BritishV8 Forum: Source for brake M/C

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6435 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Source for brake M/C

Posted by: BlownMGB-V8
Date: June 10, 2018 08:06AM

The Mark-I MGB used a metal canister type 3/4" bore M/C, the early Spitfire used the same M/C with an 11/16" bore.

I need one with a 5/8" bore.

Does anyone know what car that was used in?

Jim

ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1164 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

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Re: Source for brake M/C

Posted by: ex-tyke
Date: June 10, 2018 10:04AM

Might try Wilwood
[www.ebay.com]

[www.ebay.com]

Lots of motorcycles use 5/8"bore cylinders but might not be configured right for your application.
Austin Mini had a .70" bore master.

Edited 1 time(s). Last edit at 06/10/2018 10:50AM by ex-tyke.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6435 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

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Re: Source for brake M/C

Posted by: BlownMGB-V8
Date: June 10, 2018 12:32PM

Thanks Graham, that'll be the last resort as I'd have to reconfigure the line(s) and I'd rather have matching M/C's. My balance bar needs a little help as it is at the end and still needs more.

I'd like to stick with the tin-can reservoir OEM type if I can find one. The Mini is a little closer than the Spitfire/Midget one but my calculations indicate the 5/8" would be a better match.

Jim

ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1164 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

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Re: Source for brake M/C

Posted by: ex-tyke
Date: June 10, 2018 12:55PM

Might investigate re-sleeving your 3/4" M/C and getting a 5/8 rebuild kit and piston.(you're good at lathe work)

Do it yourself or have White Post do for you.
[whitepost.com]

Edited 1 time(s). Last edit at 06/10/2018 12:58PM by ex-tyke.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6435 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Source for brake M/C

Posted by: BlownMGB-V8
Date: June 10, 2018 01:05PM

Actually that was wrong, the 11/16 bore is less than .700" so the Spitfire M/C would be better than the Mini.

But my guess is that an earlier car, maybe something pre-disc brake would have used a 5/8" bore.

Jim

MGBV8
Carl Floyd
Kingsport, TN
(4467 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB Buick 215

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Re: Source for brake M/C

Posted by: MGBV8
Date: June 10, 2018 01:14PM

[www.jegs.com]

[www.ebay.com]

geezer
Charles Durning
Magee, MS
(58 posts)

Registered:
11/16/2017 01:16PM

Main British Car:
1974 MGB, 1967 Morris Minor

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Re: Source for brake M/C

Posted by: geezer
Date: June 11, 2018 11:26AM

Jim,

You might look into a clutch master cyl from a Midget, Sprite, or a Spitfire. If memory serves me they are smaller than the brake cyl.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6435 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Source for brake M/C

Posted by: BlownMGB-V8
Date: June 11, 2018 02:15PM

Yes, they are 11/16". I need 5/8"

Jim

ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1164 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar

Re: Source for brake M/C

Posted by: ex-tyke
Date: June 11, 2018 05:39PM

I assume that you want a dual circuit M/C (rather than a single)
Might not be anything out there that small ......I still maintain that sleeving is a viable option.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6435 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Source for brake M/C

Posted by: BlownMGB-V8
Date: June 11, 2018 08:02PM

Actually Graham I'm looking for a single circuit M/C and would also consider a clutch M/C. I have a twin master/balance bar setup, with dashboard adjustment knob. Currently both M/C's are 3/4" bore just like the mark I and II cars use.

Apparently the Minx used a 5/8" M/C for the clutch which I think would work, Lockheed No. 4223-917 Where to get a new one is the question.

Jim

ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1164 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar

Re: Source for brake M/C

Posted by: ex-tyke
Date: June 11, 2018 08:34PM

If your looking for a basic single circuit master, check the Dorman website for clutch masters . Here's one 5/8" bore example for a Ford Courier.
[www.dormanproducts.com]

Edited 1 time(s). Last edit at 06/11/2018 08:41PM by ex-tyke.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6435 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Source for brake M/C

Posted by: BlownMGB-V8
Date: June 12, 2018 08:34AM

That Dorman does look pretty good. I've sent Kelvin a note to see if maybe Moss might have the Minx part. If not I may have to go with one of those types.

Jim

geezer
Charles Durning
Magee, MS
(58 posts)

Registered:
11/16/2017 01:16PM

Main British Car:
1974 MGB, 1967 Morris Minor

authors avatar

Re: Source for brake M/C

Posted by: geezer
Date: June 12, 2018 10:40AM

Subaru uses a 5/8 clutch master

[www.rockauto.com]

From a Mazda

[www.rockauto.com]

Edited 1 time(s). Last edit at 06/12/2018 10:45AM by geezer.

ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1164 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar

Re: Source for brake M/C

Posted by: ex-tyke
Date: June 12, 2018 12:04PM

Could try these guys...
[www.powertrackbrakes.co.uk]

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6435 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Source for brake M/C

Posted by: BlownMGB-V8
Date: June 12, 2018 04:20PM

Thanks Graham, I just sent them an email.

Moss has the .700" one for the midget.

Jim

mgb260
Jim Nichols
Sequim,WA
(2392 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Source for brake M/C

Posted by: mgb260
Date: June 12, 2018 04:48PM

The Datsun/Nissan Z master:

[www.ebay.com]

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6435 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Source for brake M/C

Posted by: BlownMGB-V8
Date: June 15, 2018 03:09PM

Got one coming from UK. NOS, hopefully get here in the next couple weeks.

Jim

ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1164 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar

Re: Source for brake M/C

Posted by: ex-tyke
Date: June 15, 2018 03:44PM

Quote:
Got one coming from UK. NOS, hopefully get here in the next couple weeks.

Application?....photo?....inquring minds need to know!

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6435 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar

Re: Source for brake M/C

Posted by: BlownMGB-V8
Date: June 16, 2018 10:11AM

I'll post a photo when it gets here but as far as I can tell it looks just like the early MGB round tin can master. (or clutch M/C which is what it is) May be zinc galvanized rather than cadmium chromated.

Application is Rapier Minx, part number is Lockheed AP # 4223 - 917.

No longer being made according to one source. N.O.S. like I mentioned, no idea how many are left. My guess, not many.

Jim

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