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#1
07-30-2022, 05:55 PM
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MASTER CYLINDER NEEDED
Many years ago I took the power booster off my 69 GTO and I believe I put a MC on it that was for Disc brakes without power. Where can I find one ?
Won't make Norwalk otherwise. OGR
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 3 Generations of "Beach Boys Racing" ! Everybody knows somthin. Nobody knows everything ! 1st time on a dragstrip, 1964. Flagstart ! "Thanks for the entertainment." "Real Indians Don't Wear Bowties" |
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#2
07-30-2022, 06:44 PM
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Replacement boosters have 2 rods with them. You should be all set for almost any 69 GM car.
Ames has em.
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
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#3
07-30-2022, 06:53 PM
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I guess my question wasn't clear ? I need a master cylinder for disc brakes, but no power brakes.
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3 Generations of "Beach Boys Racing" ! Everybody knows somthin. Nobody knows everything ! 1st time on a dragstrip, 1964. Flagstart ! "Thanks for the entertainment." "Real Indians Don't Wear Bowties" |
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#4
07-30-2022, 07:01 PM
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It's been little over 20 years, but the last oem master/manual disc setup I put together for a '68-72 GTO I used a rebuilt manual disc master for a '68 Chevelle manual disc car. I'd bet not something one can order any more at local O'Reillys.
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Buzzards gotta eat... same as worms. |
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#5
07-30-2022, 07:13 PM
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Maybe this will help. You need a 1" bore master for manual disc brakes.
https://www.chevelles.com/threads/wh...linder.247363/
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Remember no one is perfect. Everyone's butt has a crack in it! |
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#6
07-30-2022, 07:15 PM
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__________________
Remember no one is perfect. Everyone's butt has a crack in it! |
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#7
07-30-2022, 09:09 PM
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I have an original from a '71 Formula. I am sure it would need to be checked out, gone through though.
Manual disc brake, the tall style Master Cylinder.
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
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#8
07-30-2022, 09:13 PM
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I believe the MBM MC309 will work for you.
https://mbmbrakes.com/mc309-gm-1967-...ster-cylinder/ MBM description: GM 1967-1977 Cast Iron with Bleeders 1-1/8" Bore; Deep Hole 9/16" & 1/2" Ports on Left Side with Bleeder Valves Licensed GM Restoration Part Exact Copy of Original w/ casting number 5468309 There are a few on line vendors. Be aware that there will not be a residual valve for the rear drums in this MC. They do recommend the use of an inline residual valve but it is not absolutely necessary and say to use one at your discretion. I am not sure of the 69 models but according to the 68 service manual all models used a 1-1/8" MC with Disc Brakes Also, Tuff Stuff Performance has a selection of MCs 1" or 1-1/8" bores with deep or shallow piston holes. https://www.tuffstuffperformance.com...cylinders.html Dave
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68 GTO 68 LeMans 68 LeMans Convertible 79 Firebird 
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#9
07-31-2022, 09:10 AM
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I used the Right Stuff on my 72.
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 A new best of 9.135 @ 145.4171 Lemans Sport. 72 Lemans Sport. |
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#10
07-31-2022, 09:57 PM
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Do you have 4 wheel disc brakes or front disc, rear drum?
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Remember no one is perfect. Everyone's butt has a crack in it! |
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#11
08-01-2022, 11:37 AM
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Quote:
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3 Generations of "Beach Boys Racing" ! Everybody knows somthin. Nobody knows everything ! 1st time on a dragstrip, 1964. Flagstart ! "Thanks for the entertainment." "Real Indians Don't Wear Bowties" |
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#12
08-01-2022, 02:50 PM
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These may help in your search.
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#13
08-04-2022, 06:40 PM
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Found a MC at auto zone, NM1489. Doesn't look original but installed it does have a firm brake pedal.
Off to Norwalk !
__________________
3 Generations of "Beach Boys Racing" ! Everybody knows somthin. Nobody knows everything ! 1st time on a dragstrip, 1964. Flagstart ! "Thanks for the entertainment." "Real Indians Don't Wear Bowties" |
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#14
08-05-2022, 04:14 PM
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Quote:
Great that you found one local. Just for my future reference, did this MC have the residual valve in the rear port? Thanks, Dave
__________________
68 GTO 68 LeMans 68 LeMans Convertible 79 Firebird
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#15
08-06-2022, 02:52 PM
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Quote:
__________________
3 Generations of "Beach Boys Racing" ! Everybody knows somthin. Nobody knows everything ! 1st time on a dragstrip, 1964. Flagstart ! "Thanks for the entertainment." "Real Indians Don't Wear Bowties" |
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