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#1 |
New Member
![]() Join Date: Sep 2023
Location: Sunol, CA
Posts: 13
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Converting to hydroboost
I have a 71 C10, disc, drum with vacuum power assist.
Would like to convert to hydoboost. I was hoping to keep the master and proportioning valve. Which unit is best? There are so many out there it gets confusing. Thanks Tim |
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#2 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,509
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Re: Converting to hydroboost
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Here is what I did on my Dually project. http://67-72chevytrucks.com/vboard/s...829820&page=12 Starts with post #284 and goes off and on to about 303. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#3 |
Senior Member
![]() Join Date: Dec 1999
Location: Southern California
Posts: 2,811
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Re: Converting to hydroboost
Purchased a unit from Vanco myself. Came with all the hoses and fittings. Main reason I used them is they have experience porting the hydroboost units for use with a steering ram and high volume pump like I am using (5 gpm). I modified the mounting a bit for a direct fit to firewall without an adapter plate and adjusted the hole for connection of stock push rod to my pedal arm. Do not want any hap hazzard weak aftermarket parts there. Adapting parts may take customization. Mechanical ability is definitely required in many circumstances.
I used a later model (2006) master and adjustable prop valve for my disk/disk setup. 57taskforce used a stock master on his conversion, maybe contact him for some info.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
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#4 |
Registered User
Join Date: Apr 2022
Location: Moorpark, CA
Posts: 758
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Re: Converting to hydroboost
OP, if your motor makes low vacuum, around 12hg, consider going with a 9" dual diaphragm booster. I got the Tuff Stuff one. Brakes are excellent now.
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#5 |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,393
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Re: Converting to hydroboost
My hydroboost is out of an 09 silverado, it uses the factory power steering pump, master cylinder, and proportioning valve.
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's |
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#6 |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,491
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Re: Converting to hydroboost
Educate me here. Is there a reason for converting to hydroboost on a C10 or even C20 other than low vacuum created by a big cam?
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#7 |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,491
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Re: Converting to hydroboost
Hard to beat a dual 9" booster. 34% more diaphragm area than stock 11". We used to have a member here who sold complete dual 9" kits, but I haven't seen posts by him in a while. Seemed like he used quality components, too.
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#8 | |
Senior Member
![]() Join Date: May 2012
Location: Scottsdale, AZ
Posts: 1,906
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Re: Converting to hydroboost
Quote:
I used everything off a 1986 k3500 diesel, so the master already matched the booster, nothing to fuss with. I did a brake pedal mod and re-drilled the rod mounting hole on the pedal. The best system is subjective... unless you are talking about a turn key solution. You have options galore when it comes to choosing Hydroboost components. Good luck! ![]() J
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White K20 |
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#9 | |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,393
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Re: Converting to hydroboost
Quote:
With stock size tires on it now it will easily lock the tires up on asphalt *if* I tell it too, but at the same time the pedal overall has a better modulating feel to me than the original 3/4 ton vacuum booster ever did.
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's |
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#10 |
Registered User
Join Date: Oct 2017
Location: Grand haven
Posts: 5
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Re: Converting to hydroboost
I used the whole setup out of a 90's astro van. Works great and clears up a lot of space.
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#11 | |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,491
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Re: Converting to hydroboost
Quote:
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__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#12 |
New Member
![]() Join Date: Sep 2023
Location: Sunol, CA
Posts: 13
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Re: Converting to hydroboost
Thanks everyone for the ideas.
The reason for me to go to hydroboost is that I live on a very steep hill with four hairpin turns. They are full lock turns and, even then, one requires two stabs at it. When I leave the house I have to ride the brakes all the way down. They require a lot of pedal pressure but you have the feeling you just could not stop if you really had to. On the regular road, they are fine. Going up the hill, I just went to positrack as the wet hill could leave you sitting on a turn or sliding back ( happened to two contractors). Always an adventure! Tim |
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#13 |
Registered User
Join Date: Apr 2022
Location: Medina, Ohio
Posts: 218
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Re: Converting to hydroboost
Hydroboost on my 67 BBC. Have it set up like orig 396 from 1968. Brakes work great. I have great vaccum mild cam, but this system works well with pwr steering.
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#14 |
Registered User
Join Date: Jul 2014
Location: phx az
Posts: 326
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Re: Converting to hydroboost
actually there really is one or two 'hydroboost' units.
they just have different mounting plates depending on what they came from, like an astro van or a 85 dually. I goto the local junk yard on half off day and pick up a few units/hoses for like $40 dolalrs. Then retro fit them into whatever vehicles. Right now a 78 scout ii, and a 97 s10, and another 1985 s10. The main issue is altering the brake pedal to get the correct ratio. many times i will get the entire pedal assemby from a hydroboosted vehicle and then either use the brake pedal or measure the distances from the 'swing to pin' ratio and copy that info. But to asnwer the qeustion, therye all the same, its just the 'bling bling' thats different.
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tubbed 1984 gmc jmmy http://67-72chevytrucks.com/vboard/s...d.php?t=639738 Alice Hombre http://67-72chevytrucks.com/vboard/s...d.php?t=808454 1963 Scout Retro-mod https://67-72chevytrucks.com/vboard/...d.php?t=854167 |
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#15 |
Registered User
Join Date: Apr 2015
Location: East Tn (In the heart of the Smoky Mtns)
Posts: 1,869
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Re: Converting to hydroboost
Sub’s for future projects
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#16 |
Registered User
Join Date: Oct 2022
Location: Jersey Village Texas
Posts: 1
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Re: Converting to hydroboost
You might want to consider an iBooster instead. Cleaner install and enhanced functionality.
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#17 | |
Registered User
Join Date: Dec 2022
Location: Redcliff, Alberta
Posts: 201
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Re: Converting to hydroboost
Quote:
My new engine is a tall deck big block, with aftermarket heads, (taller than factory) and stud girdle, which required valve cover spacers on each side, even with tall valve covers. Even with the hydroboost, the fittings coming out of the hydroboost, which are facing the valve cover, are only 1/4” or so away from each other.
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"If it ain't broken, fix it 'till it is!" |
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#18 |
Registered User
Join Date: Nov 2011
Location: Williamsburg, VA
Posts: 958
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Re: Converting to hydroboost
This is probably going to be a springtime project for my truck. Just to clear some space and add some braking power. They tend to make the brakes a bit touchy. It just takes some getting used to
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