LS1 manual brakes 15/16 or 1 inch master ?

[E30M30]

I'm installing ls1 front and rear brakes on my 67 firebird with manual brakes. Kore3 and touring classics both ask me what master I want to run. What do you guys think ?

[importkiller69ss]

i am running a 1" bore with mine but i only have them on the front right now..i am running power brakes though.i didnt use a prop valve i went with the willwood residual valve on the rear brakes..hope this helps

[E30M30]

OK thanks !

Has anyone run ls1 brakes front and rear, with manual brakes ? I can't be the only one ;-)

[dhutton]

Why don't you check out the Wilwood 7/8 master? I'm going to use one with my C5 front and LS1 rear calipers. This is supposed to be one of the better performing manual masters.

Don

[1FstChevy]

I was going to say I changed my brake plans so I actually have a great condition LS1 Master on hand that I haven't gotten around to selling.

Its off a late 4th Gen T/A that had 20K on it. Not sure if you'd be interested but its super clean, including the use only DOT3 fluid sticker on the cap. I believe its 7/8ths and I'd let it go for $25 +shipping if anyone is interested, better to see it used than sit around, & its been sealed in a big zip lock since removed so no contamination!

[Apogee]

...Its off a late 4th Gen T/A...I believe its 7/8ths...

I believe it's a 1" bore, just like all of the other LS1 4th gen F-body master cylinders, unless it was swapped from something else.

[1FstChevy]

Yea whatever measurement it is, it was the same as the C5 Master which I went with instead since the lines connect to the other side.