944 N/A brakes to 1303 questions (yet another)

[eldavid]

Originally Posted by boygenius

I think its a 1987 911 SC.

What are its cylinder bore sizes? I'm asking because I have a master cylinder that appears to be from a 911 (like you describe). Its cylinder bore sizes are 23(23.81mm?) and 14(14.29mm?). If I apply Shad's brake bias ratio calculation to this master cylinder using 944 N/A calipers, I get .81045:1. I don't think this ratio is what I would want. Compare this to using the 944 master cylinder with 944 N/A calipers, yielding a ratio of 1.43577:1.

-emerson

[boygenius]

Originally Posted by eldavid

What are its cylinder bore sizes? I'm asking because I have a master cylinder that appears to be from a 911 (like you describe). Its cylinder bore sizes are 23(23.81mm?) and 14(14.??). If I apply Shad's brake bias ratio equation to this cylinder using 944 calipers, I get .778:1. I don't think this ratio is what I would want.

-emerson

Don't know. When I bought it it was said to be in working order so I'm going to use it as is. If I have a problem when I go to bleed the brakes in a few weeks and I have to rebuild it I will let you know. If it ain't broke don't fix it.

[eldavid]

See my updated previous post with updated calculations.
-emerson

[super vw]

For sure let us know how the 911 master/C works....