1980 brake master cylinder

[pantera928]

Can anyone tell me what the part number is for a 1980 brake master cylinder? It looks to be a GM.

Thanks

[pantera928]

So nobody knows???

[ronmanfredi]

The guy who sold me his 82 model has an invoice in the paperwork for brake master cylinder: A1 Cardone 10-1379

[pantera928]

That looks like it now if i can find someone who has it in stock! Thanks

[A0136]

Avanti 800278.    May be the same as the Cardone number.   I believe it’s a ford MC 

[pantera928]

30 minutes ago, A0136 said:

Avanti 800278.    May be the same as the Cardone number.   I believe it’s a ford MC 

I think you may be correct.

[Steve-Avanti]

In my 77 we put a new Master cylinder out of a 67 Mercury Cyclone 390 with front disc brakes.  Has worked flawlessly since 2016.   

[Zedman]

I went through this exercise back in January this year.  The MC is the same as was used in various Fords from 1967 to 71  eg Fairlaine.  Lots of US suppliers are listing it cheaply but show 'No stock'.

Important:

It has a 15/16" bore and has a restrictor valve fitted in the underslung port for slow bleedback of the rear Brake drums.

My solution wasn't so cheap because I ended up having to sleeve the pitted bore and send it out for reconditioning altogether.  Hopefully you can find one off the shelf at a reasonable cost otherwise you might have to have it recoed.

 

 

Edited October 20, 2023 by Zedman

[WayneC]

Dorman M64822 @ Walmart:   https://www.walmart.com/search?q=Dorman+M64822

[WayneC]

Forgot to mention it may need pipe thread size adapters to connect to the Avanti brake tubing; adapters are available at auto parts stores.

[John D]

Bought one from Bob Ziff at avantiparts.biz last year, reasonable price. 

[pantera928]

Okay, here is what I ended up with. From O'Reilly Auto Parts. A BrakeBest Select NMC11143. New not a reman and came with the adapter for the bottom brake line connector

[Zedman]

9 hours ago, pantera928 said:

Okay, here is what I ended up with. From O'Reilly Auto Parts. A BrakeBest Select NMC11143. New not a reman and came with the adapter for the bottom brake line connector

All good ....and the correct bore size  too! 👍

[pantera928]

On 10/30/2023 at 1:36 AM, Zedman said:

All good ....and the correct bore size  too! 👍

not certain but it stops great. It was a direct cross for the A1 Cardone 10-1379 according to the parts guy.

Car stops better than ever.

• Bore Size (in): 0.940 Inch

 

Edited November 1, 2023 by pantera928

[Zedman]

On 10/31/2023 at 10:31 AM, pantera928 said:

not certain but it stops great. It was a direct cross for the A1 Cardone 10-1379 according to the parts guy.

Car stops better than ever.

• Bore Size (in): 0.940 Inch

 

Yep- that's the original 15/16" bore. Best outcome.  👍 There are lots of Master cylinders that look identical our units and will fit up, but have 1" bores. I'm not quite sure what the upshot of using one of those would be but surely the pedal travel would be far less.

[John D]

Less travel at more pedal effort if you use a larger bore. I went opposite on my 1941 President, used a 1" vs 1-1/8" original. Pedal feel is much improved! But yes I have to keep them well adjusted.