Re: Hydroboost Mounting Plates
 

Looks like this is the way I want to go. So, what year Astros use the HB? Are they all disc/drum and is that master appropriate for a disc/drum C10? Where is the prop valve on the Astro? Probably different threads for the brake lines huh? My current set is was manual drum/drum and I've done a front disc swap. Any old pump will work if you tee the return lines?
Thanks!

Re: Hydroboost Mounting Plates
 

I believe all Astro/Safari vans had the hydroboost except for the first few years. I'm pretty sure from '90 and up would have them. Pull and Save usually has several Astro/Safari vans. I don't remember just where the prop valve is. I'm thinking it is right next to the master. One of my customers is using the Astro master on his pickup. Seems to work fine. Yes you can use a standard pump and just tee the return lines.

Here are some pics and info on the Astro/Safari master in Bubba327's thread

http://www.67-72chevytrucks.com/vboa...365170&page=17

Re: Hydroboost Mounting Plates
 

so why do you need an adapter to put a hydroboost on the 60-66?

67 pic -- Hydroboost Mounting Plates
 

http://67-72chevytrucks.com/vboard/s...d.php?t=175714




Sounds like a good deal from captainfab.

Re: Hydroboost Mounting Plates
 

These hydroboost adapter plates are a direct fit you any of my booster brackets. There are some OEM hydroboost mounts that alse have the same pattern. My booster brackets are a direct bolt on for the given application, so you do not have to drill any holes in your firewall. The only modification you will have to make is to lengthen the pushrod. There are a few pics in the link posted above.

Re: 67 pic -- Hydroboost Mounting Plates
 

Thanks for posting that link. Some good info there :)

Re: Hydroboost Mounting Plates
 

oh ok so your kit just makes less of a hassle put on so say a disc/disc hydroboost on very awsome and the price well i have not found anything with that good of price. :metal: because i cant remeber what year of hydroboost. but i know the hydroboost we put on are 66 is a drum/disc hydroboost and it just bolted right on the only thing we had to do was alittle modding to the push rod i dont have any pictures oh how my dad and me modded the pushrod nor do i remember but i do have the pics of it bolted up.

Attachment 890390

Attachment 890391

Re: Hydroboost Mounting Plates
 

I have never seen a hydroboost with a factory bracket like that. What is the application for it? If that is what you have then you don't need either of my brackets. Just like there are some factory hydroboost brackets that bolt directly to my booster brackets. This hydroboost mounting plate is not need in those instances. My brackets are designed to be used with brake components that are readily available at most wrecking yards.

Re: Hydroboost Mounting Plates
 

Hey Captain, I picked up a refurbished 93' Chevy hydroboost. The plate was removed but the nut is in place. I was interested in picking up your plate but had a question. If I just go with the plate and mount it directly to the firewall do I still need to lengthen the rod? I know mounting it to the firewall requires opening the hole and drilling new holes for the plate.

Re: Hydroboost Mounting Plates
 

I can't say for sure if you will have to lengthen it or not. I would say more than likely you will.

Re: Hydroboost Mounting Plates
 

How do I go about purchasing the plate? I will skip the bracket so I can keep it close to the firewall. Can you confirm the correct fittings for the hydroboost. I believe they are o-ring fittings in sizes M18-1.5 & M16-1.5

Last year I converted my existing PS lines to 6-AN TFE with flare fitting adapters. I figure all I need now is two hoses and two 0-ring to -6AN fittings.

Re: Hydroboost Mounting Plates
 

To make a purchase, you just need to make the payment. I will send you a PM with the details.

As for the fittings, I don't recal for sure......that sounds about right. There is a seller on ebay that sells all 3 hydroboost fittings to adapt to -6AN for about $24.00.

Re: Hydroboost Mounting Plates
 

The company is calles Sweet Performance Products ....

From the eBay listing

"Hydroboost -6AN fitting kit"

This auction is for one compete set of 3 fittings.

This kit includes the following fittings, -6 to M16-1.5 bump tube, -6 to M18-1.5 bump tube and -6 to 5/16-24. This will allow the use of -6 AN stainless steel braided hoses including the low pressure bleed port. The fittings are steel with an attractive zink plating.

NOTE:: The pump is not included. This sale is for the fittings only.

Check our store for power steering hose kits.

We also build all kinds of custom hoses including DOT stainless steel brake hoses.

These parts were made in house by an American.

Re: Hydroboost Mounting Plates
 

I am going to buy those same fittings. One thing that I do not know yet because I have not gotten them yet is about the diameter of the hole in the 5/16 fitting. This has to be the same diameter as the stock nipple had or it can lead to instability in the system from what I have read from people who have done a ton of these. It probably already is but would be something worth checking out. Otherwise it is a good idea to drill it out.

Re: Hydroboost Mounting Plates
 

Interesting point. At a minimum, I would think the diameter matches the side being adapted (5/16). Any smaller would restrict flow. I'm betting some smart engineer designed them to support the proper flow.

I ordered the Ebay fittings this morning. I still need the TFE hose and 90 degree 6-AN fittings. I plan to flip the hydroboost so the fittings are on the bottom. I think that would make for a cleaner install. Does anyone know if flipping it will cause a problem?

Re: Hydroboost Mounting Plates
 

Nope will not cause any problems. A lot of people flip them. Heck some of the aftermarket companies like for Corvettes ONLY have them upside down. I think that I am going to flip mine too

Re: Hydroboost Mounting Plates
 

Thanks for posting more details mcmlxix :)

Re: Hydroboost Mounting Plates
 

This morning I mounted the hydroboost using John's booster bracket and plate. I still need to reroute the high pressure line but you get an idea of how it looks. As you can see I flipped it so the fittings are on the bottom. The stainless TFE hose and ends came from Summit. I have around $300 in the setup (not including the master cylinder).

I took a test drive around the block. From the time I stepped on the pedal I could feel the difference. The brakes feel like my newer cars. It will certainly takes some getting used to.

Thanks John for an excellent product and super speedy shipping.


http://i965.photobucket.com/albums/a...-56-27_468.jpg

Re: Hydroboost Mounting Plates
 

That looks good!

Re: Hydroboost Mounting Plates
 

I agree, that looks real good :thumbs:

Thanks for posting pics of your installation Joseph :)

Re: Hydroboost Mounting Plates
 

I've got to ask, how did you piece this together for ~300?

What I am seeing:

Booster ~150
Cptn Brackets & Plate ~70
Lines ~220

Where did you save? I am planning on doing exactly as you have except painted semi glass black.

Re: Hydroboost Mounting Plates
 

Refurb Booster on Ebay ~ $120 w/shipping
Cptn Brackets & Plate ~ $70
Lines ~ $110 (includes four -6 AN TFE fittings and 6ft of TFE hose)
Hydroboost Fittings on Ebay ~$28 w/ shipping

That comes out to $328. There were other nominal cost such as a barb T fitting from Home Depot and hose clamps. To save costs I only used the teflon for the high pressure lines. The return line is regular stainless hose. I had an extra piece left over from an earlier project. That stuff is pretty cheap (6ft @ $25). You could save there by using 3/8" rubber hose. In the end I had leftover fittings. That's because I converted my PS lines to TFE last year and the high pressure line off the PS pump was long enough to reach the booster. So in all I have closer to $350 invested. That includes the fittings below.

Re: Hydroboost Mounting Plates
 

Awesome! Thanks. The hoses are the biggie. I have seen the reman pumps too, was just planning to buy new for the extra $20.

As it turns out if I am not mistaken I only need one line. I converted mine over to TFE on both lines due to my March kit. So I just need to T and connect the low pressure and make one more high pressure TFE for the second line.

Still need to make it to an event and see your truck.

Re: Hydroboost Mounting Plates
 

I am curious as to what application you guys are looking under for the rebuilt or new hydroboost units?

Re: Hydroboost Mounting Plates
 

I have just been searching GM or Chevy hydroboost.

Examples:

New, $145: http://www.ebay.com/itm/251050904964...#ht_500wt_1378

Reman, $120: http://www.ebay.com/itm/200726546898...#ht_500wt_1144

Re: Hydroboost Mounting Plates
 

I pretty much did the same thing and looked for mid to early 90s units. Settled on one from a 93' Chevy Truck.
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Re: Hydroboost Mounting Plates
 

I wonder if there is a huge difference between them and the ones on the newer (99+) Tahoes and Silverados? Those are much easier for me to find.

Re: Hydroboost Mounting Plates
 

IIRC from reading other Captnfab threads, the mounting hole spacing differs in later years, I could be wrong.

Re: Hydroboost Mounting Plates
 

I have one from a 2005 GMC 2500HD, but I'm also using the master from the same truck. I picked up a Wilwood proportioning valve 260-11179. I went this route because I have a 4 wheel disc brakes with dual piston calipers on all 4 corners.

Re: Hydroboost Mounting Plates
 

In terms of MC and P.Valve I'll be using the MCPV-1 from CPP. Combine the two in a pretty sleek package, as seen above in AusTex68's truck.

Re: Hydroboost Mounting Plates
 

I'm running 4 wheel disc brakes (95' Camaro rear calipers/stock 72' front calipers) with the CPP MCPV-1. I feel my braking is almost too good. It actually took a little getting used to. It's great now that I'm trained :)

I can't imagine the braking with dual piston calipers.

Re: Hydroboost Mounting Plates
 

As far as I am aware the mounting hole spacing does not matter as you are going to take off the mount from the Silverado and use Captfab's adapter to adapt directly to the mount.

I think this is close to the route that I plan on taking. I do kind of wish that I could some how adapt all of the 1500 6 lug brake components to my C10. I know you can do that on the front... but the rear would be cool too. I might have to take some stuff apart and see what I come up with.

That is good to hear!

Re: Hydroboost Mounting Plates
 

Ditto, good to hear. My rear Wilwoods should be in today or Monday (front's are already installed). After learning how easy it was to do hydroboosted brakes I couldn't bring myself to let it be vacuum assisted, after putting such good components on elsewhere.

Re: Hydroboost Mounting Plates
 

That is correct. It does not matter what the factory mounting bracket is like. That can be removed and my hydroboost mounting plate installed. To my knowledge all the hydroboost units themselves have the same threaded 'stub' on the back.

If you want 4 wheel disc brakes, you can use the '88-'98 light duty C2500 front spindles and rotors, and assorted other pieces as described in the 'Disc Brake Upgrade Thread'. For the rear, you can use my 6 lug rear disc brake brackets for use with 15" wheels. These use the same calipers as would be on the front of the '88-'98 C1500 or light duty C2500.

Here's a link to those rear disc brackets

http://www.67-72chevytrucks.com/vboa...d.php?t=494411





Thanks guys for posting the links and info on your sources for the hydroboost units.

Re: Hydroboost Mounting Plates
 

I was referring to the later 99+ brakes, but I have given that option some thought as well. I work in a late model salvage yard so those parts are easier to come by then the 98 back parts. I wonder if the 99-07 brakes fit on the 98 back spindles like the 07+ brakes work on the 99-07 spindles....? May have to mock that up but that's another thread all together.

Re: Hydroboost Mounting Plates
 

That was insanely fast. I paid what, Thursday? Arrived today.

Re: Hydroboost Mounting Plates
 

I always try and ship by the next day, and USPS Priority Mail is pretty fast.

Re: Hydroboost Mounting Plates
 

Captain,

Received my adapters yesterday. They look great! Thanks again.

Re: Hydroboost Mounting Plates
 

I have to say, if anyone is on the fence, jump on over. John is fantastic. We had a screwup, due to my lack of communication on what year truck I'm building. He had new brackets out to me in less than 72 hours. Even though it was clearly my fault, John being the great guy he is assumed some of the blame and we worked out getting the wrong brackets back and getting powdered ones (originally purchased bare) to me (again VERY quickly) since I had shot my last round of epoxy already. I couldn't have asked for a better experience, short of being clear and getting the right stuff out the first time.

I haven't yet mounted them up, but they look great. I'll post pics, and will have a separate writeup on everything for folks interested.

It took a bit of work and help from other members to get all the right stuff in play to get the total solution in my shop. For I believe a bit under $400 I got everything including plates, hydro unit, fancy-schmancy stainless lines and fittings etc. Will send the link to John once writeup is done for sharing with others as he sees best fit.

Re: Hydroboost Mounting Plates
 

Thanks for the kind words guys :D