![]() |
Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
![]() |
#1 |
Post Whore
![]() Join Date: Feb 2000
Location: Rose Hill, KS, USA
Posts: 12,683
|
My hydraulic clutch and Hydroboost setup
Been seeing some posts the last couple days about hydroboost so I thought I would do a detailed post about the install of a hydroboost system and hydraulic clutch from a donor 1989 Chevy 1 ton (old body style) on to my 1969 Chevy K20.
I really like the hydroboost brake system but, of course, I was used to manual brakes so any assist was welcome. The hydraulic clutch is also nice. I would have had a major problem using the stock z-bar setup with the headers and the swapped in bbc. When I started contemplating this project, member MikeC mentioned that it might be wise to reinforce the firewall due to the weight of the hydroboost and fact that I was adding the hydraulic clutch. I had a buddy cut me this reinforcement for my firewall with his plasma cutter. ![]() I have a template of this reinforcement that also has the location of the various holes that were needed. Let me know if a copy of this template is needed by anyone. I have to mail it so I would need your mailing address. Another buddy made me the metal shim you see that positions the hydraulic cylinder correctly so the push rod will attach to the clutch pedal. ![]() The 1989 old body style 1 ton hydraulic clutch master is angled requiring the shim. I later found out that the new body style hydraulic clutch master would not have required that shim. Regarding the shim for the hydraulic clutch cylinder, the way I have it made, it attaches right next to the hydroboost bracket. The template is angled so the bottom is 5/8" thick and the top of the shim angles down to 1/16" thick. The shim is 2 5/8" wide x 2 5/8" tall. I got the cylinder mounted on the firewall, threaded the push rod and am using a 5/16" threaded clevis rod end to attach the rod to the clutch pedal. Cycles freely and the rod will push in as far as needed. Might have to make a stop to limit the clutch pedal. ![]() I am using the 1989's engine and bellhousing so the slave cylinder was already attached to the bellhousing. Next I got the hydroboost brake cylinder hung on the firewall. I had to knock the two lower stud bolts off the pedal assembly and drill a couple holes but no biggie. Because of how this is mounted, I have to modify how the steering column attaches to the firewall as the brake booster bracket covers one of the attachment holes. ![]() Mounted the rod to the brake pedal same as with the clutch. The brake booster rod is 3/8" while the hydraulic clutch rod is 5/16". I cut off the end of the brake booster push rod, threaded it and got it connected to the brake pedal using another clevis rod end. ![]() I did have to have the high pressure line modified. I took the 1989 1 ton's high pressure line along with the stock high pressure line and had them combined - this allowed the metric end to be at the hydroboost master cylinder and they flare end to fit the stock steering box. Here are some finished pics. ![]() ![]()
__________________
1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by augie; 04-09-2011 at 11:14 PM. Reason: http://67-72chevytrucks.com/gallery/data/1093/firewallsupport43.jpg |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|