v8ian
Posted a lot
Posts: 3,758
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Nov 14, 2023 13:42:08 GMT
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My toy is a 1973 Triumph Toledo, Fitted with a tuned 2.0 16v Vauxhall redtop. on ITBs, it is enormous fun and a bit of a sleeper, but its still on single circuit Master cylinder  It has better brakes, IE Vents and better callipers, but restricted by wheel size, I really do want to convert it to dual circuit, as it runs the stock Girlling MCyl my issue seems to be space, or the lack of it, I have no room to fit a bias box, either inside or out, so I'm looking for a dual circuit MCyl, about 7/8 bore or smaller, my issue is external space, the MCyl needs to be less than 6" or 150mm long, otherwise it hits the ITBs, everything I look at seem to be excessively long, somewhere there must be a shorter one that will do the job. Failing that it will be mounted sideways and Ill machine up a rocker arm system, but that is far more work than I want at the moment. Anybody have any suggestions for a shorter Mcyl? |
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Atmo V8 Power . No slicks , No gas + No bits missing . Doing it in style.
Austin A35van, very different------- but still doing it in style, going to be a funmoble
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Nov 14, 2023 14:19:59 GMT
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The mk3 mx5 ones are short and 7/8" bore, designed to go on a servo though so the push rod may take some fiddling.
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Nov 14, 2023 20:55:51 GMT
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Golf MK3 uses a rather short MC.
I believe most are 22mm.
They have 4 outlets.
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mk2cossie
Club Retro Rides Member
Posts: 2,950 
Club RR Member Number: 77
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Master cylinder options.mk2cossie
@mk2cossie
Club Retro Rides Member 77
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Nov 15, 2023 21:03:22 GMT
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Golf MK3 uses a rather short MC. I believe most are 22mm. They have 4 outlets. And also use pressure limiting valves for the rear brake lines I seem to remember |
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Nov 15, 2023 21:24:36 GMT
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I'm not too sure about that.. I thought the master cylinder was the same for drums&discs🤔 I used one from an all discs Golf mk3 on my Alfa and used a loose pressure limiting valve for the rear brakes. |
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Nov 16, 2023 21:54:11 GMT
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You don't need a bias box to fit a bias braking setup. You could do what I did and fit the masters directly to the bulkhead and the pivot in the brake pedal itself. Looks like this:     @lazaruspete did a similar thing on his Dolly but inset the masters into the firewall where I extended the threaded rods. That should net even more clearance. If you go for the integral pot ones they're only about 4" long. |
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v8ian
Posted a lot
Posts: 3,758
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Nov 16, 2023 22:31:24 GMT
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You don't need a bias box to fit a bias braking setup. You could do what I did and fit the masters directly to the bulkhead and the pivot in the brake pedal itself. Looks like this: @lazaruspete did a similar thing on his Dolly but inset the masters into the firewall where I extended the threaded rods. That should net even more clearance. If you go for the integral pot ones they're only about 4" long. Oooh I like that, any more pics? |
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Atmo V8 Power . No slicks , No gas + No bits missing . Doing it in style.
Austin A35van, very different------- but still doing it in style, going to be a funmoble
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Nov 16, 2023 23:47:20 GMT
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The last Spitfire 1500s had a dual circuit brake master that was the same flange fitting as the single circuit Girlings. Might not be within the required length though.....
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'57 Austin Cambridge A55 1800 Overdrive
'50 MG Y-type (In build)
'56 Standard Super 10 (In build)
'03 Fiat Stilo Abarth (Wet weather runabout)
'03 Citroen Berlingo HDi (Parts hauler)
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That's all I've got at the moment, but I've got a cad drawing of the mounting plate measurements too. Here's the main bits:  I reckon with that spacing the adjustment will be quite fine but it was necessary to get it within the existing T2000 bulkhead cutout. If you're cutting your own hole then I'd probably space the cylinders out a smidge further. |
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