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#1 |
Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,333
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Manual disc brake, no power assist, factory or converted, who has? likes, dislikes???
A member here is considering going to manual disc brakes. 71 and 72's came with manual disc brakes.
Seems to be confusion about proper master cylinder for a manual disc 71 or 72. My Napa source is trusted by me. He show power and manual brakes in 71 and 72 to take SAME master cylinder. I bought one part number M2062. I have read some here that likes the setup. Everyone is different. I plan to convert my 67 and 68 both to manual disc brakes. I like the idea of losing the booster, gaining back the working space under the hood. Although being a Chevrolet it won't need much work after the installation!!! ![]() What's your take on this!!! If you have a variation of this manual setup, let us know. Any tips?? |
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#2 |
Registered User
Join Date: Jan 2017
Location: Larkspur, Colorado
Posts: 916
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
I have two trucks with manual discs. One is factory, 71 Half ton 2WD long box, The other is a 67 half ton SWB converted with 72 parts. I think the stopping performance of both is excellent considering the technology behind the brakes of the era. I’m 6 feet tall and have pretty long legs but even the more extreme angle of the manual brake pedal is OK and I don’t believe it uses excessive force to stop the truck. I’m happy with them and don’t feel I need to go power. That said bare in mind I grew up around things such as manual steering and brakes being completely normal and every day. They don’t feel out of place to me. And yes I like the simplicity that goes with it.
Steve weim55 Colorado Last edited by weim55; 06-17-2020 at 08:47 PM. |
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#3 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
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#4 |
Registered User
Join Date: Nov 2014
Location: Southwest Kansas
Posts: 306
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
I always liked manual brakes, disc or drum. I like my trucks simple and basic, but for the most part I like the "feel" of manual brakes, the feedback if you want.
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'64 C10 LWB, 283, 5speed '68 C20 LWB, 327, 4speed '69 C20 Custom Camper Longhorn, 350, 4speed '72 C20 Cheyenne Super, 396, TH400 '66 C60, 292, 4speed |
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#5 |
Registered User
Join Date: Jul 2019
Location: New Boston, NH
Posts: 456
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
I am perfectly happy with my 4 wheel drum, manual brake system. I like the fact I have to actually push on the pedal and not just rest on it! But that is just me, for ease of use, I would think discs are easier for most, but I don't see a real need for power.
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1968 C-20 CST Vermillion http://imageevent.com/happy_dan/dantoys/68c20 2019 Silverado 2012 Camaro ZL1 |
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#6 |
Junior Member
Join Date: Jul 2002
Location: Scottsdale, AZ
Posts: 1,701
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
I just put manual disks on my 61 Bel Air. I love it! I'm currently doing a disc/drum conversion on my 67 C10. Only reason I'm using a booster is it's already attached to the master/proportioning valve a buddy gave me. Otherwise I'd just to manual disc/drum again.
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"I was patina when patina wasn't cool." 1973 Cheyenne SWB Sunset Gold / Frost White / Saddle |
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#7 |
Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,337
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
Hi guys I have a 71 with factory disc’s up front, even have the disc brake decal on the tailgate. I had a heated discussion with my local Napa store owner. He’s insisting that his books only show one # ! He asked for the number stamped into my original master. I can’t find the number ? Can any help with the number for a original non power master cylinder ?
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71 C-20 07 Magnum RT AWD |
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#8 |
Senior Member
![]() Join Date: Jan 2013
Location: North Charleston SC
Posts: 504
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
Here is a picture of a 72 Manual Master Cylinder for manual brakes with the part # on the bottom. As far as I know it is the original one on the truck I parted out. MADE IN USA - 29881
Last edited by SIXTY9; 06-19-2020 at 08:20 AM. |
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#9 |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,151
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
I can't speak directly to C10/20 manual disc brakes but on Pontiac A and F bodies there is a difference in the bore sizes of the master cylinders of manual and power brake systems. (As far as I know GM only offered manual disc brakes in 71 and 72) I became very aware of this when the manual brake master cylinder on my 72 Firebird when bad years ago. The parts store only had one part number for all applications listed but when I installed it that part my brake pedal was very hard to push and I had no real braking power. After going round and round for days I finally discovered that there was in fact two different master cylinders with different bore diameters. I was able to get the correct master cylinder part number from an old paper parts book from the 70's that correctly listed the bore sizes and applications. Once I had that part number I was able to obtain the correct master cylinder and once again had great brakes.
I'm only regurgitating this as I find it hard to believe (after this experience) that the master cylinder would be the same for manual and power brakes. Maybe 68stepbed would be able to share the bore size of his master cylinder and we could compare that to bore size of previously discussed master cylinder and prove my theory one way or the other.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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#10 |
Registered User
![]() Join Date: Jun 2018
Location: Lucasville,oh
Posts: 61
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
Sixy9, can't quite make out the other numbers or name. can you let us know what they say.thanks
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#11 |
Senior Member
![]() Join Date: Jan 2013
Location: North Charleston SC
Posts: 504
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Re: Manual disc brake, no power assist, factory or converted, who has? likes, dislike
Sammy,
The other #s are B or D 17/1. There is no name on it other than MADE IN USA. Also when I changed over to WILWOOD master cylinder there tech was sure it was a 1" bore. |
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