydroboost and bolt it up.

I'm kinda limited in terms of selection, I'm out in the middle of nowhere South Dakota, so my primary resource is the internets. I sourced that unit on eBay for $99 bucks, in an effort to save a bit. I'm not too concerned about the pedal situation, I'm going to thread the rod and put an adjustable linkage to the pedal, I may have to modify its connecting location as well because I think the geomtry is a bit different.

I've never seen the bracket for sale by itself, which I think would look like this:

https://imgur.com/a/HUH6U

I could buy the pump with the plate for $180+$60 core+ I'd still need the proper res and I think the pedal is still wrong so I'd have to modify that or replace it as well.

If you happen to know where to locate a plate like that, awesome. Otherwise perhaps you could just sell me the plate and the bracket sans mounting holes, I could drill them myself.

[Captainfab]

Yes that is what the correct mounting plate looks like. Have you checked the '73-'87 classifieds here on the forum for a hydroboost? If you were to purchase a rebuilt hydroboost for a '89 V2500 from your local auto parts store, it should come with the bracket.

Of the 3 standard booster brackets I make, I don't know if any of them would work in your application. I do not drill any holes. All of my parts are CNC laser cut, which includes all the holes.

Originally Posted by Will206

I'm kinda limited in terms of selection, I'm out in the middle of nowhere South Dakota, so my primary resource is the internets. I sourced that unit on eBay for $99 bucks, in an effort to save a bit. I'm not too concerned about the pedal situation, I'm going to thread the rod and put an adjustable linkage to the pedal, I may have to modify its connecting location as well because I think the geomtry is a bit different.

I've never seen the bracket for sale by itself, which I think would look like this:

https://imgur.com/a/HUH6U

I could buy the pump with the plate for $180+$60 core+ I'd still need the proper res and I think the pedal is still wrong so I'd have to modify that or replace it as well.

If you happen to know where to locate a plate like that, awesome. Otherwise perhaps you could just sell me the plate and the bracket sans mounting holes, I could drill them myself.

[Captainfab]

Here is a truck with a complete hydroboost unit, master cylinder and all. You could likely get everything you need from this one source.

http://www.67-72chevytrucks.com/vboa...d.php?t=700334

[Classic v6 GMC's]

So will this bracket work with a 2000 GMC 2500 hydroboost unit?

A friend is swapping a 6.0 and 4l80 out of a 2000 GMC 2500 into his 1971 El Camino and the GMC has hydro boost. I am trying to help him figure out if we can make it work.
Thanks, Andy

[Captainfab]

All GM hydroboost units that I have seen are all the same once you remove the factory mounting bracket. So yes, this hydroboost mounting plate will work on a 2000 model year hydroboost once the factory bracket is removed. As for mounting it to the '71 El Camino firewall, you will either have to open up the center hole and drill holes for the mounting plate, or fabricate a booster bracket similar to what I make for the '60-'72 trucks.

Originally Posted by Classic v6 GMC's

So will this bracket work with a 2000 GMC 2500 hydroboost unit?

A friend is swapping a 6.0 and 4l80 out of a 2000 GMC 2500 into his 1971 El Camino and the GMC has hydro boost. I am trying to help him figure out if we can make it work.
Thanks, Andy

[Classic v6 GMC's]

Originally Posted by Captainfab

All GM hydroboost units that I have seen are all the same once you remove the factory mounting bracket. So yes, this hydroboost mounting plate will work on a 2000 model year hydroboost once the factory bracket is removed. As for mounting it to the '71 El Camino firewall, you will either have to open up the center hole and drill holes for the mounting plate, or fabricate a booster bracket similar to what I make for the '60-'72 trucks.

I was thinking that we can mount it to his stock power brake booster brackets.

Please PM me total for the hydroboost plate and special socket along with Paypal info and I will get you paid.
Thanks,
Andy

[Classic v6 GMC's]

Parts arrived today. Quality parts and great packaging!!

[BBPanel]

What determines the HB pedal rod displacement distance? Does the m/c dictate that or does the HB pedal rod have its own unique travel length? Would seem like the m/c should be the determining factor - I'm retrofitting a HB and need to determine what my pedal travel should/needs to be. -Bob

[Will206]

Originally Posted by BBPanel

What determines the HB pedal rod displacement distance? Does the m/c dictate that or does the HB pedal rod have its own unique travel length? Would seem like the m/c should be the determining factor - I'm retrofitting a HB and need to determine what my pedal travel should/needs to be. -Bob

I haven't a clue to be honest. I replied to the guy Capitanfab said had one but I haven't heard anything back, right now I am planning on using the rivited bracket off my old booster and a hydroboost mounting plate. I will then cut the end off the HB pedal rod, thread both halves and use a adjustable type linkage in between. Possibly off something like a turn buckle, but add jam nuts. I still have to figure out the *actual* angle of the rod because I know the HB units generally connect a little higher on the pedal. I was really hoping to find just a HB brake pedal but haven't had any luck yet.
Posted via Mobile Device

[Will206]

Here is a custom setup from http://www.custompowerbrake.com/: http://i.imgur.com/fKY8Kcp.jpg

[Captainfab]

Sorry but I'm not understanding what you mean by 'pedal rod displacement distance'? As for connecting the hydroboost pushrod to the brake pedal, you will probably want something in the neighborhood of a 4:1 ratio.

Originally Posted by BBPanel

What determines the HB pedal rod displacement distance? Does the m/c dictate that or does the HB pedal rod have its own unique travel length? Would seem like the m/c should be the determining factor - I'm retrofitting a HB and need to determine what my pedal travel should/needs to be. -Bob

[BBPanel]

Originally Posted by Captainfab

Sorry but I'm not understanding what you mean by 'pedal rod displacement distance'?

When you apply the brakes how far does the HB pedal rod move before it bottoms out - or will the m/c bottom out first?

[Captainfab]

I do not have that answer. I have not installed a hydroboost yet and I do not have an operational one to measure. I am not in the business of working on cars and trucks for others and no time for any of my own with working 80 hrs a week.

Originally Posted by BBPanel

When you apply the brakes how far does the HB pedal rod move before it bottoms out - or will the m/c bottom out first?

[juddss]

Posting so I can find thread again. Looks nice

[YOLO]

Captainfab.
Here are the pictures of my hydroboost from mcgaughys. I also included pictures of my 64 c10 fire wall. Do I buy your bracket, unbolt the bracket on my hydroboost, bolt your bracket on, then mount it to the fire wall? Or do I just use the bracket that came with my hydroboost and re drill it to match the fire wall? I just installed your PS adapter plate and worked out perfect. Thank you.

[doublebeetx]

The picture you posted isn't a hydroboost, that is power brakes via vacuum. You simply bolt that to the firewall as you have it. Hydroboost uses hydraulic pressure via the power steering pump, not vacuum.

[YOLO]

Originally Posted by doublebeetx

The picture you posted isn't a hydroboost, that is power brakes via vacuum. You simply bolt that to the firewall as you have it. Hydroboost uses hydraulic pressure via the power steering pump, not vacuum.

This is part of the front disc brake kit I bought. The master cylinder bolts to it. The holes do not line up with the fire wall and I prefer not to drill the fire wall. I would rather re drill the bracket to fit the holes on the fire wall.

[Captainfab]

As stated by by doublebeetx, that is a vacuum booster noot a hydroboost. To mount that vacuum booster to your firewall you need one of my booster brackets shown in this fro sale thread.

http://www.67-72chevytrucks.com/vboa...d.php?t=339081

However I do not know what the mounting stud pattern is on that booster. You will have to check that and see if it is the same as the holes in my booster brackets.

[Budman56]

I should have known that you (captainfab) has already built a adapter plate for the hydro boost conversion. I just did this swap on my dodge cummings truck which will later become a 65 chevy cab on the dodge frame.

[Theboatandcarman]

ended up not needing the hydroboost plate. here we are

[burnitg]

Originally Posted by Curtb1971

Thanks Captianfab! Finally got the my hydro boost mounted tonight.

CaptainFab:

What is your price for the direct mount plate, in bare steel, like the one you made for Curtb1971?

Thanks,
Burnett

[Captainfab]

I'll send you a PM with ordering and payment info.

Originally Posted by burnitg

CaptainFab:

What is your price for the direct mount plate, in bare steel, like the one you made for Curtb1971?

Thanks,
Burnett

[Possmguts]

so.. with the hydroboost, I only need a direct mounting plate to keep it tight and clean to the firewall?

[Captainfab]

I will be on vacation from 08-08-16 thru 08-25-16. If you wish to make a purchase you can post here in this for sale thread, send me a PM or an email to captainfab454@hotmail.com. I will reply to your inquiry when I return on the 25th. I do currently have a list of orders to build and ship when I return but I will add your name to the list in order of when received. Thanks for your understanding.

[solidaxel]

Originally Posted by Captainfab

I made up a couple extra of the hydroboost nut sockets. The cost on these is $52.50 each plus a flat $10.00 for shipping. If purchased with a hydroboost adapter plate, the shipping for both would be $10.00 as well. additionally, if you purchase either of my booster adapter brackets along with the hydroboost adapter plate and the socket, it's still $10.00 for shipping. Plus you get $5.00 off on the hydroboost adapter plate.

Has Anyone found anymore uses for this size socket, other than the Hydro boost nut?