Holy Hydroboost Batman!

saxman · Nov 26, 2006

I must say that after piecing together all of the hydro boost parts, all of the time and energy are worth it! I have to agree that this is one of the best mods you can do, especially with larger tires. I have 33's.

I am running a 351W with no body lift and everything fits. It is tight, but works very well. I was surprised how easy I can stop the truck!

Unfortunately, the pump that I bought from NAPA leaks on the back. I have to take this one off and exchange it for a new one. Oh well, always something to do!

Parts for reference:
1. Fittings for hydro boost plumbing (thanks to edge4)
For a Astro unit, go to www.speedwaymotors.com and buy the following:
AN6 to 5/8" adaptor #617-4802
AN6 to 11/16" adaptor #617-4805
AN6 to 16mm adaptor #617-4806
AN6 to 18mm adaptor #6174808

2. Power Steering Pump with 2 return lines – 1977 Lincoln Mark V – Napa # NSP208606

3. 1980 MC – 1980 Chevy Camaro – Napa # 101612

4. 2 high pressure lines with 6 AN fittings. Both hoses have 90 degree bends on the ends of them.

5. Angled bracket off of eBay

6. Wild horses power steering pump bracket. I had to grind this down to work. I think BC Broncos requires no grinding at all.

7. Brake line adapters. 2 for the MC and one for the proportioning valve. These adapters were needed to use 3/16 brake lines with their respective fittings on the ends.

kntr · Nov 26, 2006

Nice write up.

Tito · Nov 26, 2006

Exactly what I needed, thanks to you and edge4 for the info. I am getting ready to do the same thing and have everything but the hoses and adapters.

How do you plumb the whole setup...diagram please between box, pump and hydro? Thats all I need with this info, I am doing power steering and hydro all at the same time, those boggers are a booger to turn. Is that a stock box you are using?

Thanks again, cant wait!

thegreatjustino · Nov 26, 2006

Hope this helps

Tito · Nov 26, 2006

Perfect, you guys totally rock! Anybody know the size of the fittings on the 4x4x2 box (78 Bronco) box? Are they the same as the EB?

SaddleUp · Nov 26, 2006

Josh, If you have lines made go to Oil Filter Service in SE Portland. They are down at about 7th. and Hawthorne. They are an Aeroquip ditributor and can build the power steering line with interchangeable ends so you only need to have an extra chunk of hose to repair it on the trails if it ever fails. (Mine is still holding up well after 2 years)

Tito · Nov 26, 2006

Should I just take my pump, box cooler and hydro all in (with some approximate measurements?

kntr · Nov 26, 2006

Gotta love this site.

saxman · Nov 26, 2006

PDXBronco said:
Exactly what I needed, thanks to you and edge4 for the info. I am getting ready to do the same thing and have everything but the hoses and adapters.

How do you plumb the whole setup...diagram please between box, pump and hydro? Thats all I need with this info, I am doing power steering and hydro all at the same time, those boggers are a booger to turn. Is that a stock box you are using?

Thanks again, cant wait!

1. 18mm hydroboost/AN fitting to power steering pump high pressure out/AN adapter
2. 16mm hydro/AN fitting to steering gear box input/AN adapter
3. hydroboost return to power steering pump return
4. gear box out to power sterring pump return (stock hose)

SaddleUp · Nov 26, 2006

PDXBronco said:
Should I just take my pump, box cooler and hydro all in (with some approximate measurements?

That should work. I took old lines with me but they could build them using the components as well. You really only need 2 lines built. The one from the pump to the booster and the one from the booster to the gear. The remaining 2 lines are common low pressure return lines I.E. You just need a return line for each of the matching components (booster and box). The pump end for each can just be pushed on and clamped with a hose clamp.

toddz69 · Nov 26, 2006

PDXBronco said:
Perfect, you guys totally rock! Anybody know the size of the fittings on the 4x4x2 box (78 Bronco) box? Are they the same as the EB?

The 4x4x2 box has 1/2-20 pressure and 5/8-18 return.

Stock EB box is 11/16-18 pressure and 5/8-18 return.

Todd Z.

Pa PITT · Nov 26, 2006

do you have disk on front or are you running this with you old drum stuff..

Broncos n' VWs · Nov 26, 2006

Looks just like mine! Good job, Saxman! I will be doing a 351 W swap a few months down the road and it looks like you have just enough clearance between the brake bracket and the valve cover. That is good news to me.
Isn't it nice having hydroboost?

slcpunk · Nov 26, 2006

does that master cylinder work with 4 wheel disc or just up front?

eb66to77 · Nov 27, 2006

The '80 Camaro master cylinder is for disk/drum setup. Use the '80 'Vette master cylinder if you are using a GM hydrobooster. If you are using a Ford booster, use a master cylinder for a '75 Thunderbird with four wheel disks. I used the T-bird master cylinder before I went hydroboost.

Th above diagram from Thegreatjustino is a helpful one but has a few things missing that were key for me to understand the whole setup which is why I photoshopped it into this ugly one.

JKrieg70 · Nov 27, 2006

Very nice. Have fun making skid marks pulling into your driveway!

slcpunk · Nov 27, 2006

does the vette and camaro mc just bolt right up to the astro hydroboost? what years of mc

saxman · Nov 27, 2006

Broncos n' VWs said:
Looks just like mine! Good job, Saxman! I will be doing a 351 W swap a few months down the road and it looks like you have just enough clearance between the brake bracket and the valve cover. That is good news to me.
Isn't it nice having hydroboost?

It is tight. I have roller rockers and so I had to use tall valve covers. I did have to grind the brake booster bracket a little to give so more clearance.

eb66to77 · Nov 27, 2006

slcpunk said:
does the vette and camaro mc just bolt right up to the astro hydroboost? what years of mc

'80 Vette/Camaro MC will bolt to an Astro Booster. Can't remember all of the years but the applicable ones will come up when you ask for that year. Camaro is for drum rear, vette is for disc rear.

Dan's73 · Nov 27, 2006

Sorry for the ignorance, but the firewall bracket looks a whole lot like the bracket for a typical vacuum booster...is that what it is, modified to accept the hydroboost parts?

Holy Hydroboost Batman!

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