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09-28-2004, 03:41 AM
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#1 |
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Registered User
Join Date: Feb 2003
Location: Lakewood,Ca
Posts: 69
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4 Wheel Disc Brakes
Well im gathering all of my parts to convert to disc brakes in the rear.Its a 69 3/4 ton.I would like to use a corvette master cylinder and porp. valve but i cant remember what year will work best for my application.Any help on this would be appreciated.Thanks!
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1969 C-20,383 stroker,sm465,custom long travel front suspension,4 wheel disc brakes,35" pro comps...mods under way include: 4x4 conversion,and custom bumpers.future mods include: gear vendors od unit,and relocation of fuel cell. |
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09-28-2004, 06:49 AM
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#2 |
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Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,771
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MC from a 78 Corvette,rear calipers from a 84 Cadillac Eldorado(has parking brake in it)Caliper mounts from TSM.
That's what I have on my 71 Blazer anyway.  This is the best pic of my Corvette MC I could find 
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE |
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09-28-2004, 09:08 AM
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#3 |
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Registered User
 
Join Date: Feb 2001
Location: East Central, MO
Posts: 11,336
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How does that parking brake work? original cable or??????
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09-28-2004, 12:00 PM
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#4 |
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Registered User
Join Date: Jun 2003
Location: spokane wa
Posts: 2,189
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Well I'll tell ya, it is of course your own preference.
I use stock MC's and never had a problem. A good amount of the kits we have sold we have never installed a MC. But of course you are probably swapping everything over to disc and from what I have heard and read the corvette one seems to be what the guys on here install, when going from drums to disc.. I installed a kit on my 3/4 ton and have yet to have a braking issue. It is also my daily driver  As for the emer brake we sell the bracket that attaches to the caliper to work with your cable. There are a lot of options out there but thought I would jump in  You can check it out by clicking o the link in my sig. Here are a couple of shots of it installed on my '72
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09-28-2004, 02:59 PM
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#5 |
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Registered User
Join Date: Feb 2003
Location: Lakewood,Ca
Posts: 69
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would u use the prop. valve off a 78 vette too?
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1969 C-20,383 stroker,sm465,custom long travel front suspension,4 wheel disc brakes,35" pro comps...mods under way include: 4x4 conversion,and custom bumpers.future mods include: gear vendors od unit,and relocation of fuel cell. |
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09-28-2004, 03:12 PM
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#6 |
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Registered User
Join Date: Jun 2003
Location: spokane wa
Posts: 2,189
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If i was going to upgrade from all drums to disc, I would probably just use a 3/4 mc or hydro assist. But thats what i have laying around..
Some people swap to corvette or other style, and some don't.. Mainly a trial and error item on our year trucks
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09-28-2004, 03:32 PM
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#7 |
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Registered User
Join Date: Feb 2001
Location: East Central, MO
Posts: 11,336
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I'm just running a regular old MC with booster for drums and I dont have any problems with mine at all. I have been driving it like this for about 8 years. I do change the pads regularly and get the cheaper pads. It stops great.
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09-29-2004, 01:31 AM
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#8 |
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Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,771
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I used my orig. brake cable.I had to shorten it by about 2" though.I also had to make some small mods to the Eldorado e-brake bracket.
Problem I have found though is the orig e-brake pedal does not have enough travel to FULLY engage the e-brake. It does engage,but it needs a smiggin more travel to have full e-brake pressure on the rotor.
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE |
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09-29-2004, 03:20 AM
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#9 |
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Geared for Collision
Join Date: Jan 2004
Location: St. Louis, Mo.
Posts: 683
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i used the master cylinder and proportioning valve off a 78 vette on mine. also used the rod but had to turn down the end that goes in the booster just a few thousands as it fit too tight. also had to take about a quarter inch off the length of the rod. havent got it on the road yet but heres a pic and comparison pics of vette vs stock pieces.
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MEMBER OF THE 4 WHEEL DISK BRAKE CLUB 1970 C/K20 3/4 Ton 1996 Collectors Edition Corvette 1977 Corvette Coupe |
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09-29-2004, 03:27 AM
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#10 |
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Geared for Collision
Join Date: Jan 2004
Location: St. Louis, Mo.
Posts: 683
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heres a pic comparing the rods, the vette rod being on the left
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MEMBER OF THE 4 WHEEL DISK BRAKE CLUB 1970 C/K20 3/4 Ton 1996 Collectors Edition Corvette 1977 Corvette Coupe Last edited by Budweis; 09-29-2004 at 03:32 AM. |
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09-29-2004, 09:28 PM
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#11 |
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Registered User
Join Date: Feb 2003
Location: Lakewood,Ca
Posts: 69
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Why did u change out to the vette rod?Would i have to do that if i use vette mc and prop. valve?
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1969 C-20,383 stroker,sm465,custom long travel front suspension,4 wheel disc brakes,35" pro comps...mods under way include: 4x4 conversion,and custom bumpers.future mods include: gear vendors od unit,and relocation of fuel cell. |
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09-29-2004, 09:30 PM
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#12 |
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Geared for Collision
Join Date: Jan 2004
Location: St. Louis, Mo.
Posts: 683
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changed it because where it goes in master cylinder is different on vette mc and seemed like easier route to modify vette one as its two piece rod.
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MEMBER OF THE 4 WHEEL DISK BRAKE CLUB 1970 C/K20 3/4 Ton 1996 Collectors Edition Corvette 1977 Corvette Coupe |
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