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which master cylinder? |
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Home away from home  
Joined:
2005/9/5 14:02
From Bunbury Western Australia
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I got this information off of the PBR website for replacement brake parts.
I need a master cylinder that will work with a set of 120Y front disc brakes and 1200 rear drums. The car is a 1973 auto 1200 sedan but I can't figure out which master cylinder to order, here is the list.
ACTUATION Brake M/Cyl - Suit: 03/1974 - 12/1976 17.46 mm DISC/DRUM W/O MVAC JB1196
ACTUATION Brake M/Cyl - Suit: 01/1975 - 12/1977 19.05 mm DISC/DRUM WITH MVAC JB1181
ACTUATION Brake M/Cyl - Suit: 01/1977 - 03/1979 19.05 mm COUPE SEDAN DISC/DRUM PBR ORG P7217
ACTUATION Brake M/Cyl - Suit: 01/1978 - 03/1979 19.05 mm ALL BODY TYPES DISC/DRUM JB1172#(NLA)
ACTUATION Kit-B M/Cyl (Min) - Suit: 03/1974 - 12/1976 17.46 mm DISC/DRUM W/O MVAC K7605X#(NLA)
ACTUATION Kit-B M/Cyl (Min) - Suit: 03/1974 - 12/1976 17.46 mm DISC/DRUM W/O MVAC K7859X
ACTUATION Kit-B M/Cyl (Min) - Suit: 01/1975 - 12/1977 19.05 mm DISC/DRUM WITH MVAC K7606X
ACTUATION Kit-B M/Cyl (Min) - Suit: 01/1975 - 12/1977 19.05 mm DISC/DRUM WITH MVAC K7860X
ACTUATION Kit-B M/Cyl (Min) - Suit: 01/1977 - 03/1979 19.05 mm COUPE SEDAN DISC/DRUM PBR ORG K7627X#(NLA)
ACTUATION Kit-B M/Cyl (Min) - Suit: 01/1978 - 03/1979 19.05 mm ALL BODY TYPES DISC/DRUM K7606X
ACTUATION Kit-B M/Cyl (Min) - Suit: 01/1978 - 03/1979 19.05 mm ALL BODY TYPES DISC/DRUM K7860X
ACTUATION Kit-B M/Cyl (Alt) - Suit: 03/1974 - 12/1976 17.46 mm DISC/DRUM W/O MVAC K7638X
Posted on: 2006/6/12 15:07
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_________________
Two things that drive me nuts.....a dry road under a grey sky and a wet road under a blue sky, because no matter what, it's either too soon or too late to drive the way I want
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Re: which master cylinder? |
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No life (a.k.a. DattoMaster)  
Joined:
2002/8/11 8:22
From Perth
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Registered Users
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JB1196 is for disc front with no booster 11/16"
The pushrod is seperate to the master and stays on the pedal when the master is removed
JB1181 and JB1172 are the same thing 3/4"
They suit boosted system
This would be your minimum master to use
I'd probably step up to the Sunny master JB1289 which is 13/16"
The P7217 is PBR ADR stle unit with the big recatangular bottle.
Posted on: 2006/6/12 15:22
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Re: which master cylinder? |
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Home away from home 
Joined:
2006/5/30 5:53
From Brisbane
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is there much difference in piston bore size from the 120y to the 1200 coupe calipers, i would have thought the 11/16 would suit? do u need a larger m cyl for disc / disc? i'm running the 13/16, but with twin sumi's and R31 rears, and i only have about 10mm of movement before the pedal is hard? i'm running no booster
Posted on: 2006/6/15 11:57
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Re: which master cylinder? |
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No life (a.k.a. DattoMaster) 
Joined:
2004/5/28 5:02
From Adelaide, South Australia
Group:
Registered Users
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Quote: is there much difference in piston bore size from the 120y to the 1200 coupe calipers, i would have thought the 11/16 would suit? do u need a larger m cyl for disc / disc? i'm running the 13/16, but with twin sumi's and R31 rears, and i only have about 10mm of movement before the pedal is hard? i'm running no booster You can run a 4 pot front with a 2 pot rear with a 7/8 tandem master cylinder without a booster so you should be fine. 
Posted on: 2006/6/15 15:39
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_________________
"Anyone who has never made a mistake has never tried anything new"
Albert Einstein
Put stupid oversized photo here>>
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Re: which master cylinder? |
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No life (a.k.a. DattoMaster) Joined:
2002/8/11 8:22
From Perth
Group:
Registered Users
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Both run same 48mm pistons
Posted on: 2006/6/15 15:42
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Re: which master cylinder? |
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Home away from home Joined:
2005/9/5 14:02
From Bunbury Western Australia
Group:
Registered Users
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would the JB1289 fit into the 1200? and would the 1200 brake lines bolt up to it ok? would there be any modifications needed to fit the unit?
Posted on: 2006/6/15 15:51
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_________________
Two things that drive me nuts.....a dry road under a grey sky and a wet road under a blue sky, because no matter what, it's either too soon or too late to drive the way I want
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Re: which master cylinder? |
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No life (a.k.a. DattoMaster) 
Joined:
2003/12/3 0:49
From Burbank, CA
Group:
Registered Users
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the largest sunny MC works fine with wilwood 4 pots and the rear drums.
i think all the hardlines are the same.
Posted on: 2006/6/15 18:42
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|||\ 81 KPB310 /|||
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Re: which master cylinder? |
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No life (a.k.a. DattoMaster) Joined:
2002/8/11 8:22
From Perth
Group:
Registered Users
|
Yes
Yes
No
Posted on: 2006/6/16 12:22
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Re: which master cylinder? |
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Home away from home 
Joined:
2003/9/1 11:07
From Radelaide, South Australia
Group:
Registered Users
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i agree with killer1200, talk to craig at mad dat, he has the know how...
Posted on: 2006/6/17 14:56
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_________________
Boost.. boost.. BOOST!!! Gotta love Lag...
* 76 coupe, twin 40mm a12, project...
* 79 ute ca18det, track/street...
* 84 FJ45 landcruiser project...
* 88 D21 navara 4x4, sr20de vvt daily...
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Re: which master cylinder? |
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Home away from home Joined:
2003/9/1 11:07
From Radelaide, South Australia
Group:
Registered Users
|
i agree with killer1200, talk to craig at mad dat, he has the know how...
Posted on: 2006/6/17 14:56
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_________________
Boost.. boost.. BOOST!!! Gotta love Lag...
* 76 coupe, twin 40mm a12, project...
* 79 ute ca18det, track/street...
* 84 FJ45 landcruiser project...
* 88 D21 navara 4x4, sr20de vvt daily...
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