help!!!!

Post by **nt66** » Wed Apr 01, 2009 11:17 pm

I am trying to find out what the piston sizes are on the stock brake master cylinder and clutch master cylinder thanks ( ineed these numbers really bad)

Post by **dr.occa** » Thu Apr 02, 2009 7:38 am

the bore is 13/16". is that what you're looking for?

Post by **dr.occa** » Thu Apr 02, 2009 8:05 am

if you're looking to go bigger, try a master cylinder out of a Nissan 200sx 1.8 or 2.0. it has a 15/16" bore size as opposed to the 86's 13/16" bore.

AE86 MC:

200sx MC:

just check on how the mounting holes line up right.

Post by **nt66** » Thu Apr 02, 2009 5:36 pm

now what i need is the size of the clutch master

Post by **dr.occa** » Thu Apr 02, 2009 10:47 pm

nt66 wrote:now what i need is the size of the clutch master

5/8"

i actually responded with both information on your C4AG post earlier.

Post by **nt66** » Thu Apr 02, 2009 11:12 pm

oh and i was reading that a bigger master equals less pedal travle but less clamping force at the calipers so if anything i will go a little smaller

Post by **dr.occa** » Fri Apr 03, 2009 7:56 am

nt66 wrote:oh and i was reading that a bigger master equals less pedal travle but less clamping force at the calipers so if anything i will go a little smaller

also, you might consider going with a longer cylinder as well. the idea w/ the longer cylinder on a narrower bore is it makes up for the benefits of a larger bore in reducing pedal travel. that way you get both good clamping and less effort