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skline
I got a 20mm Master Cylinder for a 80's SC and was told it will fit on my car. Brad? Any tips on installing this bad boy? Or anyone else out there with any experience in this endeavor?
Brad Roberts
20mm ? Show a pic of it. The only thing I can think of that might be different is the inlet holes might be in a different location.

B
hargray2
Didn't someone recently ask about a M/C with a "20" cast into it that turned out to be a power assist unit?
skline
Oh great, so it may not work at all? Here is a few pictures of different angles. Let me know what this is and if I can use it.
skline
Second shot
skline
Last one
davep
That is for a boosted unit, can't see how it would work.
The only 20mm that normally fits was the one used with the 911 aluminum S calipers. This started with the 69 911S. As soon as they went with power brakes the whole design changed. The original 20mm has been unavailable for a very long time.
ClayPerrine
There is a factory 19mm master cylinder that will bolt on to a 914. It was used on 911s with the S-calipers. There is also a 23mm Mercedes Benz unit that will bolt onto a 914. You have to do some adjusting to the brake lines to get it on the car. If you use it with stock or slightly upgraded brakes, you will get a very hard pedal and no travel. It would be good for very large, multi-piston calipers.
skline
Well, I have stock rear calipers so I could retain the E brake, I have Volvo 240DL calipers up front which are 4 piston. Currently I have a stock 17mm MC, how do you think it will be like it is?
ClayPerrine
With that setup, just put the 19mm master cylinder into the car. Your brakes will be fine.
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