Which Master Cylinder? 66 Coupe with disc/disc - Vintage Mustang Forums

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post #1 of 5 (permalink) Old 04-09-2010, 02:55 AM Thread Starter
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Which Master Cylinder? 66 Coupe with disc/disc

I've done a lot of searching because I'm sure this has been talked about before, but everyone who talks specific m/c's has a front disc/rear drum setup. I'm doing a complete power disc setup at all four corners. I've seen some m/c's being sold at Mustang vendors online, but the prices seem a little high ($100+).

I'd like to check my local autozone or napa for a possible cost savings and easy parts replacement, but I'm not sure what m/c to ask for. What year/make/model car would be a direct bolt on to my setup. I'd like to find a typical dual-chamber steel type with metal capt due to the kind of brake bleeding kit I have. Anyone know the answer? Thanks.


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post #2 of 5 (permalink) Old 04-09-2010, 03:09 PM
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I'd like to find one as well. What size brakes are you using? I know that a lot of people use sn95 master cylinders, but I want something that looks more original.

71 Mach1 M code 4 speed (sold)
64 1/2 F code coupe built April 1st-Poppy Red

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post #3 of 5 (permalink) Old 04-09-2010, 03:47 PM
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I used one from a Jeep. It is all steel w/ metal cap. 15\16" bore I think? Runs 2003 cobra setup. 13" front 11.8 rear disc. Manual brakes. Stops like its power.
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post #4 of 5 (permalink) Old 04-09-2010, 04:50 PM
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You'll want either a 15/16" bore or a 1" bore. Personally I like the 1", to me there's too
much pedal travel with a 15/16" bore. The 15/16" will give you a slightly lighter pedal.
You'll want pretty big reservoirs front and rear and no residual check valves in either
front or rear port for a 4 wheel disc car.
For a 1" MC I like the 1985 Lincoln Towncar unit. Aluminum construction, ports on the
engine side. Big reservoirs. Appearance-wise, it looks like it belongs under the Mustang
hood. No check valves.
I've got one on a 66 with 4 piston fronts and Versailles setup in back.
Also got the same MC on a 68. Same 4 piston fronts and 2.5" drum rear. (that one came
from Cobra Automotive though- put a Wilwood residual valve into the rear line)
Here's a shot of the MC on my 68 coupe.....
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File Type: jpg CobraAutomotivealummastercylx.jpg (92.1 KB, 47 views)

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Last edited by GT289; 04-09-2010 at 05:19 PM.
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post #5 of 5 (permalink) Old 04-10-2010, 11:27 PM
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I use an 85 tbird master myself...7/8" bore, but my brakes are manual...I also happened to find an aluminum version(since some are aluminum, an some are cast iron) from autozone at $15 for remanned unit...custom lines required as outlets are on passenger side

66 mustang coupe,Heidts Mustang II front end 4.6L DOHC mod motor, T45 transmission, 8.8" disc rear end, twin turbo system in progress, and a ton of other crap

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