Hydroboost
Thread Starter
Pro
Joined: Mar 2004
Posts: 686
Likes: 0
From: Southeast
Hydroboost
Hey guys,
I'm looking to put Hydroboost on my 71 sb with power brakes. The master cylinder needs replacing along with the lines and calipers. Why not do it now right?
I looked at the kits for C3s but they seem to be really expensive. I saw some hydroboost units from Astros on eBay. Do these work? What goes into putting one of these units on?
I'm looking to put Hydroboost on my 71 sb with power brakes. The master cylinder needs replacing along with the lines and calipers. Why not do it now right?
I looked at the kits for C3s but they seem to be really expensive. I saw some hydroboost units from Astros on eBay. Do these work? What goes into putting one of these units on?
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
There is actually quite a bit of work going into testing and modifying a used Hydro to go into a C3. The high mileage units are just not worth the trouble and the low mileage units are hard to find and usually expensive.
All I need is an email and I can send you an information packet with pics and diagrams and explanations of what it takes.
All I need is an email and I can send you an information packet with pics and diagrams and explanations of what it takes.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Intermediate
Joined: Oct 2007
Posts: 29
Likes: 1
From: Nashville,TN
One ton truck hydroboost units
Have an '83 and '85 K3500 GMC which I replaced both working hydroboost units on for preventative reasons. Any reason they wouldn't work on a C3? Presume the special ps pumps have to be used as well. Thanks.
Last edited by CLW; Sep 30, 2008 at 07:55 PM. Reason: incorrect spelling
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
The stock Vette power steering pump will work, and you'll need a '77 or later master.
The truck Hydros are a lot harder to use. Most don't have the same bolt pattern, and they usually have a skinny pedal rod with a size change right where the shaft needs to be threaded for the clevis. Because of the size change, the clevis won't fit, and a new longer one with a smaller bore needs to be used.
The truck Hydros can be used...it's just a lot harder.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Racer
Joined: Feb 2006
Posts: 480
Likes: 0
From: Springfield MO
Its not that bad, im in the middle of it right now with one off of a 94 GMC truck, you do have to cut into your firewall because the HB is off-set from the bolt pattern but besides that not that bad! Be prepared to remove your steering wheel, there is a write up on the forum on the whole hydroboost install with pictures, just search.
Racer
Joined: Aug 2000
Posts: 488
Likes: 0
From: Fremont,CA
Hey guys,
I'm looking to put Hydroboost on my 71 sb with power brakes. The master cylinder needs replacing along with the lines and calipers. Why not do it now right? I looked at the kits for C3s but they seem to be really expensive. I saw some hydroboost units from Astros on eBay. Do these work? What goes into putting one of these units on?
I'm looking to put Hydroboost on my 71 sb with power brakes. The master cylinder needs replacing along with the lines and calipers. Why not do it now right?
I looked at the kits for C3s but they seem to be really expensive. I saw some hydroboost units from Astros on eBay. Do these work? What goes into putting one of these units on?http://www.babcox.com/editorial/bf/bf030542.htm
Race Director
Joined: Dec 1999
Posts: 11,091
Likes: 990
From: Sierra Foothills CA
100%
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Its not that bad, im in the middle of it right now with one off of a 94 GMC truck, you do have to cut into your firewall because the HB is off-set from the bolt pattern but besides that not that bad! Be prepared to remove your steering wheel, there is a write up on the forum on the whole hydroboost install with pictures, just search.
The only reason you have to cut the firewall is if you have manual brakes and are installing a Hydrobooster. Oh, and why did you have to remove the steering wheel?
In my packet is a template of the firewall and the location of the new hole...and special mounting brackets can be had to utilize the lower pedal assembly bolts as the lower mounting bolts of the Hydro...using the original booster studs as the upper mounting studs.
Manual brake cars do need a different brake light switch since you're using the lower pedal hole for the pedal rod, and you need to move the body hole of the Hydro down lower and use the special plate.
Other than that it's not much different. In some cases even the stock hard lines from the master to the dist. block will still work.