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10-28-2011, 10:22 PM | #26 |
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Re: Single to Dual Res Master Cylinder Conversion
i agree protrash, I tried my best to mimic ChoifRocka's over the belly bending method, but I think he's practiced on a few more than I have, took me 2 tries...
ol skool - prop valve not required on a drum/drum setup. You CAN install one, but really same dia wheel cyls all around, same size line all around, AND, most importantly, a true drum/drum master cylinder is set up such that some pseudo-proportioning is done by the way it is designed, i.e. this is why the line to the front brakes is attached to the rear port on the master - it is designed such that the front brakes "lead" a little bit, or something like that - but even a dual drum setup doesnt equally apply front back all at the same time (a single res master cylinder would though) Again, I think you certainly can install a prop valve is you want to fine-tune - but, unfortunately, I had to "test" my brakes yesterday when some moron decided to slam on her brakes in the middle of the intersection because the light turned yellow... I almost creamed her, but the new brakes worked very well. Skidded just a bit, very controllable, etc. Whew.... |
05-02-2012, 06:37 PM | #27 | |
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Re: Single to Dual Res Master Cylinder Conversion
Quote:
I did a search for the words: drum master rear port and this thread came up in the search. Thanks for the answer for which ports go to front & rear. Posted via Mobile Device
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05-02-2012, 07:55 PM | #28 |
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Re: Single to Dual Res Master Cylinder Conversion
I just did this on my 64 as well.
except I think I asked for a 69 C10 mc.. looks the same except mine has a bolt thru center holding cap on versus the snap ring. We went ahead and replaced every hard line, all 3 rubber hoses, hardware, shoes, and wheel cyclinders.... plus used synthetic brake fuild. Local old timer says it'll help with brake fade when in traffic. I thought Id have to adjust my rod from pedal, but as it was with single mc, the rod is touching, in rest position, the inside of the mc. If I adjust it into the mc, it's going to put pressure on... Anyone else NOT have to adjust their rod?
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Tim Road Hounds |
05-02-2012, 10:55 PM | #29 | |
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Re: Single to Dual Res Master Cylinder Conversion
Quote:
I would guess the single and dual manual master cylinders are the same depth. Posted via Mobile Device
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05-02-2012, 11:02 PM | #30 |
Hollister, CA.
Join Date: Sep 2006
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Re: Single to Dual Res Master Cylinder Conversion
Now that I'm married, I feel rod adjustment happens more often ... lol ...
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05-02-2012, 11:33 PM | #31 |
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Re: Single to Dual Res Master Cylinder Conversion
grumpy, i didn't have to adjust mine - the single and dual res non-power master cylinders are the same depth indent in the piston, so shouldn't need much, if any adjustment. It's when one changes from non-power to power (or power to non-power, for that matter) that a major adjustment in rod length is required.
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05-02-2012, 11:38 PM | #32 |
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Re: Single to Dual Res Master Cylinder Conversion
Good deal..
that musta been what I was thinking.. I changed pwr mc last yr on a 65. I knew I had to lengthen the rod on one of them...
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Tim Road Hounds |
05-02-2012, 11:50 PM | #33 |
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Re: Single to Dual Res Master Cylinder Conversion
So, if a rear wheel cylinder goes out and leaks all the rear fluid out, do I still have front brakes with this dual master cylinder setup?
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05-03-2012, 12:19 AM | #34 |
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Re: Single to Dual Res Master Cylinder Conversion
Yes you do....
but dont panic stop...
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Tim Road Hounds |
05-03-2012, 12:14 PM | #35 |
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Re: Single to Dual Res Master Cylinder Conversion
nice bending work!
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03-23-2013, 10:30 AM | #36 |
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Re: Single to Dual Res Master Cylinder Conversion
Just thought i would bring this back up for myself and others, as im going to do this to my truck soon.
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03-24-2013, 08:43 AM | #37 |
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Re: Single to Dual Res Master Cylinder Conversion
thanks,
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04-23-2014, 07:20 PM | #38 |
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Re: Single to Dual Res Master Cylinder Conversion
hi guys
am struggling with my power brake conversion on my 62 GMC installed the Captains bracket, using S10 power booster, using 1968 dual master cylinder can not for the life of me, get any balance in the brakes, the back will lock up easily and not much on the front vacuum bled all the lines, bench bled the master rears still locking up drum drum set up suggestions Please |
04-23-2014, 08:59 PM | #39 |
Hollister, CA.
Join Date: Sep 2006
Location: Hollister, Ca.
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Re: Single to Dual Res Master Cylinder Conversion
Are the lines in the correct ports ?
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John What the Heck is that ?? CURRENT BUILDS: 62 BurbMaster Other Builds: My '63 C-10,LWB,CC,BBW '06 HD StrAight Axle Swap Father/Son '67 C-20, LQ9,4L80,Bagged,8-Lugger !!Good Friend Richard's Build AMERICAN CUSTOMS & CLASSICS (831) 630-1965 www.ACCHOLLISTER.com ACC on FACEBOOK "Rest in Peace, Mom & Dad ... I will see you again someday!" |
04-23-2014, 11:58 PM | #40 |
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Re: Single to Dual Res Master Cylinder Conversion
The S10 booster will have a short intermediate pushrod. The '67-'70 master needs a long intermediate pushrod. Did you change the intermediate pushrod?
X2 on the correct ports. The front port is front brakes on that master.
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04-26-2014, 10:43 AM | #41 |
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Re: Single to Dual Res Master Cylinder Conversion
hi guys
thanks so very much for all your suggestions will try them all and see if I can sort it out regards JM |
09-29-2014, 12:44 AM | #42 |
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Re: Single to Dual Res Master Cylinder Conversion
I did this several months back.
Now I'm wanting to add power brakes. I would rather not have to bleed my brakes again. Is there a way to use my existing dual master cylinder with a booster? Is it just a matter of using the right intermediate rod?
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09-29-2014, 01:00 AM | #43 |
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Re: Single to Dual Res Master Cylinder Conversion
Yes you will need the correct intermediate pushrod for the master that you have. Which master did you use?
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09-29-2014, 01:00 AM | #44 |
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Re: Single to Dual Res Master Cylinder Conversion
I think I found the answer here:
http://67-72chevytrucks.com/vboard/s...d.php?t=482770
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09-29-2014, 01:01 AM | #45 | |
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Re: Single to Dual Res Master Cylinder Conversion
Quote:
I think it was either the 67 impala or a 67 c10.
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09-29-2014, 01:07 AM | #46 | |
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Re: Single to Dual Res Master Cylinder Conversion
Yep, It's for an Impala:
Quote:
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09-30-2014, 12:11 AM | #47 |
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Re: Single to Dual Res Master Cylinder Conversion
I've been searching the forums.
Is there like two or three different lengths of intermediate rods? I mean, if my master has a deep bore, is there a such and such length versus the length of the intermediate rod for the shallow bore master?
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09-30-2014, 11:57 PM | #48 |
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Re: Single to Dual Res Master Cylinder Conversion
To my knowledge there are only 2 different lengths of intermediate pushrods. There is one for the deep bore in the back of the master cylinder piston and one for the shallow bore. Some of the aftermarket boosters have an adjustable intermediate pushrod.
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
10-01-2014, 12:14 AM | #49 | |
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Re: Single to Dual Res Master Cylinder Conversion
Quote:
Here was another good thread I found on the topic: http://67-72chevytrucks.com/vboard/s....php?p=6337677
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10-05-2014, 01:37 AM | #50 |
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Re: Single to Dual Res Master Cylinder Conversion
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